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Kazuaki Takehara - One of the best experts on this subject based on the ideXlab platform.
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doi:10.1155/2012/847505 Research Article Genetic Analysis of Avian Influenza Viruses: Cocirculation of
2016Co-Authors: Nonstructural B Gene, Dany Shoham, Kazuaki TakeharaAbstract:Copyright © 2012 Alam Jahangir et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The pandemic influenza virus strains of 1918 (H1N1), 1957 (H2N2), 1968 (H3N2), and 2009 (H1N1) have genes related to avian influenza viruses (AIVs). The nonstructural (NS) gene of AIVs plays a significant role in host-viral interaction. However, little is known about the degree of diversity of this gene in Northern pintail (Anas acuta) ducks wintering in Japan. This study describes characteristics of pintail-originated H1N1, H1N2, H1N3, H5N2, H5N3, H5N9, and H7N7 viruses. Most of the viruses were revealed to be avian strains and not related to pandemic and seasonal flu strains. Nevertheless, the NP genes of 62.5 % (5/8) viruses were found closely related to a A/swine/Korea/C12/08, indicating exchange of genetic material and ongoing mammalian-linked evolution of AIVs. Besides, all the viruses, except Aomori/422/07 H1N1, contain PSIQSR∗GLFmotif usually found in avian, porcine, and human H1 strains. The Aomori/422/07 H1N1 has a PSVQSR∗GLF motif identical to a North American strain. This findings linked to an important intercontinental, Asian-American biogeographical interface. Phylogenetically all the viruses were clustered in Eurasian lineage. Cocirculation of allele A and B (NS gene) viruses was evident in the study implying the existence o
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genetic analysis of avian influenza viruses cocirculation of avian influenza viruses with allele a and b nonstructural gene in northern pintail Anas acuta ducks wintering in japan
Influenza Research and Treatment, 2012Co-Authors: Alam Jahangir, Sakchai Ruenphet, Dany Shoham, Kazuaki Takehara, Nadia SultanaAbstract:The pandemic influenza virus strains of 1918 (H1N1), 1957 (H2N2), 1968 (H3N2), and 2009 (H1N1) have genes related to avian influenza viruses (AIVs). The nonstructural (NS) gene of AIVs plays a significant role in host-viral interaction. However, little is known about the degree of diversity of this gene in Northern pintail (Anas acuta) ducks wintering in Japan. This study describes characteristics of pintail-originated H1N1, H1N2, H1N3, H5N2, H5N3, H5N9, and H7N7 viruses. Most of the viruses were revealed to be avian strains and not related to pandemic and seasonal flu strains. Nevertheless, the NP genes of 62.5% (5/8) viruses were found closely related to a A/swine/Korea/C12/08, indicating exchange of genetic material and ongoing mammalian-linked evolution of AIVs. Besides, all the viruses, except Aomori/422/07 H1N1, contain PSIQSR∗GLF motif usually found in avian, porcine, and human H1 strains. The Aomori/422/07 H1N1 has a PSVQSR∗GLF motif identical to a North American strain. This findings linked to an important intercontinental, Asian-American biogeographical interface. Phylogenetically all the viruses were clustered in Eurasian lineage. Cocirculation of allele A and B (NS gene) viruses was evident in the study implying the existence of a wide reservoir of influenza A viruses in pintail wintering in Japan.
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surveillance and characterization of newcastle disease viruses isolated from northern pintail Anas acuta in japan during 2006 09
Avian Diseases, 2011Co-Authors: Sakchai Ruenphet, Alam Jahangir, Dany Shoham, Masashi Okamura, Masayuki Nakamura, Kae Morikawa, Yuki Miyoshi, Eiko Hanawa, Kazuaki TakeharaAbstract:A total of 38 Newcastle disease virus (NDV) isolates were obtained from 6060 fecal samples from northern pintail (Anas acuta) ducks collected in the Tohoku district in Japan during 2006-09. One isolate from each sampling location and date was selected for a total of 38 isolates, then 15 of these were characterized for their pathogenicity by mean death time of minimum lethal dose (MDT/MLD) using chicken embryos and by plaque formation on chicken embryo fibroblasts. Furthermore, nine isolates were randomly selected from these 15 isolates, and the fusion protein genes were sequenced to characterize amino acid sequences around the cleavage site. All 15 were confirmed to be nonvirulent by MDT/MLD test, and nine isolates were also confirmed as nonvirulent by the cleavage site of the fusion protein 112G/E-K/R-Q-G/E-R*L117 that was specific for nonvirulent NDVs. The characteristics of nine isolates identified by phylogenic analysis of the fusion protein gene indicated that the isolates belong to genotype I or II. In addition, we also isolated 68 avian influenza viruses and 28 other hemagglutinating viruses. Our data indicate that northern pintails are subclinically infected by, perpetuate, and distribute NDV along with different subtypes of avian influenza viruses and other hemagglutinating viruses during their migrations across vast areas over the Northern Hemisphere to Japan.
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Haemagglutinin and neuraminidase characterization of low pathogenic H5 and H7 avian influenza viruses isolated from Northern pintails (Anas acuta) in Japan, with special reference to genomic and biogeographical aspects
Virus Genes, 2010Co-Authors: Alam Jahangir, Sakchai Ruenphet, Dany Shoham, Masashi Okamura, Masayuki Nakamaura, Kazuaki TakeharaAbstract:Pintails constitute an important host of avian influenza viruses (AIVs). Genetic, molecular, and antigenic characteristics of H5 and H7 AIVs, which we isolated from northern pintails ( Anas acuta ) wintering in Japan, were analyzed and found to be linked to various ecological features, chiefly in terms of gene geography, as shaped by various migratory aquatic host species. Although all the isolates were found to be of low pathogenicity (LP), we explored gene predispositions that may potentially underlie tentative transition to high pathogenicity (HP). Evolutionarily, the HA and NA genes of the isolates affiliated mostly with Eurasian lineage. The viruses closely related to ours were derived from China, Korea, Mongolia, Japan, and Australia. Comprehensive ecophylogenetic evaluations revealed that the pintail populations we sampled might have given rise to or been involved in the emergence of a LPAI H7N6 subtype that caused outbreaks in quail ( Coturnix japonica ) farms in Japan, as well as of the first H5N9 subtype ever isolated in Asia. The latter strain isolated by us showed, yet, notable affinity to certain North American and Australian strains, thereby signifying apparent intercontinental interfaces accounted for by extensive water-bird flyways. Noticeable conservation of certain antigenic sites within both Eurasian and North American H7 HAs is apparently an outcome of their advantageous survival value, in terms of restricted immunogenicity. Besides, the Japanese–Korean–Siberian regional axis seems to be particularly important for ongoing generation of novel viral strains due to conveyance of certain genes and genomes by migratory ducks, including such that circulate among pigs and human.
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phenotypic genetic and phylogeographical characterization of avian influenza virus subtype h5n2 isolated from northern pintail Anas acuta in japan
Virus Research, 2009Co-Authors: Alam Jahangir, Sakchai Ruenphet, Dany Shoham, Masashi Okamura, Masayuki Nakamaura, Kazuaki TakeharaAbstract:Intercontinental movements of northern pintail (Anas acuta) ducks wintering in Japan create a high-risk of both incursion and dispersion of avian influenza viruses (AIVs) that circulate in the ducks’ breeding grounds in Siberia and Alaska. This predisposition is likely amplified by bi-directional conveyance of AIVs between Japan and China. In this study, H5N2 viruses were characterized by means of HA cleavage site sequencing and found to be low pathogenic. Through entire genome analysis, as well as in ovo and in vitro pathogenicity tests, one isolate – A/northern pintail/Akita/714/06 H5N2 (Akita/714/06 H5N2) – was characterized. Comparative molecular analysis revealed that genes of this virus have 97.5–99.6% and 96.7–100% likeness at nucleotide and at amino acid level, respectively, with genes of different subtypes of viruses isolated from China, Korea, Russia, and Italy. Phylogenetically, Akita/714/06 (H5N2) clustered with viruses isolated from Eurasian countries. Partial affinity to a recent Korean porcine strain is noticeable. Related evolutionary, ecological, and phenotypic aspects were discussed, thereby signifying the importance of the described pathogen–host–ecosystem interfaces.
José Antonio - One of the best experts on this subject based on the ideXlab platform.
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Salida de campo a Laguna de Duero (Valladolid) el 27 de febrero de 1953
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo a Laguna de Duero, en la provincia de Valladolid, durante la mañana del 27 de febrero de 1953, de la que se anotaron observaciones sobre rAnas (sin identificar las especies), los siguientes mamíferos: Arvicola sapidus (Rata de agua, también llamado Ratón aguadero) y Topillo (seguramente, del género Microtus), y las siguientes aves: Alondra (seguramente, Alauda arvensis, la Alondra común), Anas acuta (Ánade rabudo), Anas penelope (Silbón europeo), Anas platyrhynchos (Ánade azulón, también llamado Pato bravío por el autor), Anthus sp. (Bisbita), Ardea sp. (Garza), Certhia sp. (Agateador, también conocido como Chapin), Ciconia ciconia (Cigüeña blanca), Clamator glandarius (Críalo europeo), Corvus corone (Corneja negra), Corvus frugilegus (Graja), Cyanistes caeruleus (Herrerillo común, llamado Parus coeruleus por el autor), Dendrocopos sp. (Pico, llamado Dryobates sp. por el autor), Emberiza cia (Escribano montesino), Emberiza schoeniclus (Escribano palustre), Larus sp. (Gaviota), Lophophanes cristatus (Herrerillo capuchino, llamado Parus cristarus por el autor), Lullula arborea (Totovía), Fringilla sp. (Pinzón), Gallinago gallinago (Agachadiza común, llamada Capella gallinago por el autor), Numenius arquata (Zarapito real), Parus major (Carbonero común, también conocido como Chapin), Passer montanus (Gorrión molinero), Phylloscopus sp. (Mosquitero), Pica pica (Urraca, llamada "marica" y "picarza" por el autor), Picus viridis (Pito real), Pluvialis apricaria (Chorlito Dorado Europeo, llamado Charadrius apricarius por el autor), Podiceps cristatus (Somormujo lavanco; la observación parece ser errónea), Regulus ignicapillus (Reyezuelo listado), Serinus serinus (Verdecillo), Sturnus unicolor (Estornino negro), Tringa ochropus (Andarríos grande), Turdus merula (Mirlo común), Upupa epops (Abubilla, también llamada Bubillo por el autor) y Vanellus vanellus (Avefría europea). Se incluyen el análisis del contenido estomacal de una Garza, apuntes sobre asociaciones interespecíficas, y pequeñas y variadas ilustraciones a bolígrafo de la excurción.Field trip to Laguna de Duero, in the province of Valladolid, during the morning of the 27th of February of 1953, of which there were noted observations about frogs (without identifying the species), the following mammals: Arvicola sapidus (Rata de agua, también llamado Ratón aguadero) and Vole (probably, belonging to Microtus), and the following birds: Anas acuta (Northern Pintail), Anas penelope (Eurasian Wigeon), Anas platyrhynchos (Mallard), Anthus sp. (Pipit), Ardea sp. (Heron), Certhia sp. (Tree-creeper), Ciconia ciconia (White Stork), Clamator glandarius (Great Spotted Cuckoo), Corvus corone (Carrion Crow), Corvus frugilegus (Rook), Cyanistes caeruleus (Blue Tit, refered as Parus coeruleus by the author), Dendrocopos sp. (Woodpecker, refered as Dryobates sp. by the author), Emberiza cia (Rock Bunting), Emberiza schoeniclus (Reed Bunting), Fringilla sp. (Chaffinch), Gallinago gallinago (Common Snipe, refered as Capella gallinago by the author), Larus sp. (Gull), Lophophanes cristatus (Crested Tit, refered as Parus cristatus by the author), Lullula arborea (Wood Lark), Numenius arquata (Eurasian Curlew), Parus major (Great Tit), Passer montanus (Eurasian Tree Sparrow), Phylloscopus sp. (Warbler), Pica pica (Black-billed Magpie), Picus viridis (Eurasian Green Woodpecker), Pluvialis apricaria (Eurasian Golden Plover, refered as Charadrius apricarius by the author), Podiceps sp. (Great Crested Grebe; the observation may be wrong), Regulus ignicapillus (Firecrest), Serinus serinus (European Serin), Skylark (probably, Alauda arvensis, the Eurasian Skylark), Sturnus unicolor (Spotless Starling), Tringa ochropus (Green Sandpiper), Turdus merula (Eurasian Blackbird), Upupa epops (Eurasia Hoopoe) and Vanellus vanellus (Northern Lapwing). The stomach content analysis of a Heron, notes about intespecific associations, and different varied little pen illustrations about the trip are also included
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Salida de campo a la laguna de La Nava (Fuentes de Nava, Palencia) el 9 de diciembre de 1953
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo a la laguna de La Nava, en Fuentes de Nava (Palencia), el 9 de diciembre de 1953, de la que se anotaron observaciones sobre las siguientes aves: Anas acuta (Ánade rabudo), Anas crecca (Cerceta común), Anas penelope (Silbón europeo), Anas platyrhynchos (Ánade azulón, también llamado Pato bravío por el autor), Anser sp. (Ánsar), Grus grus (Grulla común), Numenius sp. (Zarapito) y Tringa ochropus (Andarríos grande).Field trip to the lake of La Nava, at Fuentes de Nava (Palencia), the 9th of December of 1953, of which there were noted observations about the following birds: Anas acuta (Northern Pintail), Anas crecca (Common Teal), Anas penelope (Eurasian Wigeon), Anas platyrhynchos (Mallard), Anser sp. (Goose), Grus grus (Common Crane), Numenius sp. (Curlew) and Tringa ochropus (Green Sandpiper)
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Salida de campo a Laguna de Duero (Valladolid) en marzo de 1948
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo de varios días de duración a Laguna de Duero (Valladolid) durante marzo de 1948 de la que se anotaron observaciones sobre las siguientes aves: Alauda arvensis (Alondra común), Anas acuta (Ánade rabudo), Anas platyrhynchos (Ánade azulón), Anas querquedula (Cerceta carretona), Anthus pratensis (Bisbita común), Ardea cinerea (Garza real), Ardea purpurea (Garza imperial), Calidris alpina (Correlimos común), Ciconia ciconia (Cigüeña blanca), Circus cyaneus (Aguilucho pálido), Emberiza schoeniclus (Escribano palustre), Falco tinnunculus (Cernícalo vulgar), Fulica atra (Focha común), Galerida cristata (Cogujada común), Gallinago gallinago (Agachadiza común, llamada Capella gallinago por el autor), Gallinula chloropus (Gallineta común), Himantopus himantopus (Cigüeñuela común), Larus ridibundus (Gaviota reidora), Lymnocryptes minimus (Agachadiza chica), Melanocorypha calandra (Calandria),Milvus milvus (Milano real), Numenius sp. (Zarapito), Rallus aquaticus (Rascón europeo), Saxicola torquata (Tarabilla común,Sturnus unicolor (Estornino negro), Tachybaptus ruficollis (Zampullín común), Turdus merula (Mirlo común), Turdus philomelos (Zorzal común, actualmente sinónimo de T.ericetorum o T.muscicus) y Vanellus vanellus (Avefría europea)Field trips of several days to Laguna de Duero (Valladolid) during March of 1948 of which there were noted observations about the following birds: Alauda arvensis (Eurasian Skylark), Anas acuta (Northern Pintail), Anas platyrhynchos (Mallard), Anas querquedula (Garganey), Anthus pratensis (Meadow Pipit), Ardea cinerea (Grey Heron), Ardea purpurea (Purple Heron), Calidris alpina (Dunlin), Ciconia ciconia (White Stork), Circus cyaneus (Northern Harrier), Emberiza schoeniclus (Reed Bunting), Falco tinnunculus (Common Kestrel), Fulica atra (Common Coot), Galerida cristata (Crested Lark), Gallinago gallinago (Common Snipe, refered as Capella gallinago by the author), Gallinula chloropus (Common Moorhen), Himantopus himantopus (Black-winged Stilt), Larus ridibundus (Common Black-headed Gull), Lymnocryptes minimus (Jack Snipe), Melanocorypha calandra (Calandria Lark), Milvus milvus (Red Kite), Numenius sp. (Curlew), Rallus aquaticus (Water Rail), Saxicola torquata (African Stonechat), Sturnus unicolor (Spotless Starling), Tachybaptus ruficollis (Little Greebe), Turdus merula (Eurasian Blackbird), Turdus philomelos (Song Thrush, currently synonymous of T.ericetorum or T.muscicus)y Vanellus vanellus (Northern Lapwing
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Notas sobre la colección del Instituto Padre Suárez de Granada, en 1958
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Notas sobre la colección del Instituto Padre Suárez de Granada (de 1886, de D. Rafael García Alvárez), en 1958, de la que se anotaron observaciones sobre los siguientes mamíferos: Canis lupus (Lobo), Capra pyrenaica (Cabra montés), Capreolus capreolus (Corzo), Cervus elaphus (Ciervo), Dama dama (Gamo), Glis glis (Lirón gris), Herpestes ichneumon (Meloncillo), Lepus sp. (Liebre), Lutra lutra (Nutria), Lynx pardinus (Lince ibérico), Martes foina (Garduña), Martes martes (Marta), Meles meles (Tejón, también llamado Tasugo), Mus sp. (Ratón), Mustela nivalis (Comadreja), Mustela putorius (Turón), Phocaena phocoena (Marsopa), Sciurus vulgaris (Ardilla roja), Sus scrofa (Jabalí), Talpa europaea (Topo común), Ursus arctos (Oso pardo) y Vulpes vulpes (Zorro, también llamado Raposo por el autor), y las siguientes aves: Anas acuta (Ánade rabudo), Anas clypeata (Cuchara Común, llamado Anas spatula por el autor), Anas crecca (Cerceta común), Anas penelope (Silbón europeo), Anas querquedula (Cerceta carretona), Anas strepera (Ánade friso), Dendrocopos medius (Pico mediano, llamado Dryobates medius o Picus medius por el autor), Fulica atra (Focha común), Fulica cristata (Focha moruna), Gypaetus barbatus (Quebrantahuesos), Luscinia svecica (Pechiazul, llamado Cyanecula suecica por el autor), Phoenicopterus ruber (Flamenco común), Plegadis falcinellus (Morito común), Regulus regulus (Reyezuelo sencillo, llamado en ocasiones R.cristatus por el autor), Tachybaptus ruficollis (Zampullín común, llamado Podiceps ruficollis por el autor) y Vanellus melanopterus (Avefría lugubroide).Notes about the collection (of 1886, by D. Rafael García Alvárez) of the Instituto Padre Suárez of Granada, in 1958, of which there were noted observations about the following mammals: Canis lupus (Gray Wolf), Capra pyrenaica (Spanish Ibex), Capreolus capreolus (Roe Deer), Cervus elaphus (Red Deer), Dama dama (Fallow Deer), Glis glis (Fat Dormouse), Herpestes ichneumon (Egyptian Mongoose), Lepus sp. (Hare), Lutra lutra (Eurasian Otter), Lynx pardinus (Iberian Lynx), Martes foina (Beech Marten), Martes martes (European Pine Marten), Meles meles (Eurasian Badger), Mus sp. (Mouse), Mustela nivalis (Least Weasel), Mustela putorius (European Polecat), Phocaena phocoena (Porpoise), Sciurus vulgaris (Red Squirrel), Sus scrofa (Wild Boar), Talpa europaea (European Mole), Ursus arctos (Brown Bear) and Vulpes vulpes (Red Fox), and the following birds: Anas acuta (Northern Pintail), Anas clypeata (Northern Shoveler, refered as Ana spatula by the author), Anas crecca (Common Teal), Anas penelope (Eurasian Wigeon), Anas querquedula (Garganey), Anas strepera (Gadwall), Dendrocopos medius (Middle Spotted Woodpecker, refered as Dryobates medius or Picus medius by the author), Fulica atra (Common Coot), Fulica cristata (Red-knobbed Coot), Gypaetus barbatus (Lammergeier), Luscinia svecica (Bluethroat, refered as Cyanecula suecica by the author), Phoenicopterus ruber (Caribbean Flamingo), Plegadis falcinellus (Glossy Ibis), Regulus regulus (Goldcrest, occasionally refered as R.cristatus by the author), Tachybaptus ruficollis (Little Greebe, refered as Pocideps ruficollis by the author) and Vanellus melanopterus (Black-winged Lapwing)
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Resumen de las notas de Carlos Valverde desde el 14 al 28 y de Mariano del 4 de noviembre de 1951, de salidas de campo a Valdestillas (Valladolid)
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Resumen de las Notas de Carlos Valverde Gómez de de salidas de campo a Valdestillas (Valladolid) entre el 14 y el 28 de noviembre de 1951, y de Mariano del 4 de noviembre de 1951, en las que aparecen las siguientes aves: Anas acuta (Ánade rabudo), Anas crecca (Cerceta común), Anas penelope (Silbón europeo), Anas platyrhynchos (Ánade azulón), Anser sp. (Ánsar), Anthus sp. (probablemente, el Bisbita alpino, A.spinoletta), Ardea cinerea (Garza real), Buteo buteo (Busardo ratonero), Columba oenas (Paloma zurita), Columba palumbus (Paloma torcaz), Columba livia (Paloma bravía), Cyanopica cooki (Rabilargo, llamado "Charro" y C. cyana por el autor), Emberiza cia (Escribano montesino), Falco peregrinus (Halcón peregrino), Falco subbuteo (Alcotán), Gallinago gallinago (Agachadiza común, llamada Capella gallinago por el autor), Milvus milvus (Milano real), Motacilla alba (Lavandera blanca), Scolopax rusticola (Chocha perdiz, también llamada Becada), Tringa ochropus (Andarríos grande), Turdus merula (Mirlo común), Turdus ericetorum (considerado actualmente Turdus philomelos, el Zorzal común), Turdus musicus (considerado actualmente Turdus philomelos, el Zorzal común), Turdus pilaris (Zorzal real) y Turdus viscivorus (Zorzal charlo).Summary of the notes of the field trips of Carlos Valverde Gómez to Valdestillas (Valladolid) between the 14th and the 28th of November of 1951, and those of Mariano of the 4th of November of 1951, in which the following birds are included: Anas acuta (Northern Pintail), Anas crecca (Common Teal), Anas penelope (Eurasian Wigeon), Anas platyrhynchos (Mallard), Anser sp. (Goose), Anthus sp. (possibly, the Water Pipit, A.spinoletta), Ardea cinerea (Grey Heron), Buteo buteo (Common Buzzard), Columba oenas (Stock Pigeon), Columba palumbus (Common Wood-pigeon), Columba livia (Rock Pigeon), Cyanopica cooki (Azure-winged Magpie, refered as C. cyana by the author), Emberiza cia (Rock Bunting), Falco peregrinus (Peregrine Falcon), Falco subbuteo (Eurasian Hobby), Gallinago gallinago (Common Snipe, refered as Capella gallinago by the author), Milvus milvus (Red Kite), Motacilla alba (White Wagtail), Scolopax rusticola (Eurasian Woodcock), Tringa ochropus (Green Sandpiper), Turdus merula (Eurasian Blackbird), Turdus ericetorum (currently considered Turdus philomelos, the Song Thrush), Turdus musicus (currently considered Turdus philomelos, the Song Thrush), Turdus pilaris (Fieldfare) and Turdus viscivorus (Mistle Thrush)
Paul L. Flint - One of the best experts on this subject based on the ideXlab platform.
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Logistic regression models of variation in avian influenza virus (AIV) seroprevalence in adult waterfowl sampled in Alaska, USA, 1998–2010 (n = 3,588).
2013Co-Authors: Heather M. Wilson, Paul L. Flint, Jeffery S. Hall, Christian J. Franson, Craig R. Ely, Joel A. Schmutz, Michael D. SamuelAbstract:ak = number of parameters in model.bThe best approximating model has the lowest Akaike's Information Criterion (AIC) value and the highest model weight (ωi), relative to others in the model set.In this model suite, only the effects of species and sex were examined. Species include tundra swan (TUSW; Cygnus columbianus), cackling goose (CACG; Branta hutchinsii), Pacific black brant (BLBR; B. bernicla nigricans), greater white-fronted goose (GWFG; Anser albifrons), emperor goose (EMGO; A. canagica), northern pintail (NOPI; Anas acuta), Pacific common eider (COEI; Somateria mollissima v-nigrum), spectacled eider (SPEI; S. fischeri), Steller's eider (STEI; Polysticta stelleri), long-tailed duck (LTDU; Clangula hyemalis), and black scoter (BLSC; Melanitta nigra).
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Logistic regression models of variation in avian influenza virus (AIV) seroprevalence in waterfowl sampled in Alaska, USA, 1998–2010 (n = 3405), examining the effects of age while controlling for sex and species.
2013Co-Authors: Heather M. Wilson, Paul L. Flint, Jeffery S. Hall, Christian J. Franson, Craig R. Ely, Joel A. Schmutz, Michael D. SamuelAbstract:ak = number of parameters in model.bThe best approximating model has the lowest Akaike's Information Criterion (AIC) value and the highest model weight (ωi), relative to others in the model set.Ages classes included “sub-adult”, representing hatch year (HY) birds for northern pintails and second year (SY) birds for all other species, and “adults”, representing after hatch year (AHY) birds for northern pintails and/or after second year (ASY) birds for other species. Species include tundra swan (TUSW; Cygnus columbianus), cackling goose (CACG; Branta hutchinsii), greater white-fronted goose (GWFG; Anser albifrons), Pacific black brant (BLBR; B. bernicla nigricans), and northern pintail (NOPI; Anas acuta).
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variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in japan
Journal of Avian Biology, 2011Co-Authors: Jerry W Hupp, Paul L. Flint, John M Pearce, Andrew M Ramey, Noriyuki Yamaguchi, Tetsuo Shimada, Kenichi Tokita, Sergei Kharitonov, Hiroyoshi HiguchiAbstract:In North America, spring migration routes and breeding distribution of northern pintails Anas acuta vary because some individuals opportunistically nest at mid-latitudes in years when ephemeral prairie wetlands are available, whereas others regularly nest in arctic and sub-arctic regions where wetland abundance is more constant. Less was known about migration routes and breeding distribution of pintails in East Asia. From 2007–2009 we marked 198 pintails on their wintering areas in Japan with satellite transmitters to: 1) document spring migration routes and summer distribution, 2) evaluate migratory connections and breeding season sympatry with North American pintails, and 3) determine if pintails used the same migration routes in fall as in spring. Most pintails (67%) migrated to the Kamchatka or Chukotka peninsulas in eastern Russia either directly from Japan or via Sakhalin Island, Russia. Remaining pintails primarily migrated to the Magadan region or Kolyma River Basin in eastern Russia via Sakhalin Island. The Chukotka Peninsula was the most common summer destination, with highest densities in the Anadyr Lowlands; a region also used by pintails that migrate from North America. One pintail migrated to St. Lawrence Island, Alaska, in spring and another briefly migrated to the western coast of Alaska in fall. Autumn migration routes generally mirrored spring migration although most pintails bypassed Sakhalin Island in fall. Compared to North American pintails, pintails that winter in Japan exhibited less variation in migration routes and breeding distribution, and nested at higher latitudes. In the Russian Far East there is no region with habitats comparable in extent to the ephemeral mid-latitude wetlands of North America. Consequently, East Asian pintails mainly nest in arctic and sub-arctic regions where annual consistency in wetlands promotes constancy in migration routes and breeding distribution. Breeding season sympatry between pintails from different continents results more from North American pintails migrating to eastern Russia than from Japanese pintails migrating to North America.
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intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails Anas acuta in alaska examining the evidence through space and time
Virology, 2010Co-Authors: Andrew M Ramey, Paul L. Flint, Christian J. Franson, John M Pearce, Dirk V Derksen, Bradley D Scotton, Michael J Petrula, Kristine M Sowl, Michael L Wege, Kimberly A TrustAbstract:Migration and population genetic data for northern pintails (Anas acuta) and phylogenetic analysis of low pathogenic avian influenza (LPAI) viruses from this host in Alaska suggest that northern pintails are involved in ongoing intercontinental transmission of avian influenza. Here, we further refine this conclusion through phylogenetic analyses which demonstrate that detection of foreign lineage gene segments is spatially dependent and consistent through time. Our results show detection of foreign lineage gene segments to be most likely at sample locations on the Alaska Peninsula and least likely along the Southern Alaska Coast. Asian lineages detected at four gene segments persisted across years, suggesting maintenance in avian hosts that migrate to Alaska each year from Asia or in hosts that remain in Alaska throughout the year. Alternatively, live viruses may persist in the environment and re-infect birds in subsequent seasons.
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satellite tracking of northern pintail Anas acuta during outbreaks of the h5n1 virus in japan implications for virus spread
Ibis, 2010Co-Authors: Noriyuki Yamaguchi, Paul L. Flint, Jerry W Hupp, Hiroyoshi Higuchi, John M PearceAbstract:We fitted Northern Pintail Anas acuta in Japan with satellite transmitters and monitored their spring migration movements relative to locations where the highly pathogenic H5N1 avian influenza virus was detected in Whooper Swans Cygnus cygnus in 2008. Pintails were assumed not to be infected with the H5N1 virus at the time they were marked because capture occurred between 2 and 5 months before reported outbreaks of the virus in Japan. We assessed spatial and temporal overlap between marked birds and occurrence of the virus and tracked Pintails after they departed outbreak locations. Eight of 66 (12.1%) Northern Pintails marked with satellite transmitters used wetlands in Japan where the H5N1 virus was detected in Whooper Swans. Apparent survival did not differ between Pintails that used H5N1 sites and those that did not. However, the proportion of Pintails that migrated from Japan was significantly lower among birds that used H5N1 sites compared with those that did not (0.50 vs. 0.79). Northern Pintails were present at the H5N1 sites from 1 to 88 days, with five birds present at the sites from 0 to 7 days prior to detection of the virus in Swans. The six Pintails observed to depart H5N1 sites did so within 2-77 days of the reported outbreaks and moved between 6 and 1200 km within 4 days of departure. Four Pintails migrated to eastern Russia. After their departure from outbreak sites, Northern Pintails made long-distance migrations within the period when newly infected ducks would shed the H5N1 virus. This supports a hypothesized mechanism by which a highly pathogenic avian influenza virus could be spread by migratory birds.
John M Pearce - One of the best experts on this subject based on the ideXlab platform.
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variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in japan
Journal of Avian Biology, 2011Co-Authors: Jerry W Hupp, Paul L. Flint, John M Pearce, Andrew M Ramey, Noriyuki Yamaguchi, Tetsuo Shimada, Kenichi Tokita, Sergei Kharitonov, Hiroyoshi HiguchiAbstract:In North America, spring migration routes and breeding distribution of northern pintails Anas acuta vary because some individuals opportunistically nest at mid-latitudes in years when ephemeral prairie wetlands are available, whereas others regularly nest in arctic and sub-arctic regions where wetland abundance is more constant. Less was known about migration routes and breeding distribution of pintails in East Asia. From 2007–2009 we marked 198 pintails on their wintering areas in Japan with satellite transmitters to: 1) document spring migration routes and summer distribution, 2) evaluate migratory connections and breeding season sympatry with North American pintails, and 3) determine if pintails used the same migration routes in fall as in spring. Most pintails (67%) migrated to the Kamchatka or Chukotka peninsulas in eastern Russia either directly from Japan or via Sakhalin Island, Russia. Remaining pintails primarily migrated to the Magadan region or Kolyma River Basin in eastern Russia via Sakhalin Island. The Chukotka Peninsula was the most common summer destination, with highest densities in the Anadyr Lowlands; a region also used by pintails that migrate from North America. One pintail migrated to St. Lawrence Island, Alaska, in spring and another briefly migrated to the western coast of Alaska in fall. Autumn migration routes generally mirrored spring migration although most pintails bypassed Sakhalin Island in fall. Compared to North American pintails, pintails that winter in Japan exhibited less variation in migration routes and breeding distribution, and nested at higher latitudes. In the Russian Far East there is no region with habitats comparable in extent to the ephemeral mid-latitude wetlands of North America. Consequently, East Asian pintails mainly nest in arctic and sub-arctic regions where annual consistency in wetlands promotes constancy in migration routes and breeding distribution. Breeding season sympatry between pintails from different continents results more from North American pintails migrating to eastern Russia than from Japanese pintails migrating to North America.
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intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails Anas acuta in alaska examining the evidence through space and time
Virology, 2010Co-Authors: Andrew M Ramey, Paul L. Flint, Christian J. Franson, John M Pearce, Dirk V Derksen, Bradley D Scotton, Michael J Petrula, Kristine M Sowl, Michael L Wege, Kimberly A TrustAbstract:Migration and population genetic data for northern pintails (Anas acuta) and phylogenetic analysis of low pathogenic avian influenza (LPAI) viruses from this host in Alaska suggest that northern pintails are involved in ongoing intercontinental transmission of avian influenza. Here, we further refine this conclusion through phylogenetic analyses which demonstrate that detection of foreign lineage gene segments is spatially dependent and consistent through time. Our results show detection of foreign lineage gene segments to be most likely at sample locations on the Alaska Peninsula and least likely along the Southern Alaska Coast. Asian lineages detected at four gene segments persisted across years, suggesting maintenance in avian hosts that migrate to Alaska each year from Asia or in hosts that remain in Alaska throughout the year. Alternatively, live viruses may persist in the environment and re-infect birds in subsequent seasons.
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satellite tracking of northern pintail Anas acuta during outbreaks of the h5n1 virus in japan implications for virus spread
Ibis, 2010Co-Authors: Noriyuki Yamaguchi, Paul L. Flint, Jerry W Hupp, Hiroyoshi Higuchi, John M PearceAbstract:We fitted Northern Pintail Anas acuta in Japan with satellite transmitters and monitored their spring migration movements relative to locations where the highly pathogenic H5N1 avian influenza virus was detected in Whooper Swans Cygnus cygnus in 2008. Pintails were assumed not to be infected with the H5N1 virus at the time they were marked because capture occurred between 2 and 5 months before reported outbreaks of the virus in Japan. We assessed spatial and temporal overlap between marked birds and occurrence of the virus and tracked Pintails after they departed outbreak locations. Eight of 66 (12.1%) Northern Pintails marked with satellite transmitters used wetlands in Japan where the H5N1 virus was detected in Whooper Swans. Apparent survival did not differ between Pintails that used H5N1 sites and those that did not. However, the proportion of Pintails that migrated from Japan was significantly lower among birds that used H5N1 sites compared with those that did not (0.50 vs. 0.79). Northern Pintails were present at the H5N1 sites from 1 to 88 days, with five birds present at the sites from 0 to 7 days prior to detection of the virus in Swans. The six Pintails observed to depart H5N1 sites did so within 2-77 days of the reported outbreaks and moved between 6 and 1200 km within 4 days of departure. Four Pintails migrated to eastern Russia. After their departure from outbreak sites, Northern Pintails made long-distance migrations within the period when newly infected ducks would shed the H5N1 virus. This supports a hypothesized mechanism by which a highly pathogenic avian influenza virus could be spread by migratory birds.
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breeding season sympatry facilitates genetic exchange among allopatric wintering populations of northern pintails in japan and california
The Condor, 2009Co-Authors: Paul L. Flint, Joseph P. Fleskes, John M Pearce, Hiroyoshi Higuchi, Kiyoaki Ozaki, Brian M Guzzetti, Tetsuo Shimada, Dirk V DerksenAbstract:Abstract. The global redistribution of pathogens, such as highly pathogenic avian influenza, has renewed interest in the connectivity of continental populations of birds. Populations of the Northern Pintail (Anas acuta) wintering in Japan and California are considered separate from a management perspective. We used data from band recoveries and population genetics to assess the degree of biological independence of these wintering populations. Distributions of recoveries in Russia of Northern Pintails originally banded during winter in North America overlapped with distributions of Northern Pintails banded during winter in Japan. Thus these allopatric wintering populations are partially sympatric during the breeding season. The primary areas of overlap were along the Chukotka and Kamchatka peninsulas in Russia. Furthermore, band recoveries demonstrated dispersal of individuals between wintering populations both from North America to Japan and vice versa. Genetic analyses of samples from both wintering popu...
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avian influenza at both ends of a migratory flyway characterizing viral genomic diversity to optimize surveillance plans for north america
Evolutionary Applications, 2009Co-Authors: John M Pearce, Joseph P. Fleskes, Paul L. Flint, Christian J. Franson, Anson V Koehler, Andrew M Ramey, Jeffrey S Hall, Dirk V DerksenAbstract:Although continental populations of avian influenza viruses are genetically distinct, transcontinental reassortment in low pathogenic avian influenza (LPAI) viruses has been detected in migratory birds. Thus, genomic analyses of LPAI viruses could serve as an approach to prioritize species and regions targeted by North American surveillance activities for foreign origin highly pathogenic avian influenza (HPAI). To assess the applicability of this approach, we conducted a phylogenetic and population genetic analysis of 68 viral genomes isolated from the northern pintail (Anas acuta) at opposite ends of the Pacific migratory flyway in North America. We found limited evidence for Asian LPAI lineages on wintering areas used by northern pintails in California in contrast to a higher frequency on breeding locales of Alaska. Our results indicate that the number of Asian LPAI lineages observed in Alaskan northern pintails, and the nucleotide composition of LPAI lineages, is not maintained through fall migration. Accordingly, our data indicate that surveillance of Pacific Flyway northern pintails to detect foreign avian influenza viruses would be most effective in Alaska. North American surveillance plans could be optimized through an analysis of LPAI genomics from species that demonstrate evolutionary linkages with European or Asian lineages and in regions that have overlapping migratory flyways with areas of HPAI outbreaks.
Andrew M Ramey - One of the best experts on this subject based on the ideXlab platform.
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evidence for intercontinental parasite exchange through molecular detection and characterization of haematozoa in northern pintails Anas acuta sampled throughout the north pacific basin
International journal for parasitology. Parasites and wildlife, 2015Co-Authors: Joseph P. Fleskes, Joel A. Schmutz, Andrew M Ramey, John A Reed, Go Fujita, Bradley D Scotton, Bruce Casler, Kan Konishi, Kiyoshi UchidaAbstract:Empirical evidence supports wild birds as playing a role in the interhemispheric exchange of bacteria and viruses; however, data supporting the redistribution of parasites among continents are limited. In this study, the hypothesis that migratory birds contribute to the redistribution of parasites between continents was tested by sampling northern pintails (Anas acuta) at locations throughout the North Pacific Basin in North America and East Asia for haemosporidian infections and assessing the genetic evidence for parasite exchange. Of 878 samples collected from birds in Alaska (USA), California (USA), and Hokkaido (Japan) during August 2011–May 2012 and screened for parasitic infections using molecular techniques, Leucocytozoon, Haemoproteus, and Plasmodium parasites were detected in 555 (63%), 44 (5%), and 52 (6%) samples, respectively. Using an occupancy modeling approach, the probability of detecting parasites via replicate genetic tests was estimated to be high (ρ > 0.95). Multi-model inference supported variation of Leucocytozoon parasite prevalence by northern pintail age class and geographic location of sampling in contrast to Haemoproteus and Plasmodium parasites for which there was only support for variation in parasite prevalence by sampling location. Thirty-one unique mitochondrial DNA haplotypes were detected among haematozoa infecting northern pintails including seven lineages shared between samples from North America and Japan. The finding of identical parasite haplotypes at widely distributed geographic locations and general lack of genetic structuring by continent in phylogenies for Leucocytozoon and Plasmodium provides evidence for intercontinental genetic exchange of haemosporidian parasites. Results suggest that migratory birds, including waterfowl, could therefore facilitate the introduction of avian malaria and other haemosporidia to novel hosts and spatially distant regions.
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antibodies to h5 subtype avian influenza virus and japanese encephalitis virus in northern pintails Anas acuta sampled in japan
Japanese Journal of Veterinary Research, 2013Co-Authors: Andrew M Ramey, John A Reed, Go Fujita, Kan Konishi, Kiyoshi Uchida, Erica Spackman, Jung Yong Yeh, Benjamin R Wilcox, Justin C Brown, David E StallknechtAbstract:Blood samples from 105 northern pintails (Anas acuta) captured on Hokkaido, Japan were tested for antibodies to avian influenza virus (AIV), Japanese encephalitis virus (JEV), and West Nile virus (WNV) to assess possible involvement of this species in the spread of economically important and potentially zoonotic pathogens. Antibodies to AIV were detected in 64 of 105 samples (61%). Of the 64 positives, 95% and 81% inhibited agglutination of two different H5 AIV antigens (H5N1 and H5N9), respectively. Antibodies to JEV and WNV were detected in five (5%) and none of the samples, respectively. Results provide evidence for prior exposure of migrating northern pintails to H5 AIV which couldhave implications for viral shedding and disease occurrence. Results also provide evidence for limited involvement of this species in the transmission and spread of flaviviruses during spring migration.
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evaluation of blood and muscle tissues for molecular detection and characterization of hematozoa infections in northern pintails Anas acuta wintering in california
International journal for parasitology. Parasites and wildlife, 2013Co-Authors: Andrew M Ramey, Joseph P. Fleskes, Joel A. Schmutz, Michael J YabsleyAbstract:Information on the molecular detection of hematozoa from different tissue types and multiple years would be useful to inform sample collection efforts and interpret results of meta-analyses or investigations spanning multiple seasons. In this study, we tested blood and muscle tissue collected from northern pintails (Anas acuta) during autumn and winter of different years to evaluate prevalence and genetic diversity of Leucocytozoon, Haemoproteus, and Plasmodium infections in this abundant waterfowl species of the Central Valley of California. We first compared results for paired blood and wing muscle samples to assess the utility of different tissue types for molecular investigations of haemosporidian parasites. Second, we explored inter-annual variability of hematozoa infection in Central Valley northern pintails and investigated possible effects of age, sex, and sub-region of sample collection on estimated parasite detection probability and prevalence. We found limited evidence for differences between tissue types in detection probability and prevalence of Leucocytozoon, Haemoproteus, and Plasmodium parasites, which supports the utility of both sample types for obtaining information on hematozoan infections. However, we detected 11 haemosporidian mtDNA cyt b haplotypes in blood samples vs. six in wing muscle tissue collected during the same sample year suggesting an advantage to using blood samples for investigations of genetic diversity. Estimated prevalence of Leucocytozoon parasites was greater during 2006–2007 as compared to 2011–2012 and four unique haemosporidian mtDNA cyt b haplotypes were detected in the former sample year but not in the latter. Seven of 15 mtDNA cyt b haplotypes detected in northern pintails had 100% identity with previously reported hematozoa lineages detected in waterfowl (Haemoproteus and Leucocytozoon) or other avian taxa (Plasmodium) providing support for lack of host specificity for some parasite lineages.
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variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in japan
Journal of Avian Biology, 2011Co-Authors: Jerry W Hupp, Paul L. Flint, John M Pearce, Andrew M Ramey, Noriyuki Yamaguchi, Tetsuo Shimada, Kenichi Tokita, Sergei Kharitonov, Hiroyoshi HiguchiAbstract:In North America, spring migration routes and breeding distribution of northern pintails Anas acuta vary because some individuals opportunistically nest at mid-latitudes in years when ephemeral prairie wetlands are available, whereas others regularly nest in arctic and sub-arctic regions where wetland abundance is more constant. Less was known about migration routes and breeding distribution of pintails in East Asia. From 2007–2009 we marked 198 pintails on their wintering areas in Japan with satellite transmitters to: 1) document spring migration routes and summer distribution, 2) evaluate migratory connections and breeding season sympatry with North American pintails, and 3) determine if pintails used the same migration routes in fall as in spring. Most pintails (67%) migrated to the Kamchatka or Chukotka peninsulas in eastern Russia either directly from Japan or via Sakhalin Island, Russia. Remaining pintails primarily migrated to the Magadan region or Kolyma River Basin in eastern Russia via Sakhalin Island. The Chukotka Peninsula was the most common summer destination, with highest densities in the Anadyr Lowlands; a region also used by pintails that migrate from North America. One pintail migrated to St. Lawrence Island, Alaska, in spring and another briefly migrated to the western coast of Alaska in fall. Autumn migration routes generally mirrored spring migration although most pintails bypassed Sakhalin Island in fall. Compared to North American pintails, pintails that winter in Japan exhibited less variation in migration routes and breeding distribution, and nested at higher latitudes. In the Russian Far East there is no region with habitats comparable in extent to the ephemeral mid-latitude wetlands of North America. Consequently, East Asian pintails mainly nest in arctic and sub-arctic regions where annual consistency in wetlands promotes constancy in migration routes and breeding distribution. Breeding season sympatry between pintails from different continents results more from North American pintails migrating to eastern Russia than from Japanese pintails migrating to North America.
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intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails Anas acuta in alaska examining the evidence through space and time
Virology, 2010Co-Authors: Andrew M Ramey, Paul L. Flint, Christian J. Franson, John M Pearce, Dirk V Derksen, Bradley D Scotton, Michael J Petrula, Kristine M Sowl, Michael L Wege, Kimberly A TrustAbstract:Migration and population genetic data for northern pintails (Anas acuta) and phylogenetic analysis of low pathogenic avian influenza (LPAI) viruses from this host in Alaska suggest that northern pintails are involved in ongoing intercontinental transmission of avian influenza. Here, we further refine this conclusion through phylogenetic analyses which demonstrate that detection of foreign lineage gene segments is spatially dependent and consistent through time. Our results show detection of foreign lineage gene segments to be most likely at sample locations on the Alaska Peninsula and least likely along the Southern Alaska Coast. Asian lineages detected at four gene segments persisted across years, suggesting maintenance in avian hosts that migrate to Alaska each year from Asia or in hosts that remain in Alaska throughout the year. Alternatively, live viruses may persist in the environment and re-infect birds in subsequent seasons.