The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Abdul Hamid Ahmad - One of the best experts on this subject based on the ideXlab platform.
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a survey of Acarine ectoparasites of bats chiroptera in malaysia
Journal of Medical Entomology, 2013Co-Authors: Mariana Ahamad, Halimaton Ibrahim, Mohd Kulaimi Bujang, Shahrulanuar Mohd Sah, Norzalipah Mohamad, Shukor Mohd Nor, Abdul Hamid AhmadAbstract:A comprehensive 8-yr survey of Acarine ectoparasites (ticks and mites) of bats was carried out in 18 localities from 2002 to 2009. Most of the surveys were conducted during 14 national biodiversity scientific expeditions throughout Malaysia. The objective was to identify Acarines of known public health importance from bats and thus determine whether there is any potential public health risk in Malaysia. Trapping of bats was conducted using Harp traps and Mist nets. In total, 1,579 individuals comprising of 6 families and 52 species of bats were examined alive. In general, 25.6% of the bats were infested with Acarines. Infestation rates of ticks, mesostigmatid mites, and chiggers on bats examined were 0.4, 10.4, and 14.7%, respectively. Their prevalence and mean intensity were tabulated. Genera of ticks extracted were Amblyomma, Dermacentor, Ixodes, and Ornithodoros. Of these genera, only two species can be identified to species level and they are Amblyomma cordiferum and Ixodes simplex. In total, 8 genera and 15 species of mesostigmatid mites were found; the species were Ancystropus eonycteris, Ancystropus zeleborii, Echinonysus nasutus, Laelaps aingworthae, Laelaps nuttalli, Laelaps sanguisugus, Laelaps sculpturatus, Longolaelaps longulus, Longolaelaps whartonii, Meristaspis lateralis, Meristaspis macroglossi, Paraperiglischrus rhinolophinus, Spinturnix acuminatus, Spinturnix americanus, and Spinturnix bakeri. Chiggers on bats were represented by 12 genera and 6 species; the species identified were Gahrliepia fletcheri, Riedlinia lipoxena, Trombigastia cadei, Walchiella impar, Walchiella oudemansi, and Whartonia caobangensis. The study produced an up-to-date list of Acarine ectoparasites of bats in Malaysia where a total of 38 genera and 47 species of Acarines were listed. Findings of the study demonstrated that 5 genera and 1 species of Acarines that may pose potential health risks, can be found on bats.
Peter E A Teal - One of the best experts on this subject based on the ideXlab platform.
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three halloween genes from the varroa mite varroa destructor anderson trueman and their expression during reproduction
Insect Molecular Biology, 2015Co-Authors: Ana R Cabrera, Paul D Shirk, Jay D Evans, K Hung, James W Sims, Hans T Alborn, Peter E A TealAbstract:The ecdysteroid biosynthetic pathway involves sequential enzymatic hydroxylations by a group of enzymes collectively known as Halloween gene proteins. Complete sequences for three Halloween genes, spook (Vdspo), disembodied (Vddib) and shade (Vdshd), were identified in varroa mites and sequenced. Phylogenetic analyses of predicted amino acid sequences for Halloween orthologues showed that the Acarine orthologues were distantly associated with insect and crustacean clades indicating that Acarine genes had more ancestral characters. The lack of orthologues or pseudogenes for remaining genes suggests these pathway elements had not evolved in ancestral arthropods. Vdspo transcript levels were highest in gut tissues, while Vddib transcript levels were highest in ovary-lyrate organs. In contrast, Vdshd transcript levels were lower overall but present in both gut and ovary-lyrate organs. All three transcripts were present in eggs removed from gravid female mites. A brood cell invasion assay was developed for acquiring synchronously staged mites. Mites within 4 h of entering a brood cell had transcript levels of all three that were not significantly different from mites on adult bees. These analyses suggest that varroa mites may be capable of modifying 7-dehydro-cholesterol precursor and hydroxylations of other steroid precursors, but whether the mites directly produce ecdysteroid precursors and products remains undetermined.
R. E. Griffin - One of the best experts on this subject based on the ideXlab platform.
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Species richness and biogeography of non-Acarine arachnids in Namibia
Biodiversity & Conservation, 1998Co-Authors: R. E. GriffinAbstract:A total of 821 species, 296 genera, and 69 families of non-Acarine arachnids (Araneae, Solifugae, Scorpiones, Pseudoscorpiones, Opiliones and Amblypygi) are presently known from Namibia. Patterns of spider, solifuge and scorpion species richness and endemism are summarized relative to the 14 major Namibian types of vegetation. Spiders are most speciose in the higher rainfall areas, solifuges in the dry areas, and scorpions in rocky areas. Namibia probably has the world's greatest diversity of solifuges. Many arachnids endemic to Namibia are associated with the Namib Desert sand dunes.
Mariana Ahamad - One of the best experts on this subject based on the ideXlab platform.
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a survey of Acarine ectoparasites of bats chiroptera in malaysia
Journal of Medical Entomology, 2013Co-Authors: Mariana Ahamad, Halimaton Ibrahim, Mohd Kulaimi Bujang, Shahrulanuar Mohd Sah, Norzalipah Mohamad, Shukor Mohd Nor, Abdul Hamid AhmadAbstract:A comprehensive 8-yr survey of Acarine ectoparasites (ticks and mites) of bats was carried out in 18 localities from 2002 to 2009. Most of the surveys were conducted during 14 national biodiversity scientific expeditions throughout Malaysia. The objective was to identify Acarines of known public health importance from bats and thus determine whether there is any potential public health risk in Malaysia. Trapping of bats was conducted using Harp traps and Mist nets. In total, 1,579 individuals comprising of 6 families and 52 species of bats were examined alive. In general, 25.6% of the bats were infested with Acarines. Infestation rates of ticks, mesostigmatid mites, and chiggers on bats examined were 0.4, 10.4, and 14.7%, respectively. Their prevalence and mean intensity were tabulated. Genera of ticks extracted were Amblyomma, Dermacentor, Ixodes, and Ornithodoros. Of these genera, only two species can be identified to species level and they are Amblyomma cordiferum and Ixodes simplex. In total, 8 genera and 15 species of mesostigmatid mites were found; the species were Ancystropus eonycteris, Ancystropus zeleborii, Echinonysus nasutus, Laelaps aingworthae, Laelaps nuttalli, Laelaps sanguisugus, Laelaps sculpturatus, Longolaelaps longulus, Longolaelaps whartonii, Meristaspis lateralis, Meristaspis macroglossi, Paraperiglischrus rhinolophinus, Spinturnix acuminatus, Spinturnix americanus, and Spinturnix bakeri. Chiggers on bats were represented by 12 genera and 6 species; the species identified were Gahrliepia fletcheri, Riedlinia lipoxena, Trombigastia cadei, Walchiella impar, Walchiella oudemansi, and Whartonia caobangensis. The study produced an up-to-date list of Acarine ectoparasites of bats in Malaysia where a total of 38 genera and 47 species of Acarines were listed. Findings of the study demonstrated that 5 genera and 1 species of Acarines that may pose potential health risks, can be found on bats.
Perezponce G De Leon - One of the best experts on this subject based on the ideXlab platform.
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Acarine infracommunities associated with the mexican free tailed bat tadarida brasiliensis mexicana chiroptera molossidae in arid regions of mexico
Journal of Medical Entomology, 2003Co-Authors: Carmen Guzmancornejo, Juan B Moralesmalacara, Luis Garciaprieto, Perezponce G De LeonAbstract:The Mexican free-tailed bat, Tadarida brasiliensis mexicana, is one of the most widely distributed bats, and its range includes the whole Mexican territory. Ectoparasites of this bat have been the subject of isolated reports, but no studies of its community ecology have been conducted. The Acarine infracommunities associated with this bat were analyzed, comparing bat populations from three arid regions of Mexico: an abandoned factory in Nombre de Dios, Durango; a cave in Santiago, Nuevo Leon; and a church in Concepcion del Oro, Zacatecas. The Acarine infracommunity in Nuevo Le6n's bats exhibited the highest levels of diversity as reflected by a higher richness, a lower dominance, and a moderate and relatively homogeneous abundance in this locality in relation to the other two. This pattern is influenced by stable cave conditions relative to artificial habitats. Notwithstanding, further studies are required to determine whether or not different habitat conditions are a primary factor in the process of structuring the acari infracommunities.
