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E T Lyons - One of the best experts on this subject based on the ideXlab platform.
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epidemiology of Hookworm uncinaria spp infection in new zealand hooker s sea lion phocarctos hookeri pups on enderby island auckland islands new zealand during the breeding seasons from 1999 2000 to 2004 2005
Parasitology Research, 2007Co-Authors: A Castinel, E T Lyons, W E Pomroy, N J Gibbs, N Lopezvillalobos, B L Chilvers, I S WilkinsonAbstract:This is the first investigation of the epidemiology of Hookworm (Uncinaria spp.) infection in New Zealand sea lions (NZSLs; Phocarctos hookeri) on Enderby Island, Auckland Islands. The examination of faeces for Hookworm eggs in various age categories of sea lions revealed that only pups up to at least 3 months of age harboured adult Hookworms in their intestines. Gross necropsy of more than 400 pups from 1999/2000 to 2004/2005 showed that the prevalence of Hookworm infection varied significantly between years and was higher from mid-January to the end of February when the majority of pups were between 3 and 9 weeks old. The average burden of adult parasites per pup was not influenced by the host’s sex and body condition or by year. This study also provided evidence for transmission occurring by the transmammary route in NZSLs.
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First report and characterization of adult Uncinaria spp. in New Zealand Sea Lion (Phocarctos hookeri) pups from the Auckland Islands, New Zealand
Parasitology Research, 2006Co-Authors: A Castinel, E T Lyons, W E Pomroy, I S Wilkinson, P. J. Duignan, S. A. Nadler, M. D. Dailey, B L ChilversAbstract:Two species of Hookworms ( Uncinaria lucasi and Uncinaria hamiltoni ) have been formally described from pinnipeds, but dissimilar types are noted from these hosts. This report is the first description of Hookworms ( Uncinaria spp.) from the New Zealand sea lion, Phocarctos hookeri. The nematodes were collected from dead pups on Enderby Island (Auckland Islands, 50°30', 166°17') during January and February, 2004. Standard measurements of male and female Hookworms were obtained, providing a general morphometric characterization of the Hookworm species in P. hookeri. Considerable variations in the body length of adult Hookworms were noted within the same host. The arrangement of some of the bursal rays differs from that described for U. lucasi and U. hamiltoni .
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historic importance of some aspects of research by o wilford olsen on Hookworms uncinaria lucasi in northern fur seals callorhinus ursinus and steller sea lions eumatopias jubatus in 1951 on st paul island alaska
Parasitology Research, 2005Co-Authors: E T LyonsAbstract:The purpose of this paper is to disseminate, more widely, certain historically important aspects of research by O. Wilford Olsen on Hookworms (Uncinaria lucasi) in northern fur seals (Callorhinus ursinus) and Steller sea lions (Eumatopias jubatus) in 1951 on St. Paul Island, Alaska. Highly meaningful facets of the research were recorded only in a report with limited availability by Olsen in 1952. Portions of his research presented here include measurements of Hookworm free-living infective third-stage larvae (L3) and adults, photographs of bursae, and the conclusion that the species of Hookworms (U. lucasi) is probably the same in both pinniped hosts. This information is especially important because very little has been published on taxonomy of Hookworms in E. jubatus.
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historic importance of some aspects of research by o wilford olsen on Hookworms uncinaria lucasi in northern fur seals callorhinus ursinus and steller sea lions eumatopias jubatus in 1951 on st paul island alaska
Parasitology Research, 2005Co-Authors: E T LyonsAbstract:The purpose of this paper is to disseminate, more widely, certain historically important aspects of research by O. Wilford Olsen on Hookworms (Uncinaria lucasi) in northern fur seals (Callorhinus ursinus) and Steller sea lions (Eumatopias jubatus) in 1951 on St. Paul Island, Alaska. Highly meaningful facets of the research were recorded only in a report with limited availability by Olsen in 1952. Portions of his research presented here include measurements of Hookworm free-living infective third-stage larvae (L3) and adults, photographs of bursae, and the conclusion that the species of Hookworms (U. lucasi) is probably the same in both pinniped hosts. This information is especially important because very little has been published on taxonomy of Hookworms in E. jubatus.
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current prevalence of adult uncinaria spp in northern fur seal callorhinus ursinus and california sea lion zalophus californianus pups on san miguel island california with notes on the biology of these Hookworms
Veterinary Parasitology, 2001Co-Authors: Robert L Delong, Sharon R. Melin, Anthony J Orr, E T Lyons, S C TolliverAbstract:A prevalence survey for Hookworms (Uncinaria spp.) was done in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, CA, in 2000. Intestines of dead pups were examined for adult Hookworms in July. These parasites were found in 95% of 20 fur seal pups and 100% of 31 sea lion pups. The number of Hookworms varied from 4 to 2142 (mean = 760) in fur seal pups and from 20 to 2634 (mean = 612) in sea lion pups. A direct relationship was evident between body condition and number of Hookworms in the pups; that is, pups in poor condition had fewer Hookworms than those in good condition. There was a decline in the number of Hookworms in sea lion pups in 2000 compared to collections in 1996. Eggs of Uncinaria spp. were found in rectal feces (collected in late September and early October) of none of 35 (0%) live fur seal pups and 41 of 48 (85%) live sea lion pups. Packed cell volume values, determined for most of the same live pups, were essentially normal for C. ursinus but were much lower than normal for most Z. californianus. Hookworm larvae were not found in blubber of fur seal and sea lion pups or in rookery sand in July. Rookery sand, positive for live Hookworm larvae when put in a refrigerator, was negative at removal 2.5 years later. The average number of eggs in utero of female Hookworms was 285 for three specimens from a fur seal pup and 281 from three specimens from a sea lion pup. One Hookworm larva was recovered from milk stripped from the teats of a stranded Z. californianus female at The Marine Mammal Center, Sausalito, CA.
Robert L Delong - One of the best experts on this subject based on the ideXlab platform.
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parasitological examination of northern elephant seal mirounga angustirostris pups for presence of Hookworms uncinaria spp on san miguel island california
Helminthologia, 2016Co-Authors: Tatiana A Kuzmina, Terry R Spraker, Robert L DelongAbstract:Necropsy and extensive parasitological examination of dead northern elephant seal (NES) pups was done on San Miguel Island, California, in February, 2015. The main interest in the current study was to determine if Hookworms were present in NESs on San Miguel Island where two Hookworm species of the genus Uncinaria are known to be present - Uncinaria lyonsi in California sea lions and Uncinaria lucasi in northern fur seals. Hookworms were not detected in any of the NESs examined: stomachs or intestines of 16 pups, blubber of 13 pups and blubber of one bull. The results obtained in the present study of NESs on San Miguel Island plus similar finding on Ano Nuevo State Reserve and The Marine Mammal Center provide strong indication that NES are not appropriate hosts for Uncinaria spp. Hookworm free-living third stage larvae, developed from eggs of California sea lions and northern fur seals, were recovered from sand. It seems that at this time, further search for Hookworms in NESs would be nonproductive.
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current prevalence of adult uncinaria spp in northern fur seal callorhinus ursinus and california sea lion zalophus californianus pups on san miguel island california with notes on the biology of these Hookworms
Veterinary Parasitology, 2001Co-Authors: Sharon R. Melin, Robert L DelongAbstract:Abstract A prevalence survey for Hookworms (Uncinaria spp.) was done in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, CA, in 2000. Intestines of dead pups were examined for adult Hookworms in July. These parasites were found in 95% of 20 fur seal pups and 100% of 31 sea lion pups. The number of Hookworms varied from 4 to 2142 ( x =760 ) in fur seal pups and from 20 to 2634 ( x =612 ) in sea lion pups. A direct relationship was evident between body condition and number of Hookworms in the pups; that is, pups in poor condition had fewer Hookworms than those in good condition. There was a decline in the number of Hookworms in sea lion pups in 2000 compared to collections in 1996. Eggs of Uncinaria spp. were found in rectal feces (collected in late September and early October) of none of 35 (0%) live fur seal pups and 41 of 48 (85%) live sea lion pups. Packed cell volume values, determined for most of the same live pups, were essentially normal for C. ursinus but were much lower than normal for most Z. californianus. Hookworm larvae were not found in blubber of fur seal and sea lion pups or in rookery sand in July. Rookery sand, positive for live Hookworm larvae when put in a refrigerator, was negative at removal 2.5 years later. The average number of eggs in utero of female Hookworms was 285 for three specimens from a fur seal pup and 281 from three specimens from a sea lion pup. One Hookworm larva was recovered from milk stripped from the teats of a stranded Z. californianus female at The Marine Mammal Center, Sausalito, CA.
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current prevalence of adult uncinaria spp in northern fur seal callorhinus ursinus and california sea lion zalophus californianus pups on san miguel island california with notes on the biology of these Hookworms
Veterinary Parasitology, 2001Co-Authors: Robert L Delong, Sharon R. Melin, Anthony J Orr, E T Lyons, S C TolliverAbstract:A prevalence survey for Hookworms (Uncinaria spp.) was done in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, CA, in 2000. Intestines of dead pups were examined for adult Hookworms in July. These parasites were found in 95% of 20 fur seal pups and 100% of 31 sea lion pups. The number of Hookworms varied from 4 to 2142 (mean = 760) in fur seal pups and from 20 to 2634 (mean = 612) in sea lion pups. A direct relationship was evident between body condition and number of Hookworms in the pups; that is, pups in poor condition had fewer Hookworms than those in good condition. There was a decline in the number of Hookworms in sea lion pups in 2000 compared to collections in 1996. Eggs of Uncinaria spp. were found in rectal feces (collected in late September and early October) of none of 35 (0%) live fur seal pups and 41 of 48 (85%) live sea lion pups. Packed cell volume values, determined for most of the same live pups, were essentially normal for C. ursinus but were much lower than normal for most Z. californianus. Hookworm larvae were not found in blubber of fur seal and sea lion pups or in rookery sand in July. Rookery sand, positive for live Hookworm larvae when put in a refrigerator, was negative at removal 2.5 years later. The average number of eggs in utero of female Hookworms was 285 for three specimens from a fur seal pup and 281 from three specimens from a sea lion pup. One Hookworm larva was recovered from milk stripped from the teats of a stranded Z. californianus female at The Marine Mammal Center, Sausalito, CA.
Sharon R. Melin - One of the best experts on this subject based on the ideXlab platform.
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current prevalence of adult uncinaria spp in northern fur seal callorhinus ursinus and california sea lion zalophus californianus pups on san miguel island california with notes on the biology of these Hookworms
Veterinary Parasitology, 2001Co-Authors: Sharon R. Melin, Robert L DelongAbstract:Abstract A prevalence survey for Hookworms (Uncinaria spp.) was done in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, CA, in 2000. Intestines of dead pups were examined for adult Hookworms in July. These parasites were found in 95% of 20 fur seal pups and 100% of 31 sea lion pups. The number of Hookworms varied from 4 to 2142 ( x =760 ) in fur seal pups and from 20 to 2634 ( x =612 ) in sea lion pups. A direct relationship was evident between body condition and number of Hookworms in the pups; that is, pups in poor condition had fewer Hookworms than those in good condition. There was a decline in the number of Hookworms in sea lion pups in 2000 compared to collections in 1996. Eggs of Uncinaria spp. were found in rectal feces (collected in late September and early October) of none of 35 (0%) live fur seal pups and 41 of 48 (85%) live sea lion pups. Packed cell volume values, determined for most of the same live pups, were essentially normal for C. ursinus but were much lower than normal for most Z. californianus. Hookworm larvae were not found in blubber of fur seal and sea lion pups or in rookery sand in July. Rookery sand, positive for live Hookworm larvae when put in a refrigerator, was negative at removal 2.5 years later. The average number of eggs in utero of female Hookworms was 285 for three specimens from a fur seal pup and 281 from three specimens from a sea lion pup. One Hookworm larva was recovered from milk stripped from the teats of a stranded Z. californianus female at The Marine Mammal Center, Sausalito, CA.
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current prevalence of adult uncinaria spp in northern fur seal callorhinus ursinus and california sea lion zalophus californianus pups on san miguel island california with notes on the biology of these Hookworms
Veterinary Parasitology, 2001Co-Authors: Robert L Delong, Sharon R. Melin, Anthony J Orr, E T Lyons, S C TolliverAbstract:A prevalence survey for Hookworms (Uncinaria spp.) was done in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, CA, in 2000. Intestines of dead pups were examined for adult Hookworms in July. These parasites were found in 95% of 20 fur seal pups and 100% of 31 sea lion pups. The number of Hookworms varied from 4 to 2142 (mean = 760) in fur seal pups and from 20 to 2634 (mean = 612) in sea lion pups. A direct relationship was evident between body condition and number of Hookworms in the pups; that is, pups in poor condition had fewer Hookworms than those in good condition. There was a decline in the number of Hookworms in sea lion pups in 2000 compared to collections in 1996. Eggs of Uncinaria spp. were found in rectal feces (collected in late September and early October) of none of 35 (0%) live fur seal pups and 41 of 48 (85%) live sea lion pups. Packed cell volume values, determined for most of the same live pups, were essentially normal for C. ursinus but were much lower than normal for most Z. californianus. Hookworm larvae were not found in blubber of fur seal and sea lion pups or in rookery sand in July. Rookery sand, positive for live Hookworm larvae when put in a refrigerator, was negative at removal 2.5 years later. The average number of eggs in utero of female Hookworms was 285 for three specimens from a fur seal pup and 281 from three specimens from a sea lion pup. One Hookworm larva was recovered from milk stripped from the teats of a stranded Z. californianus female at The Marine Mammal Center, Sausalito, CA.
B L Chilvers - One of the best experts on this subject based on the ideXlab platform.
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epidemiology of Hookworm uncinaria spp infection in new zealand hooker s sea lion phocarctos hookeri pups on enderby island auckland islands new zealand during the breeding seasons from 1999 2000 to 2004 2005
Parasitology Research, 2007Co-Authors: A Castinel, E T Lyons, W E Pomroy, N J Gibbs, N Lopezvillalobos, B L Chilvers, I S WilkinsonAbstract:This is the first investigation of the epidemiology of Hookworm (Uncinaria spp.) infection in New Zealand sea lions (NZSLs; Phocarctos hookeri) on Enderby Island, Auckland Islands. The examination of faeces for Hookworm eggs in various age categories of sea lions revealed that only pups up to at least 3 months of age harboured adult Hookworms in their intestines. Gross necropsy of more than 400 pups from 1999/2000 to 2004/2005 showed that the prevalence of Hookworm infection varied significantly between years and was higher from mid-January to the end of February when the majority of pups were between 3 and 9 weeks old. The average burden of adult parasites per pup was not influenced by the host’s sex and body condition or by year. This study also provided evidence for transmission occurring by the transmammary route in NZSLs.
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First report and characterization of adult Uncinaria spp. in New Zealand Sea Lion (Phocarctos hookeri) pups from the Auckland Islands, New Zealand
Parasitology Research, 2006Co-Authors: A Castinel, E T Lyons, W E Pomroy, I S Wilkinson, P. J. Duignan, S. A. Nadler, M. D. Dailey, B L ChilversAbstract:Two species of Hookworms ( Uncinaria lucasi and Uncinaria hamiltoni ) have been formally described from pinnipeds, but dissimilar types are noted from these hosts. This report is the first description of Hookworms ( Uncinaria spp.) from the New Zealand sea lion, Phocarctos hookeri. The nematodes were collected from dead pups on Enderby Island (Auckland Islands, 50°30', 166°17') during January and February, 2004. Standard measurements of male and female Hookworms were obtained, providing a general morphometric characterization of the Hookworm species in P. hookeri. Considerable variations in the body length of adult Hookworms were noted within the same host. The arrangement of some of the bursal rays differs from that described for U. lucasi and U. hamiltoni .
S C Tolliver - One of the best experts on this subject based on the ideXlab platform.
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current prevalence of adult uncinaria spp in northern fur seal callorhinus ursinus and california sea lion zalophus californianus pups on san miguel island california with notes on the biology of these Hookworms
Veterinary Parasitology, 2001Co-Authors: Robert L Delong, Sharon R. Melin, Anthony J Orr, E T Lyons, S C TolliverAbstract:A prevalence survey for Hookworms (Uncinaria spp.) was done in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, CA, in 2000. Intestines of dead pups were examined for adult Hookworms in July. These parasites were found in 95% of 20 fur seal pups and 100% of 31 sea lion pups. The number of Hookworms varied from 4 to 2142 (mean = 760) in fur seal pups and from 20 to 2634 (mean = 612) in sea lion pups. A direct relationship was evident between body condition and number of Hookworms in the pups; that is, pups in poor condition had fewer Hookworms than those in good condition. There was a decline in the number of Hookworms in sea lion pups in 2000 compared to collections in 1996. Eggs of Uncinaria spp. were found in rectal feces (collected in late September and early October) of none of 35 (0%) live fur seal pups and 41 of 48 (85%) live sea lion pups. Packed cell volume values, determined for most of the same live pups, were essentially normal for C. ursinus but were much lower than normal for most Z. californianus. Hookworm larvae were not found in blubber of fur seal and sea lion pups or in rookery sand in July. Rookery sand, positive for live Hookworm larvae when put in a refrigerator, was negative at removal 2.5 years later. The average number of eggs in utero of female Hookworms was 285 for three specimens from a fur seal pup and 281 from three specimens from a sea lion pup. One Hookworm larva was recovered from milk stripped from the teats of a stranded Z. californianus female at The Marine Mammal Center, Sausalito, CA.