Document Detail


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.
MedLine Citation:
PMID:  11390084     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
E T Lyons; S R Melin; R L DeLong; A J Orr; F M Gulland; S C Tolliver
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Veterinary parasitology     Volume:  97     ISSN:  0304-4017     ISO Abbreviation:  Vet. Parasitol.     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-06-06     Completed Date:  2001-08-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7602745     Medline TA:  Vet Parasitol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  309-18     Citation Subset:  IM    
Affiliation:
Department of Veterinary Science, Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546-0099, USA. elyonsl@pop.uky.edu
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MeSH Terms
Descriptor/Qualifier:
Ancylostomatoidea / isolation & purification*
Animals
Body Burden
California / epidemiology
Feces / parasitology
Female
Hematocrit / veterinary
Hookworm Infections / epidemiology,  veterinary*
Male
Milk / parasitology
Parasite Egg Count / veterinary
Prevalence
Sea Lions / parasitology*
Sex Ratio
Silicon Dioxide
Species Specificity
Chemical
Reg. No./Substance:
7631-86-9/Silicon Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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