Document Detail

Herd evaluation of Fasciola hepatica infection levels in Louisiana cattle by an enzyme-linked immunosorbent assay.
MedLine Citation:
PMID:  3565887     Owner:  NLM     Status:  MEDLINE    
An enzyme-linked immunosorbent assay (ELISA) was evaluated as a method of determining relative immunoconversion rates in calves and how immunoconversion rates and strength of optical density values correlate with prevalence of Fasciola hepatica fecal egg shedding. Ten to 55 calves and cows were examined from each of 10 separate beef cattle herds in central and southern Louisiana. Infection prevalence rates for calves averaged 8% higher when ELISA optical density values were used than those when fecal egg count data were used. Of 55 calves in 8 herds that were ELISA positive, 39 were shedding F hepatica eggs; of 53 calves that were shedding eggs, 14 were ELISA negative. Significant correlation of calf fecal and ELISA prevalence was observed for 8 herds by linear regression analysis. A chi 2 analysis showed that calf ELISA and fecal egg shedding data were not independent. Results indicate that positive ELISA reactions for as few as 10 to 15 calves from the fall calf crop of a given herd are sufficiently accurate to be used to assess F hepatica herd infection rates, the likelihood of liver condemnations at feedlot destinations, and variation between individual farms in fascioliasis infection risk. The test was less valuable as a diagnostic test when used in adult animals previously exposed to F hepatica or on an individual animal basis.
R D Welch; P H Smith; J B Malone; R A Holmes; J P Geaghan
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  American journal of veterinary research     Volume:  48     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-05-12     Completed Date:  1987-05-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  345-7     Citation Subset:  IM    
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MeSH Terms
Antibodies / analysis*
Antibody Formation
Cattle Diseases / diagnosis*,  immunology
Enzyme-Linked Immunosorbent Assay
Fasciola hepatica / immunology*,  isolation & purification
Fascioliasis / diagnosis,  immunology,  veterinary*
Feces / parasitology
Parasite Egg Count
Predictive Value of Tests
Reg. No./Substance:

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

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