Document Detail

Effect of management and inherent factors on birth seropositivity and seroconversion to Babesia bovis in calves in Costa Rica.
MedLine Citation:
PMID:  8784491     Owner:  NLM     Status:  MEDLINE    
The relationship between calf characteristics, farm management, seropositivity, and age at seroconversion to Babesia bovis was assessed. A total of 3624 samples obtained from 494 animals on 11 farms was analyzed by an indirect ELISA assay, and individual results classified as positive or negative. The animals were sampled from birth to weaning, beginning in April 1990 and ending in April 1992. We found 59.1% (n = 467) of seropositive neonatal calves (mean age 4.4 days). Using a logistic binomial regression model as the analytical method for predicting the likelihood of calf seropositivity, we found that the following factors were related to seroconversion at birth: time to colostrum consumption, place of birth, calving history, parity (number of lactations), and ecological life zone. To analyze the effect of management factors on time to seroconversion, we used the Proportional Hazards method. In this model the pattern of seroconversion was different for the type of production system. Calves from dual-purpose farms seroconverted earlier than calves from cow-calf farms.
E Pérez; M Jaén; M V Herrero
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Annals of the New York Academy of Sciences     Volume:  791     ISSN:  0077-8923     ISO Abbreviation:  Ann. N. Y. Acad. Sci.     Publication Date:  1996 Jul 
Date Detail:
Created Date:  1996-10-18     Completed Date:  1996-10-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7506858     Medline TA:  Ann N Y Acad Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  100-9     Citation Subset:  IM    
Regional Graduate Program in Tropical Veterinary Sciences, School of Veterinary Medicine, Universidad Nacional, Costa Rica.
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MeSH Terms
Animals, Newborn
Babesia bovis* / isolation & purification
Babesiosis / diagnosis,  epidemiology*,  prevention & control
Cattle Diseases*
Colostrum / microbiology
Costa Rica / epidemiology
Enzyme-Linked Immunosorbent Assay
Milk / microbiology
Proportional Hazards Models
Regression Analysis
Risk Factors
Serologic Tests

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

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