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Seroprevalence and risk factors associated with bovine viral diarrhea virus (BVDV) infection in non-vaccinated dairy and dual purpose cattle herds in Ecuador

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Abstract

A cross-sectional study was carried out to determine the seroprevalence and risk factors associated with Bovine viral diarrhea virus (BVDV) infection in non-vaccinated dairy and dual-purpose cattle herds from Ecuador. A total of 2,367 serum samples from 346 herds were collected from June 2008 through February 2009. A questionnaire, which included variables related to cattle, health, management measures, and the environment, was filled out in each herd. A commercial indirect enzyme-linked immunosorbent assay test was used to determine the seropositivity. A logistic regression model was used to determine risk factors at herd level. The individual seroprevalence for BVDV in non-vaccinated herds in Ecuador was 36.2% (857/2,367; CI95%, 34.3–38.1%). The herd prevalence was 74% (256/346; CI95%, 69.4–78.6%) and the intra-herd prevalence ranged between 11.1% and 100% (mean = 51.6%). The logistic regression model showed that the density of cattle farms in the area (more than 70%; OR, 1.94; CI95%, 1.21–3.2) and the altitude (higher than 2,338 m above sea level; 2.33; CI95%, 1.4–3.9) are potential risk factors associated with BVDV infection.

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Acknowledgments

This study was supported by the Universidad Técnica Particular de Loja (UTPL), in Ecuador. We would like to thank the farmers who participated in this study.

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Correspondence to Alfonso Carbonero.

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Saa, L.R., Perea, A., García-Bocanegra, I. et al. Seroprevalence and risk factors associated with bovine viral diarrhea virus (BVDV) infection in non-vaccinated dairy and dual purpose cattle herds in Ecuador. Trop Anim Health Prod 44, 645–649 (2012). https://doi.org/10.1007/s11250-011-9948-4

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