Risk Factor Analysis of Bovine Leukemia Virus Infection in Dairy Cattle in Egypt
Comparative Immunology, Microbiology and Infectious Diseases • 2020
Publication Information
Authors
Abdelfattah Selim; Ameer A Megahed; Sahar Kandeel; Abdelhamed Abdelhady
Keywords
BLV; Cattle; Egypt; Risk factor; Seroprevalence.
Journal
Comparative Immunology, Microbiology and Infectious Diseases
Publisher
Not Available
Volume
72
Issue
Not Available
Pages
101517
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Identification of the risk factors associated with Enzootic bovine leukosis (EBL) is essential for the adoption of potentially prevention strategies. Accordingly, our objectives were to determine the geographic distribution of Bovine Leukemia Virus (BLV) infection and identify the risk factors associated with cow-level BLV infection in the Egyptian dairy cattle. A cross-sectional study was conducted on 1299 mixed breed cows distributed over four provinces in the Nile Delta of Egypt in 2018. The randomly selected cows on each farm were serologically tested for BLV, and the cow's information was obtained from the farm records. Four variables (geographic location, herd size, number of parities, and age) were used for risk analysis. A total of 230 serum samples (17.7 %) were serologically positive for BLV. The highest prevalence of BLV infection was associated with parity (OR = 3.4, 95 %CI 2.4-4.9) with 80 % probability of being BLV-positive at parity ≥5, followed by herd size (OR = 1.8, 95 %CI 1.4-2.2). However, geographic location seems to have no impact on the prevalence of BLV infection in Egypt. Our findings strongly indicate that the intensive surveillance and effective prevention strategies against BLV infection in Egypt should be provided to multiparous cows with ≥5 parities and live in large farm with more than 200 cows
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