Seroprevalence of infectious bovine rhinotracheitis in organized dairy farms of India

In this study, a systematic sero-surveillance of IBR was undertaken from 11 dairy farms located in 4 different regions of India. A total of 1000 cattle serum samples were tested for the presence of antibodies against IBR using Avidin Biotin ELISA. The results revealed that IBR antibodies were widely prevalent in all regions of the country ranging from 36.5% in Central region to 84.5% in Northern region with an overall prevalence of 61.6%. The prevalence of IBR antibodies was different between various age groups being 22.3%, 62.1%, 59.3%, 76.1% and 66.78 % in the age groups less than 1 year, 1-2 years, 2-3 years, 3-4 years and more than 4 years old respectively. Based upon the medical history of the herd, it was found that 83% abortion cases, 76% metritis cases, 83% repeat breeding cases and 65% retention of placenta cases were seropositive for IBR.