A review on viral agents of cattle abortion in Iran

pregnancy wastage is a serious economic problem in the reproductive management of dairy and beef farms. Various agents including genetic disorders, nutritional deficiencies, poisonings, physical injuries and infections cause pregnancy loss in cows. Infectious agents including bacteria, viruses, protozoa and fungi have a significant effect on pregnancy loss of cows. Diagnosis of infectious abortive agents in each region is necessary to control and prevent abortions on farms. The purpose of this study is to review all studies that have investigated viral agents of cattle pregnancy loss in Iran. Therefore, all Persian and English articles on the subject of cattle abortion with viral origin or any of the viruses causing abortion were searched in databases including Scince Direct, Pub Med, Scopus, Google Scholar, Magiran and Iran Doc. All the studies found were placed in the tables for easier analysis. The data of present study indicate that although many studies show a high prevalence of viral infections causing pregnancy loss of cattle including BVD and IBR viruses, but studies investigate their role in pregnancy loss of cattle in Iran are few. These few studies indicate that BVD and IBR viruses have a significant role in causing abortion in cattle in Iran. Only one study has examined the role of Blue tongue virus in bovine abortion in Iran, which no trace of this virus has been found.