The prevalence of bovine virus diarrhea and bovine respiratory syncytial virus in Mexico

Two studies were performed to determine the prevalence of Bovine Virus Diarrhea (BVD) and Bovine Respiratory Syncytial Virus (BRSV) based on the serological evidence of serum neutralizing titers. Cattle from a large dairy farm in Tizayuca, State of Mexico, Mexico, and feeder cattle entering Texas from the southwestern coastal areas of Mexico were studied. The serological results of the dairy farm cattle showed 100% were exposed to BRSV, and 100% were exposed to BVD. Similar exposures were detected in the herd’s calves, with the serology showing 100% exposure to BRSV and 60% to BVD at 1:2 dilution or greater. Exposures were detected in the feeder calves entering Texas, showing 60% exposure to BRSV and 31% exposure to BVD at 1:8 dilution or greater.