Bovine viral diarrhea virus (BVDV) is a highly contagious viral infection that affects cattle worldwide. It can cause a variety of symptoms, including fever, diarrhea, and respiratory problems. There are several synonyms for this disease that are commonly used in veterinary medicine, including mucosal disease, BVD, bovine viral diarrhea, and pestivirus. These terms are often used interchangeably and refer to the same virus. BVDV is a significant economic concern for cattle producers due to its impact on herd health and productivity. Preventive measures, such as vaccination and biosecurity practices, are essential for controlling the spread of this disease.