Previous reports from the U.S., China, and Japan…Bucepivirus alone detected in many calf diarrhea samples
Reporter Sangjun Yoon [email protected]
Neonatal calf diarrhea is one of the major diseases that threaten cattle farms. Bucepivirus is a new causative agent that can cause calf diarrhea in Korea.(Boosepivirus)was detected.
Dr. Chae Jeong-byeong (Advisor Chae Jun-seok) of Seoul National University College of Veterinary Medicine published the results of a study on detecting Bucepivirus in diarrhea samples from domestic Korean beef calves in the Journal of Veterinary Science (JVS), an international journal of the Korean Veterinary Association, in September.
Calf diarrhea is caused by various pathogens such as bacteria, viruses, and parasites. The researchers focused on Bucepivirus, saying, “There are several cases of calf diarrhea in which no pathogen was found.” Bucepivirus has been reported in calf diarrhea in China, the United States, and Japan.
In September 2022, the researchers announced that bovine rotavirus (BRV), bovine coronavirus (BCV), bovine viral diarrhea virus (BVDV),(Cryptosporidium parvum)Giardia lamblia(Giardia)Metagenomic sequencing was performed on calf diarrhea samples that tested negative for Eimeria, and the busepivirus gene was discovered.
Using this as an opportunity, Bucepivirus was searched for 70 calf diarrhea samples from 13 Korean beef farms distributed across Gyeonggi, Chungnam, Jeonbuk, and Gyeongnam.
As a result, Bucepivirus was detected in 25 cases, recording the highest detection rate (35.7%). This was followed by rotavirus (18.6%) and BVD (5.7%). At the farm level, Bucepivirus was the most prevalent pathogen, found in 10 of the 13 farms.
Of the 25 diarrhea samples in which Bucepivirus was found, Bucepivirus was detected alone in 20 cases.
Pathogens isolated from 70 calf diarrhea samples from 13 Korean beef farms
The researchers said, “The detection rate of Bucepivirus was higher than that of other pathogens,” and “Although the number of samples was limited, the fact that most positive cases of Bucepivirus were isolated infections suggests that Bucepivirus plays an important role in causing diarrheal disease in calves. “He explained.
In addition, as cases of Bucepivirus co-infection with other pathogens were observed, the possibility was raised that the severity of calf diarrhea could increase due to complex infections.
However, he cited the fact that the pathogenicity could not be confirmed by directly isolating the Bucepivirus as a limitation, and suggested that additional research was needed to isolate the virus and determine the disease mechanism.
This is the result of the identification of a new bovine picornavirus (Boosepivirus) in the Republic of Korea JVS homepageYou can check it here.
