Detection of bovine leukemia virus in beef cattle kept in the Central Coast Regions of Vietnam

• Published in: Journal of Veterinary Medical Science Vol. 85; no. 1; pp. 111 - 116
• Main Authors: LE, Dung Thi, VU, Hai Van, HAGA, Takeshi, LE, Phung Dinh, DINH, Dung Van, DUONG, Hai Thanh, NGUYEN, Son Vu, KUNIEDA, Tetsuo, NGUYEN, Van Huu, LE, Thu Anh Nu, FUJIMOTO, Yuri
• Format: Journal Article
• Language: English
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 01.01.2023; Japan Science and Technology Agency; The Japanese Society of Veterinary Science
• Subjects: Animals; Beef; beef cattle; bovine leukemia virus; Bovine leukosis; Cattle; Cattle Diseases - epidemiology; Enzootic Bovine Leukosis - epidemiology; Genotype; Genotypes; genotyping; Leukemia Virus, Bovine - genetics; Phylogeny; Vietnam; Vietnam - epidemiology; Virology; Vietnam; beef cattle; Vietnam; bovine leukemia virus; genotyping
• ISSN: 0916-7250; 1347-7439; 1347-7439
• DOI: 10.1292/jvms.22-0240

Bovine leukemia virus (BLV) is the etiologic agent of enzootic bovine leucosis. Our previous study showed the BLV existence in cattle kept in the Red River Delta Region of Vietnam. However, no positive samples were identified in beef cattle. Besides, information related to the BLV circulation in the remained parts of Vietnam is limited. Therefore, we tested the existence of BLV in 48 beef cattle kept in the Central Coast Regions. Nested PCR targeting the BLV-env-gp51 confirmed the prevalence of 14.6% in investigated regions. Phylogenetic analysis suggested the co-existence of genotypes 1 and 10. The close relationship between strains found in Vietnam, Thailand, Myanmar, and China was revealed suggesting the possibility of BLV transmission through the movement of live cattle.