Molecular characterization of bovine foamy virus and its association with          bovine leukemia virus infection in Vietnamese cattle

Dung Thi LE; Son Vu NGUYEN; Mari OKAMOTO; Nanako YAMASHITA-KAWANISHI; Tung Duy DAO; Vuong Nghia BUI; Haruko OGAWA; Kunitoshi IMAI; Takeshi HAGA

doi:10.1292/jvms.21-0190

Virology

Molecular characterization of bovine foamy virus and its association with bovine leukemia virus infection in Vietnamese cattle

Dung Thi LE, Son Vu NGUYEN, Mari OKAMOTO, Nanako YAMASHITA-KAWANISHI, Tung Duy DAO, Vuong Nghia BUI, Haruko OGAWA, Kunitoshi IMAI, Takeshi HAGA

Author information

Dung Thi LE
Division of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
Son Vu NGUYEN
Department of Veterinary Pathology, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam
Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
Mari OKAMOTO
Division of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
Nanako YAMASHITA-KAWANISHI
Division of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
Tung Duy DAO
Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan
National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam
Vuong Nghia BUI
Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan
National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam
Haruko OGAWA
Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan
Kunitoshi IMAI
Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan
Takeshi HAGA
Division of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

Keywords: bovine foamy virus (BFV), bovine leukemia virus (BLV), cattle, Vietnam

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Supplementary material

2021 Volume 83 Issue 8 Pages 1273-1277

DOI https://doi.org/10.1292/jvms.21-0190

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Abstract

The detection of bovine foamy virus (BFV) in Vietnamese cattle was performed using conventional PCR targeting pol and gag genes. Out of 243 tested samples, ten (4.1%) and eight (3.3%) samples were positive for BFV gag and pol DNA, respectively. The prevalence of bovine leukemia virus (BLV) estimated by detection of proviral DNA using nested PCR targeting env gene was 26.7% (65/243). The results of nucleotide sequence alignment and the phylogenetic analysis suggested that Vietnamese BFV strains showed high homology to isolates belonging to either European or non-European clades. There was no significant correlation between BLV and BFV. This study provides information regarding BFV infection and confirms the existence of two BFV clades among Vietnamese cattle for the first time.

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