J Vet Sci.  2021 Jul;22(4):e50. 10.4142/jvs.2021.22.e50.

Molecular detection and genetic diversity of bovine papillomavirus in dairy cows in Xinjiang, China

• Meng Q
• Ning C
• Wang L
• Ren Y
• Li J
• Xiao C
• Li Y
• Li Z
• He Z
• Cai X
• Qiao J

• KMID: 2518804
• DOI: http://doi.org/10.4142/jvs.2021.22.e50

Abstract

Background
Bovine papillomatosis is a type of proliferative tumor disease of skin and mucosae caused by bovine papillomavirus (BPV). As a transboundary and emerging disease in cattle, it poses a potential threat to the dairy industry.
Objectives
The aim of this study is to detect and clarify the genetic diversity of BPV circulating in dairy cows in Xinjiang, China.
Methods
122 papilloma skin lesions from 8 intensive dairy farms located in different regions of Xinjiang, China were detected by polymerase chain reaction. The genetic evolution relationships of various types of BPVs were analyzed by examining this phylogenetic tree.
Results
Ten genotypes of BPV (BPV1, BPV2, BPV3, BPV6, BPV7, BPV8, BPV10, BPV11, BPV13, and BPV14) were detected and identified in dairy cows. These were the first reported detections of BPV13 and BPV14 in Xinjiang, Mixed infections were detected, and there were geographical differences in the distribution of the BPV genotypes. Notably, the BPV infection rate among young cattle (< 1-year-old) developed from the same supply of frozen sperm was higher than that of the other young cows naturally raised under the same environmental conditions.
Conclusions
Genotyping based on the L1 gene of BPV showed that BPVs circulating in Xinjiang China displayed substantial genetic diversity. This study provided valuable data at the molecular epidemiology level, which is conducive to developing deep insights into the genetic diversity and pathogenic characteristics of BPVs in dairy cows.

Keyword

bovine papillomavirus; molecular detection; genetic diversity; Xinjiang; China