Pathogenicity and Genetic Characterization of Vietnamese Classical Swine Fever Virus: 2014-2018

Overview

Journal Pathogens

Date 2020 Mar 4

PMID 32121079

Citations 13

Authors

SeEun Choe

Van Phan Le

Jihye Shin

Jae-Hoon Kim

Ki-Sun Kim

Sok Song

Ra Mi Cha

Gyu-Nam Park

Thi Lan Nguyen

Bang-Hun Hyun

Bong-Kyun Park

Dong-Jun An

Affiliations

Soon will be listed here.

Abstract

Here, we examined the pathogenicity and genetic differences between classical swine fever viruses (CSFV) isolated on pig farms in North Vietnam from 2014-2018. Twenty CSFV strains from 16 pig farms were classified as genotype 2 (sub-genotypes 2.1b, 2.1c, and 2.2). The main sub-genotype, 2.1c, was classified phylogenetically as belonging to the same cluster as viruses isolated from the Guangdong region in South China. Strain HY58 (sub-genotype 2.1c), isolated from pigs in Vietnam, caused higher mortality (60%) than the Vietnamese ND20 strain (sub-genotype 2.2). The Vietnamese strain of sub-genotype 2.1b was estimated to have moderate virulence; indeed, genetic analysis revealed that it belongs to the same cluster as Korean CSFV sub-genotype 2.1b. Most CSFVs circulating in North Vietnam belong to sub-genotype 2.1c. Geographical proximity means that this genotype might continue to circulate in both North Vietnam and Southern China (Guangdong, Guangxi, and Hunan).

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