scholarly journals Pathogenicity and Genetic Characterization of Vietnamese Classical Swine Fever Virus: 2014–2018

Pathogens ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 169 ◽  
Author(s):  
SeEun Choe ◽  
Van Phan Le ◽  
Jihye Shin ◽  
Jae-Hoon Kim ◽  
Ki-Sun Kim ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Genetic Characterization ◽  
Southern China ◽  
Classical Swine Fever ◽  
Geographical Proximity ◽  
Genotype 2 ◽  
Pig Farms ◽  
North Vietnam ◽  
Vietnamese Strain

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).

Genetic characterization of bovine ephemeral fever virus in southern China, 2013–2017

Virus Genes ◽  
2020 ◽  
Vol 56 (3) ◽  
pp. 390-395 ◽  
Author(s):  
Jia Kun ◽  
Jia Rongrong ◽  
Wang Xiangbin ◽  
Zhao Yan ◽  
Dou Yiping ◽  
...  
Keyword(s):  
Genetic Characterization ◽  
Southern China ◽  
Fever Virus ◽  
Bovine Ephemeral Fever Virus ◽  
Bovine Ephemeral Fever

Identification and genetic characterization of classical swine fever virus isolates in Brazil: a new subgenotype

2016 ◽  
Vol 162 (3) ◽  
pp. 817-822 ◽  
Author(s):  
Marta N. F. Silva ◽  
Diogo M. F. Silva ◽  
Adriana S. Leite ◽  
Ana L. V. Gomes ◽  
Antonio C. Freitas ◽  
...  
Keyword(s):  
Classical Swine Fever Virus ◽  
Genetic Characterization ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
Virus Isolates

scholarly journals Distribution and genetic diversity of Enterovirus G (EV-G) on pig farms in Thailand

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Taveesak Janetanakit ◽  
Supassama Chaiyawong ◽  
Kamonpan Charoenkul ◽  
Ratanaporn Tangwangvivat ◽  
Ekkapat Chamsai ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Characterization ◽  
Rt Pcr ◽  
Cross Sectional Survey ◽  
High Genetic Diversity ◽  
Cross Sectional ◽  
Predominant Genotype ◽  
Diarrhea Virus ◽  
Pig Farms

Abstract Background Enterovirus G (EV-G) causes subclinical infections and is occasionally associated with diarrhea in pigs. In this study, we conducted a cross-sectional survey of EV-G in pigs from 73 pig farms in 20 provinces of Thailand from December 2014 to January 2018. Results Our results showed a high occurrence of EV-Gs which 71.6 % of fecal and intestinal samples (556/777) and 71.2 % of pig farms (52/73) were positive for EV-G by RT-PCR specific to the 5’UTR. EV-Gs could be detected in all age pig groups, and the percentage positivity was highest in the fattening group (89.7 %), followed by the nursery group (89.4 %). To characterize the viruses, 34 EV-G representatives were characterized by VP1 gene sequencing. Pairwise sequence comparison and phylogenetic analysis showed that Thai-EV-Gs belonged to the EV-G1, EV-G3, EV-G4, EV-G8, EV-G9 and EV-G10 genotypes, among which the EV-G3 was the predominant genotype in Thailand. Co-infection with different EV-G genotypes or with EV-Gs and porcine epidemic diarrhea virus (PEDV) or porcine deltacoronavirus (PDCoV) on the same pig farms was observed. Conclusions Our results confirmed that EV-G infection is endemic in Thailand, with a high genetic diversity of different genotypes. This study constitutes the first report of the genetic characterization of EV-GS in pigs in Thailand.

scholarly journals Genetic characterization of pea (Pisum sativum L.) mutants P59 and P60, defective in nitrogen fixation

2020 ◽  
Author(s):  
O. P. Klimenko ◽  
O. A. Kulaeva ◽  
O. Y. Shtark ◽  
A. I. Zhernakov ◽  
I. A. Tikhonovich ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Pisum Sativum ◽  
Genetic Analysis ◽  
Genetic Characterization ◽  
Symbiotic Genes ◽  
Pisum Sativum L ◽  
Pea Mutants ◽  
First Results

Several genes involved in development of symbiosis between pea and rhizobia haven’t yet been characterized in detail. Here, the first results of genetic analysis of pea mutants in the symbiotic genes Sym23 and Sym24 are presented.

scholarly journals Detection and Genetic Characterization of Atypical Porcine Pestivirus in Piglets With Congenital Tremors in Southern China

2019 ◽  
Vol 10 ◽  
Author(s):  
Yongsheng Xie ◽  
Xiaoru Wang ◽  
Danping Su ◽  
Junsen Feng ◽  
Liuming Wei ◽  
...  
Keyword(s):  
Genetic Characterization ◽  
Southern China
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