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Genome Sequences of the Novel Porcine Parvovirus 3, Identified in Guangxi Province, China.

ABSTRACT: Porcine parvovirus 3 is a novel parvovirus that infects pigs. Here, we report two genome sequences of porcine parvovirus 3 strains GX1 and GX2, which are highly prevalent in Guangxi province. It will help in understanding the epidemiology and molecular characteristics of the porcine parvovirus 3.

SUBMITTER: Zhong H

PROVIDER: S-EPMC4777746 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature

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Genome Sequences of the Novel Porcine Parvovirus 3, Identified in Guangxi Province, China.

Zhong Hui H Li Xiangmin X Zhao Zekai Z An Chunjing C Wan Peng P Wu Mengge M Chen Huanchun H Qian Ping P

Genome announcements 20160303 2

Porcine parvovirus 3 is a novel parvovirus that infects pigs. Here, we report two genome sequences of porcine parvovirus 3 strains GX1 and GX2, which are highly prevalent in Guangxi province. It will help in understanding the epidemiology and molecular characteristics of the porcine parvovirus 3. ...[more]

PMID: 26941135

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Project description:BackgroundPorcine circovirus type 2 (PCV2), a member of the genus Circovirus and family Circoviridae, is a closed, small, circular, and single-stranded DNA virus, and it is a crucial swine pathogen of porcine circovirus-associated diseases (PCVADs). PCV2 was first detected in PK-15(ATCC-CCL) cells in 1974, which has caused significant economic loss to the swine industry throughout the world. And the first case of PCV2 was reported in China in 2000. At present, PCV2d is the main genotype circulating widely in China.MethodsLymph samples were obtained from piglets with emaciation and respiratory disease in Guangxi province, China. The main pathogens were detected via PCR from lymph samples, and then PCV2-single positive samples were used to inoculate with PK-15 cells. After successive generations, the isolate was subsequently identified by polymerase chain reaction (PCR), immunofluorescence assay (IFA), Western blot (WB), and transmission electron microscopic (TEM). The full-length genome and genetic characterization of isolates were analyzed by Sanger sequencing. The TCID50 of the PCV2-GX-6 was determined by IFA, and the pathogenicity of PCV2 in BALB/c mice was analyzed via the mouse model.ResultsThe isolates were successfully isolated from clinical samples. The complete genome of PCV2-GX-4, PCV2-GX-6, PCV2-GX-7, PCV2-GX-11 and PCV2-GX-16 have been amplified, sequenced, and deposited in GenBank (accession no.: OR133747, OQ803314, OR133748, OR133749, OR133750). Homology and phylogenetic analysis with reference strains showed that the isolates belonged to the PCV2d genotype. The PCV2-GX-6 could be stably passaged more than 30 times in PK-15 cells. PCV2-GX-6 was identified by PCR, IFA, WB and TEM. The results of homology showed that PCV2-GX-6 was closely related to the reference strains PCV2-JS17-8 (GenBank accession no.: MH211363). Pathogenicity studies in mice have shown that PCV2-GX-6 can lead to growth inhibition of mice. Meanwhile PCV2-GX-6 caused the typical lesions of spleen, lung and kidney. The results of qPCR showed that PCV2 can effectively proliferate in the liver, spleen, lung, and kidney.ConclusionPCV2-GX-6 can successfully infect BLAB/c mice, effectively proliferate in major organs, and possessed high pathogenicity. In conclusion, combined with the genotype and pathogenicity of PCV2d currently prevalent, PCV2-GX-6 can be used as a candidate vaccine strain.

Dataset Information

Genome Sequences of the Novel Porcine Parvovirus 3, Identified in Guangxi Province, China.

Publications

Genome Sequences of the Novel Porcine Parvovirus 3, Identified in Guangxi Province, China.

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