Detection and Molecular Characterization of Two Canine Circovirus Genotypes Co-circulating in Vietnam

Overview

Journal Vet Q

Specialty Veterinary Medicine

Date 2021 Aug 11

PMID 34380001

Citations 11

Authors

Nguyen Manh Tuong

Chutchai Piewbang

Anudep Rungsipipat

Somporn Techangamsuwan

Affiliations

Soon will be listed here.

Abstract

Background: Canine circovirus is reported in dogs in many countries, including the USA, China and Thailand. It has been detected in healthy dogs and dogs with diarrhea, hemorrhagic gastroenteritis, and vasculitis. It comprises five genotypes and is frequently found as a coinfection with canine parvovirus-2 (CPV-2).

Aim: To characterize canine circovirus genotypes co-circulating with CPV-2 in Vietnam.

Method: PCR assessment of 81 CPV-2-positive fecal samples from Vietnamese diarrheic dogs up to seven months of age for other viral enteric pathogens, including canine bocavirus, canine adenovirus, paramyxovirus, canine coronavirus, porcine circovirus-3 and canine circovirus. In addition, eight selected full genome sequences of Vietnamese canine circovirus were analyzed and used for phylogeny.

Results: In total 19.8% of samples were found to be positive for canine circovirus. Phylogeny revealed that the Vietnamese canine circovirus strains were clustered in two different genotypes (genotype-1 and -3). The genetic diversity among Vietnamese canine circovirus was 86.0-87.2%. The nucleotide discrepancy among both genotypes altered the deduced amino acid sequence in 14 and ten residues of the replicase and capsid proteins, respectively. Genetic recombination analysis revealed that the Vietnamese canine circovirus-6 strain has the American and Chinese canine circovirus as its major and minor parents, respectively. Only a single dog revealed triple detections of CPV-2c, Canine circovirus and canine adenovirus (1.2%).

Conclusion: The co-circulation of two different genotypes of canine circovirus and CPV-2c in dogs in Vietnam has been illustrated.

Clinical Relevance: The mortality rate with CPV-2 only (22%) doubled in dogs with canine circovirus and CPV-2 co-infection.

Citing Articles

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PMID: 37859867 PMC: 10583600. DOI: 10.29374/2527-2179.bjvm000723.

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