Lin TL, Lin TH, Chiu SC, Huang YP, Ho CM, Lee CC, Wu HS, Lin JH. Molecular epidemiological analysis of Saffold cardiovirus genotype 3 from upper respiratory infection patients in Taiwan.
J Clin Virol 2015;
70:7-13. [PMID:
26305811 DOI:
10.1016/j.jcv.2015.06.100]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 12/12/2022]
Abstract
BACKGROUND
Saffold cardiovirus (SAFV) belongs to the Cardiovirus genus of Picornaviridae family, and may be a relevant new human pathogen; Thus far, eleven genotypes have been identified. The SAFV type 3 (SAFV-3) is thought to be the major genotype and is detected relatively frequently in children with acute gastroenteritis and respiratory illness. The epidemiology and pathogenicity of SAFV-3 remain unclear.
OBJECTIVES
To investigate the genomic and epidemiologic profiles of SAFV-3 infection in Taiwan.
STUDY DESIGN
Virus was detected in respiratory samples from children suffering for URI. SAFV-3 isolates were detected by isolation on cell culture and IF assay. The molecular typing was performed by RT-PCR and was sequenced to compare with reference strains available in the NCBI GeneBank. Serum samples were collected from 2005 to 2013 in Taiwan for seroprevalence investigation.
RESULTS
A total of 226 specimens collected from children with URIs, 22 (9.73%) were positive for SAFV-3. The majority of SAFV-3 infections were found in children less than 6 years of age (14 of 22, 63.6%). Genetic analysis of VP1 coding region of Taiwanese isolates shown an 83.2-97.7% difference from other available SAFV-3 sequences in NCBI GenBank. Phylogenetic analysis revealed there is three genetic groups of SAFV-3 co-circulated in Taiwan during the study period. In addition, seroprevalence investigation results indicated that SAFV-3 infection occurs early in life and 43.7-77.8% of children aged between 6 months to 9 years old, had neutralizing antibodies against SAFV-3.
CONCLUSION
SAFV-3 may have circulated in Taiwan for some time and it appears to be one of the etiological agents responsible for URIs in children.
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