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Volume 9, Issue 10

Whole-genome sequencing and phylogenetic analysis of coxsackievirus-A16 strains causing hand, foot and mouth disease (HFMD) in India Open Access

Abstract

Hand, foot and mouth disease (HFMD) is a common childhood infectious disease, caused by enteroviruses (EVs), which can present with typical or atypical lesions. The illness is self-limiting, but it can also have serious complications. Since 1997, HFMD infections have become endemic and have increased to epidemic proportions across the Asia Pacific region, including India. Coxsackievirus-A16 (CV-A16) outbreaks occurred in India from 2005 onwards, although the clinical symptoms were noticeably different during this period. Understanding the population dynamics of enteroviruses that cause HFMD is crucial in the post-polio era because one of the circulating strain may replace another as the dominant strain. The aim of this study is to describe the genetic features of the CV-A16 strains isolated from hand, foot and mouth disease (HFMD) patients in India. Reverse transcription PCR (RT-PCR) and cell-culture-based isolation of CV-A16 was done from the 55 clinical samples. The entire genome of the CV-A16 isolate was performed from the seven isolates. After the sequences were analysed, a phylogenetic tree was created using bioinformatics tools. The total genomic length obtained was 7411 base pairs (bp). Nucleotide similarity across various regions, including 5′UTR, P1, P2 and 3′UTR, ranged from 87.0–97.9 %, 77.0–95.4 %, 80.3–96.9 %, and 77.9–96.2 %, respectively. Correspondingly, similarities in the VP1 region’s nucleotide and amino acid sequences were 91.4–96.4 % and 99.3–99.7 %, respectively. Phylogenetic analysis highlighted that CV-A16 strains identified in Pune, Maharashtra, were grouped within the same cluster. The analysed CV-A16 isolates in this study aligned with subgenotype B1c. These findings have far-reaching implications for the surveillance, prevention and management of HFMD and CV-A16. Monitoring the dynamics of CV-A16 strains, informed by the genetic characteristics identified here, will significantly impact strategies aimed at tackling HFMD and its associated public health challenges.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Coxsackievirus A16 , Functional genomics , HFMD , Myocarditis and Phylogenetic analysis
Funding
This study was supported by the:
  • ICMR-National Institute of Virology, Pune (Award EVI2103)
    • Principle Award Recipient: SanjaykumarTikute
© 2023 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2023-10-31
2024-12-05
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Whole-genome sequencing and phylogenetic analysis of coxsackievirus-A16 strains causing hand, foot and mouth disease (HFMD) in India
M Gen 9, 001130 (2023); https://doi.org/10.1099/mgen.0.001130
/content/journal/mgen/10.1099/mgen.0.001130
/content/journal/mgen/10.1099/mgen.0.001130
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