title: Molecular epidemiology of Crimean-Congo haemorrhagic fever virus in India.
abstract: Crimean-Congo haemorrhagic fever (CCHF) is an emerging zoonotic disease in India which is prevalent in neighbouring countries. CCHF virus (CCHFV) is a widespread tick-borne virus which is endemic in Africa, Asia, Eastern Europe and the Middle East. In the present study, samples of clinically suspected human cases from different areas of northern-western India were tested for the presence of CCHFV by RT-PCR through amplification of nucleocapsid (N) gene of CCHFV. Positive samples were sequenced to reveal the prevailing CCHFV genotype(s) and phylogenetic relatedness. A phylogenetic tree revealed the emergence of diverse strains in the study region showing maximum identity with the Pakistan, Afghanistan and Iran strains, which was different from earlier reported Indian strains. Our findings reveal for the first time the emergence of the Asia 1 group in India; while earlier reported CCHFV strains belong to the Asia 2 group.
authors: National Centre for Disease Control,Delhi,India.
authors: P
authors: P
authors: Singh
authors: National Centre for Disease Control,Delhi,India.
authors: M
authors: M
authors: Chhabra
authors: National Centre for Disease Control,Delhi,India.
authors: P
authors: P
authors: Sharma
authors: National Centre for Disease Control,Delhi,India.
authors: R
authors: R
authors: Jaiswal
authors: National Centre for Disease Control,Delhi,India.
authors: G
authors: G
authors: Singh
authors: National Centre for Disease Control,Delhi,India.
authors: V
authors: V
authors: Mittal
authors: National Centre for Disease Control,Delhi,India.
authors: A
authors: A
authors: Rai
authors: National Centre for Disease Control,Delhi,India.
authors: S
authors: S
authors: Venkatesh
keywords: Crimean-Congo haemorrhagic fever; N gene; molecular epidemiology; phylogenetic analysis