Identification and molecular characterization of Culex flavivirus in Culex quinquefasciatus (Diptera: Culicidae): first report from India.

Autor:	Anakha A; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India., Shah HK; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India., Fathima PA; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India., Aiswarya RS; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India., Ajithlal PM; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India., Kumar NP; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India., Kumar A; ICMR- Vector Control Research Centre, Puducherry, 605 006, India., Saini P; ICMR-Vector Control Research Centre (Field Station), Kottayam, Kerala, 686 003, India.
Jazyk:	angličtina
Zdroj:	Transactions of the Royal Society of Tropical Medicine and Hygiene [Trans R Soc Trop Med Hyg] 2023 Dec 04; Vol. 117 (12), pp. 839-843.
DOI:	10.1093/trstmh/trad048
Abstrakt:	Background: Culex quinquefasciatus is a notorious vector known to transmit pathogens such as Wuchereria bancrofti (causing Lymphatic filariasis) and flaviviruses such as West Nile virus in India and St. Louis Encephalitis virus in the USA. It is the vector of the Rift Valley Fever virus, also on the African continent. Mosquitoes also harbor other non-pathogenic insect-specific flaviviruses (ISFs), such as Culex flavivirus (CxFV) and Aedes flavivirus. Recent studies have implicated ISFs interfering with the vectorial efficiency of the pathogenic arbo-viruses. Methods: One hundred specimens of the Cx. quinquefasciatus population in two urban areas in Kerala State, India, were screened to have an understanding of the prevalence of these flaviviruses in this vector species. Viral RNA was extracted from individual specimens and was subjected to RT-PCR towards amplification of the CxFV non-structural protein 5 (NS5) gene. Results: Among the 100 specimens, 7.0% were found to be harboring CxFV infection. The phylogenetic analysis of the gene sequences showed that the virus isolates were genetically related to Kenya, with 98-99% sequence similarities. Conclusion: This is the first report on the occurrence of CxFV from Cx. quinquefasciatus from India. The occurrence of these viruses in mosquitoes could play a critical role in disease vector management. (© The Author(s) 2023. Published by Oxford University Press on behalf of Royal Society of Tropical Medicine and Hygiene.)
Databáze:	MEDLINE
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