Dengue Virus Serotypes Circulating among Aedes Mosquitoes in the Lucknow District of North India: Molecular Identification and Characterization

Abstract

Dengue is one of the most critical diseases, caused by Dengue virus (DENV) serotypes (DENV-1 to DENV-4). Study aims to detect DENV in natural A. aegypti from endemic regions of Uttar Pradesh. From 2010- 2013, mosquitoes collected from Uttar Pradesh tested for Dengue virus serotypes by capsid-premembrane gene-based PCR analyzed for genotypes sequencing of the C-prM junction of DENV genome. A total of 4731, 53.54% (n=2671) A. aegypti and 46 % (n=2060) A. albopictus mosquitoes were collected. Of 226 mosquito pools, 10 pools of A. aegypti and 14 pools of A. albopictus were positive for DENV by PCR. All 24 isolates identified as DENV-I; Genotype (G)-III (n=8), G-V (n=1); DENV-2; G-IV (n=4); DENV-3; G-III (n=11). The overall minimum infection rate was much higher in A. albopictus mosquitoes and presence of MIR in male mosquitoes is an indicating natural vertical transmission and important observation in geographical area indicating natural vertical transmission.

Keywords

• aedes mosquitoes
• entomological surveillance
• dengue virus
• vertical transmission
• polymerase chain reaction