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. 2020 Mar 26;2(4):acmi000101.
doi: 10.1099/acmi.0.000101. eCollection 2020.

Incrimination of Aedes aegypti and Aedes albopictus as vectors of dengue virus serotypes 1, 2 and 3 from four states of Northeast India

Sumi Chetry  1 , Saurav Jyoti Patgiri  1 , Dibya Ranjan Bhattacharyya  1 , Prafulla Dutta  1 , N Pradeep Kumar  2
Affiliations

Incrimination of Aedes aegypti and Aedes albopictus as vectors of dengue virus serotypes 1, 2 and 3 from four states of Northeast India

Sumi Chetry et al. Access Microbiol. .

Abstract

Dengue is an important vector borne disease with a great public health concern worldwide. Northeast India has experienced dengue almost every year for a decade. As studies on dengue vectors from this region are limited, we undertook an investigation to detect natural infection of the dengue virus (DENV) in potential dengue vectors of this region. Adult Aedes mosquitoes which were collected were subjected to RT-PCR for detection of infecting dengue serotype. Minimum infection rate was also determined for each positive pool. Out of the total 6229 adult Aedes mosquitoes collected, Aedes aegypti (63.3 %) was abundant in comparison to Aedes albopictus (36.7 %). These specimens (515 mosquito pools) were subjected to RT-PCR for detection of DENV-1, 2, 3 and 4. RT-PCR revealed the existence of DENV in both male as well as female mosquito pools suggesting natural transovarial transmission of DENV in this region. A total of 54 pools tested were positive for DENV-1, 2, 3 serotypes. This study revealed the occurence of DENV in both the potential dengue vectors from this region along with evidence of transovarial transmission which helps in persistence of the virus in nature.

Keywords: Aedes aegypti; Aedes albopictus; Dengue virus; Northeast India; Transovarial transmission.

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Conflict of interest statement

The author declare no competing financial or non-financial interests.

Figures

Fig. 1.
Fig. 1.
Graphical representation of distribution of Ae. aegypti and Ae. albopictus in the four study sites.
Fig. 2.
Fig. 2.
Graphical representation of month-wise Aedes collection.
See this image and copyright information in PMC

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