Publication: Prospective field study of transovarial dengue-virus transmission by two different forms of Aedes aegypti in an urban area of Bangkok, Thailand
1
Issued Date
2011-06-01
Resource Type
ISSN
19487134
10811710
10811710
Other identifier(s)
2-s2.0-79958002771
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Vector Ecology. Vol.36, No.1 (2011), 147-152
Suggested Citation
Supatra Thongrungkiat, Pannamas Maneekan, Ladawan Wasinpiyamongkol, Samrerng Prummongkol Prospective field study of transovarial dengue-virus transmission by two different forms of Aedes aegypti in an urban area of Bangkok, Thailand. Journal of Vector Ecology. Vol.36, No.1 (2011), 147-152. doi:10.1111/j.1948-7134.2011.00151.x Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/11309
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Prospective field study of transovarial dengue-virus transmission by two different forms of Aedes aegypti in an urban area of Bangkok, Thailand
Other Contributor(s)
Abstract
A prospective field study was conducted to determine transovarial dengue-virus transmission in two forms of Aedes aegypti mosquitoes in an urban district of Bangkok, Thailand. Immature Aedes mosquitoes were collected monthly for one year and reared continuously until adulthood in the laboratory. Mosquitoes assayed for dengue virus were processed in pools and their dengue virus infection status was determined by one-step RT-PCR and nested-PCR methods. Of a total 15,457 newly emerged adult Ae. aegypti, 98.2% were dark and 1.8% of the pale form. The results showed that the minimum infection rate (MIR) by transovarial transmission (TOT) of dengue virus during the one-year study ranged between 0 to 24.4/1,000 mosquitoes. Dengue virus TOT increased gradually during the hot summer months, reaching a peak in April-June, while dengue cases peaked in September, a rainy month near the end of the rainy season. Therefore, mosquito infections due to TOT were prevalent four months before a high incidence of human infections. TOT dengue virus infections occurred in both forms of Ae. aegypti. All four dengue serotypes were detected, with DEN-4 predominant, followed by DEN-3, DEN-1, and DEN-2, respectively. © 2011 The Society for Vector Ecology.