Distribution of Aedes aegypti and Aedes albopictus in different eco zones of Thiruvananthapuram city with special reference to dengue viremia in humans

  • S. Sunil Kumar
  • D.A. Evans
  • K. Muthulakshmi
  • T. DilipKumar
  • R. Heera Pillai
  • R. Radhakrishnan Nair
  • Francis Sunny

Abstract

Mosquito index study of three ecologically different ecozones of the Thiruvananthapuram district, Kerala showed sharp difference on the proportionate distribution of Aedes aegypti and Aedes albopictus. Human dengue viremia (HDV) was very high in those ecozones where A.aegypti density was high and HDV was low where A.albopictus was high. In a coastal zone of Thiruvananthapuram city, A. aegypti was the most abundant vector and in a hilly, arid suburban zone, A.albopictus was the abundant vector. In the urban zone both species of mosquitoes showed equal distribution. Study on the circulating serotypes in the serum of HDV by Single step single tube Multiplex PCR showed all the four serotypes viz DENV1, DENV2, DENV3 and DENV4 in patients of Thiruvananthapuram city, which indicated the possibility of Dengue Shock Syndrome, unless there is efficient vector management. Among the four dengue serotypes, Type 1 was the most abundant virus. Abundance of microhabitats in Thiruvananthapuram city, which support A. aegypti may be the reason for high prevalence of dengue fever in the urban zone.

Author Biographies

S. Sunil Kumar

Regional Cancer Centre, Thiruvananthapuram 695011, Kerala, India

D.A. Evans

Department of Zoology,

University College, Thiruvananthapuram 695001, Kerala, India

K. Muthulakshmi

Meenakshy Medical College and Research Centre, Kancheepuram, Chennai, India

T. DilipKumar

Regional Office of Health and Family Welfare,

Thiruvananthapuram - 695011, Kerala, India

R. Heera Pillai

Laboratory Medicine and Molecular Diagnostics,

Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram - 695001, Kerala, India

R. Radhakrishnan Nair

Laboratory Medicine and Molecular Diagnostics,

Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram - 695001, Kerala, India

Francis Sunny

Department of Zoology,

University College, Thiruvananthapuram - 695001, Kerala, India

Published
2018-12-31
How to Cite
Sunil Kumar, S., Evans, D., Muthulakshmi, K., DilipKumar, T., Heera Pillai, R., Nair, R. R., & Sunny, F. (2018). Distribution of Aedes aegypti and Aedes albopictus in different eco zones of Thiruvananthapuram city with special reference to dengue viremia in humans. ENTOMON, 43(4), 223-230. https://doi.org/10.33307/entomon.v43i4.402
Section
Articles