Dengue vectors prevalence and the related risk factors involved in the transmission of dengue in Thiruvananthapuram district, Kerala, south India

作者：Samuel P Philip; Thenmozhi V; Nagaraj J; Kumar T Dilip; Tyagi B K^*

来源：Journal of Vector Borne Diseases, 2014, 51(4): 313-319.

• Aedes aegypti
• Ae. albopictus
• dengue
• India
• Kerala

Background & objectives: A longitudinal, entomological and virological study was conducted from 2007 to 2010 in four dengue fever affected areas of Thiruvananthapuram district, Kerala to understand the risk factors involved in the dengue transmission.
Methods: Aedes surveys were carried out seasonally in the selected localities both indoors and peridomestic sites. Water holding containers were sampled for the presence of immature. Outdoor and indoor resting/landing mosquitoes were collected. Blood meal identification was performed by gel diffusion test and viral assay using the ELISA test.
Results: The species found were Aedes (Stegomyia) aegypti (Linn.), Ae. (Stegomyia) albopictus (Skuse) and Ac. (Stegomyia)vittanis (Bigot). Aedes aegypti and Ac. albopictus immature stages were also found during the study period. Aedes aegypti was the only prevalent species in the water-starved Vizhinjam, a rural coastal area with breteau index (BI) ranging from 40 to 271. Aedes albopictus was recorded in rest of the three surveyed localitiestwo urban and one rural ghat areas of Thiruvananthapuram district.
Interpretation & conclusion: The vector control measures should be focused mainly on source reduction of water storage containers present in both outdoor (Ac. albopictus and Ac. vittatus) and indoor (Ac. aegypti). To achieve effective vector management, a public health response beyond routine larviciding or focal spraying is essential throughout the year.

• 出版日期2014-12