Dengue vector prevalence and virus infection in a rural area in south India
| Autor: | A. Munirathinam, C. R. Katholi, S. C. Tewari, A. Gajanana, R. Manavalan, V. Thenmozhi |
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| Rok vydání: | 2004 |
| Předmět: |
Wet season
Veterinary medicine Aedes albopictus Endemic Diseases viruses Population India Aedes aegypti Rural Health Dengue virus medicine.disease_cause Dengue fever law.invention Dengue law Aedes medicine Prevalence Animals Humans Longitudinal Studies education Developing Countries Ecosystem education.field_of_study biology fungi Public Health Environmental and Occupational Health virus diseases Dengue Virus medicine.disease biology.organism_classification Insect Vectors Infectious Diseases Transmission (mechanics) Vector (epidemiology) Parasitology Female Seasons |
| Zdroj: | Tropical medicineinternational health : TMIH. 9(4) |
| ISSN: | 1360-2276 |
| Popis: | We conducted a 2-year (1997-1999) longitudinal, entomological and virological study in three dengue endemic villages in Vellore district, Tamil Nadu, to understand the dynamics of dengue transmission. Aedes aegypti (Linn.), Ae. albopictus (Skuse) and Ae. vittatus (Bigot) were the prevalent vector species. Aedes aegypti was breeding throughout the year with a Breteau index ranging from 9.05 to 45.49. Aedes albopictus and Ae. vittatus were prevalent mainly in the rainy season. Small water holding containers (cemented tanks/cisterns) were the perennial breeding source of Ae. aegypti, and its abundance was significantly higher in semi-urbanized central areas than the peripheral areas of the villages. From 271 pools (4016 specimens) of adult females, eight dengue virus (DENV) isolates were obtained of which seven were from Ae. aegypti and one from Ae. albopictus. This is the first report of DENV isolation from Ae. albopictus in rural India. Infection rates in the two species were comparable. However, due to higher and perennial prevalence, Ae. aegypti is considered as primary vector with Ae. albopictus playing a secondary role. Despite circulation of all four serotypes (DENV 1-4) detected mainly during the transmission season, the high anthropophilic index of the vectors and their abundance, no human dengue case was reported, suggesting silent dengue transmission. |
| Databáze: | OpenAIRE |
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