Natural vertical transmission of dengue viruses by Aedes aegypti in Chennai, Tamil Nadu, India.
作者： Thenmozhi , Ayanar K , Manavalan R , Arunachalam N , Rajendran R
DOI:
关键词: Aedes 、 Aedes aegypti 、 Wild caught 、 Dengue fever 、 Transmission (medicine) 、 Biology 、 Toxorhynchites splendens 、 Veterinary medicine 、 Transovarial transmission 、 Dengue virus
摘要: BACKGROUND & OBJECTIVE Dengue viruses are spread and maintained in an Aedes aegypti-human- Ae. aegypti cycle urban areas of the tropics. also nature by vertical transmission aegypti. A study was undertaken Chennai, a known endemic city south India, to comprehend natural dynamics assess its epidemiological importance. METHODS males collected resting landing collections were tested for dengue virus infection antigen-capture enzyme-linked immunosorbent assay (ELISA) further examined insect bioassay, Toxorhynchites splendens inoculation-indirect immunofluorescence technique (Toxo-IFA) using serotype-specific monoclonal antibodies (Mabs), if found positive ELISA. RESULTS Of 509 pools (n=5408) screened, 15 pools, April, June- July, November-December 2003 March, May 2004, minimum rate (MIR) among adult high June (28.0/ 1000). Three could be serotyped as dengue-2 (2 pools) dengue-3 (1 pool). INTERPRETATION CONCLUSION isolations from wild caught indicate occurrence transovarial transmission. Vertical mainly observed summer months when infections humans low suggesting that adopt novel strategy surviving adverse climatic conditions.
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