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Breeding of Anopheles culicifacies in different waterbodies in the district of Trincomalee

Show simple item record Gunathilaka, P.A.D.H.N. en_US Fernando, M.A.S.T. en_US Hapugoda, M.D. en_US Wijeyerathne, P. en_US Wickremasinghe, A.R. en_US Abeyewickreme, W. en_US 2015-06-18T04:02:51Z en_US 2015-06-18T04:02:51Z en_US 2012 en_US
dc.identifier.citation Proceedings of the Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya. 2012; 13: 63-64. en_US
dc.identifier.uri en_US
dc.identifier.uri en_US
dc.description Annual Research Symposium Abstracts, FGS, University of Kelaniya, November, 2012, Kelaniya en_US
dc.description.abstract Introduction: Anopheles culicifacies (Diptera: Culicidae), the major vector of malaria in Sri Lanka is known to breed in clean and clear water. This study was focused to understand the larval habitats of the major malaria vector with the eco system changes in the Trincomalee district of the Eastern Province. Method: Potential larval habitats for Anopheles mosquitoes were surveyed on a monthly basis for 17 months (January 2011 –June 2012) in 4 different selected sampling sites (Murthankulam, Kommnaimottai, Paranamadawachchiya and Kokmotawewa). Collected larvae were identified using standard taxonomic keys. The species Distribution (C) and Density (D) were calculated. Results: A total of 2996 larval specimens representing 13 Anopheles species were reported from 16 different breeding habitats namely, waste water (n= 635), built well (n= 1229), earth well (n=149), agricultural well (n=9), rain water collection (n=89), animal hoof print (n=17), burrow pit (n=256), rock pool (n=10), canal (n=15), irrigation canal (n=27), lake margin (n=27), tank margin (n=448), pond margin (n=15), marshy land (n=13), paddy field (n=15) and slow moving water (n=42). An. culicifacies was observed as the most predominant species throughout the survey. According to Density criterion, An. culicifacies (44.0%), An. subpictus (19.2%), An. barbirostris (13.2%), An. peditaeniatus (10.28%) and An. nigerrimus (8.7%) were within the dominant class; (D > 5%). Two species (An. vagus, An. pallidus) were in the subdominant class (1< D <5%). Only An. annularis, An. varuna, An. barbumbrosus, An. pseudojamesi, An. jamesii and An. tessellatus were the satellite species (D < 1%). An. nigerrimus, An. subpictus and An. peditaeniatus can be regarded as constant according to distribution (C= 80.1-100%). Only An. vagus was the most frequently reported (C= 60.1 – 80%) species. All other Anopheles including An. culicifacies were observed as infrequent species (C= 20.1 – 40%) and no species was identified as sporadic appearance (C= 0 – 20%). Most productive breeding site for An. culicifacies were drains covered with waste water (Density= 81.57%) in remote areas. Interpretation & conclusion: These results indicate that An. culicifacies has adapted to breed in a wide range of water bodies including waste water collections although they are considered to breed in clean and clear water. The survival of the major vector mosquito in widespread water bodies could be responsible for the increase in the incidence of malaria in the future. en_US
dc.language.iso en en_US
dc.publisher University of Kelaniya en_US
dc.subject.mesh Malaria en_US
dc.subject.mesh Anopheles en_US
dc.subject.mesh Insect Vectors en_US
dc.title Breeding of Anopheles culicifacies in different waterbodies in the district of Trincomalee en_US
dc.type Conference Abstract en_US
dc.identifier.department Molecular Medicine en_US
dc.identifier.department Public Health en_US
dc.identifier.department Parasitology en_US

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