Gunathilaka Nayana, Abeyewickreme Wimaladharma, Hapugoda Menaka, Wickremasinghe Rajitha
Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, P.O. Box 6, Thallagolla Road, Ragama, Sri Lanka ; Tropical & Environmental Diseases & Health Associates, No. 3, Elibank Road, Colombo 5, Sri Lanka.
Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, P.O. Box 6, Thallagolla Road, Ragama, Sri Lanka.
Biomed Res Int. 2015;2015:823810. doi: 10.1155/2015/823810. Epub 2015 Oct 25.
Mosquito larval ecology is important in determining larval densities and species assemblage. This in turn influences malaria transmission in an area. Therefore, understanding larval habitat ecology is important in designing malaria control programs.
Larval surveys were conducted in 20 localities under five sentinel sites (Padavisiripura, Gomarankadawala, Thoppur, Mollipothana, and Ichchallampaththu) in Trincomalee District, Eastern Province of Sri Lanka, between June 2010 and July 2013. The relationship between seven abiotic variables (temperature, pH, conductivity, Total Dissolved Solid (TDS), turbidity, Dissolved Oxygen (DO), and salinity) was measured.
A total of 21,347 anophelines were recorded representing 15 species. Anopheles subpictus 24.72% (5,278/21,347) was the predominant species, followed by 24.67% (5,267/21,347) of An. nigerrimus and 14.56% (3,109/21,347) of An. peditaeniatus. A total of 9,430 breeding habitats under twenty-one categories were identified. An. culcicifacies was noted to be highest from built wells (20.5%) with high salinity (1102.3 ± 81.8 mg/L), followed by waste water collections (20.2%) having low DO levels (2.85 ± 0.03 mg/L) and high TDS (1,654 ± 140 mg/L).
This study opens an avenue to explore new breeding habitats of malaria vectors in the country and reemphasizes the requirement of conducting entomological surveillance to detect potential transmission of malaria in Sri Lanka under the current malaria elimination programme.
蚊虫幼虫生态学对于确定幼虫密度和物种组合很重要。这进而会影响一个地区的疟疾传播。因此，了解幼虫栖息地生态学对于设计疟疾控制项目很重要。
2010年6月至2013年7月期间，在斯里兰卡东部省亭可马里区五个哨点（帕达维西里普拉、戈马兰卡德瓦拉、托普尔、莫利波塔纳和伊查兰帕图）的20个地点进行了幼虫调查。测量了七个非生物变量（温度、pH值、电导率、总溶解固体（TDS）、浊度、溶解氧（DO）和盐度）之间的关系。
共记录到21347只按蚊，分属15个物种。伪威氏按蚊占24.72%（5278/21347），为优势物种，其次是黑色按蚊，占24.67%（5267/21347），多斑按蚊占14.56%（3109/21347）。共识别出21类9430个滋生地。在盐度高（1102.3±81.8毫克/升）的建筑水井中，库氏按蚊数量最多（20.5%），其次是溶解氧水平低（2.85±0.03毫克/升）且总溶解固体高（1654±140毫克/升）的废水收集处（20.2%）。
本研究为探索该国疟疾媒介的新滋生地开辟了一条途径，并再次强调在当前的疟疾消除计划下，需要进行昆虫学监测以检测斯里兰卡疟疾的潜在传播。
