Dash A P, Hazra R K, Mahapatra N, Tripathy H K
Regional Medical Research Centre, Bhubaneswar, India.
Med Vet Entomol. 2000 Dec;14(4):445-9. doi: 10.1046/j.1365-2915.2000.00265.x.
Malaria has declined around Chilika Lake (85 degrees 20'E, 19 degrees 40'N) in Orissa State, India, from hyperendemicity in the 1930s to hypoendemicity during recent decades. Six decades ago, 21 spp. of Anopheles mosquitoes (Diptera: Culicidae) were recorded from this area, including the well known Indian malaria vectors An. culicifacies Giles, An. fluviatilis James, An. maculatus Theobald, An. stephensi Liston and An. sundaicus (Rodenwaldt), the last formerly regarded as the main vector locally. Surveys of Chilika area during 1995-96 found 8 spp. of culicine plus 14 spp. of anopheline mosquitoes, the latter comprising An. subpictus Grassi sensu lato, An. hyrcanus (Pallas) s.l., An. vagus Dönitz, An. annularis van der Wulp s.l., An. culicifacies Giles s.l., An. aconitus Dönitz, An. varuna Iyengar, An. barbirostris van der Wulp s.l., An. philippinensis Ludlow, An. ramsayi Covell, An. jeyporiensis James, An. pallidus Theobald, An. tessellatus Theobald and An. karwari James in decreasing order of abundance. Among indoor-resting female mosquitoes, the anthropophilic index was 4-7% and some species (An. culicifacies, An. subpictus, An. vagus) tended to enter houses for resting after blood-feeding outside. Females of potentially infective age (three-parous) were obtained for An. culicifacies (11%) and An. annularis (<2%), the more abundant established vector in this coastal area, but not for small samples of An. subpictus and An. vagus. Anophelines reported previously but not found in our survey were An. fluviatilis, An. jamesii Theobald, A. maculatus, An. splendidus Koidzumi, An. stephensi, An. theobaldi Giles and the former main vector An. sundaicus.
印度奥里萨邦奇利卡湖(东经85度20分,北纬19度40分)周边地区的疟疾发病率已从20世纪30年代的高度流行降至近几十年来的低度流行。60年前,该地区记录到21种按蚊(双翅目:蚊科),包括印度著名的疟疾传播媒介嗜人按蚊、溪流按蚊、多斑按蚊、斯氏按蚊和苏门答腊按蚊(罗登瓦尔特),后者曾被视为当地主要传播媒介。1995 - 1996年对奇利卡地区的调查发现了8种库蚊和14种按蚊,按蚊按数量递减顺序包括宽斑按蚊复合组、骚扰按蚊复合组、迷走按蚊、环纹按蚊复合组、嗜人按蚊复合组、乌头按蚊、瓦氏按蚊、须喙按蚊复合组、菲律宾按蚊、雷氏按蚊、杰氏按蚊、苍白按蚊、鳞斑按蚊和卡瓦里按蚊。在室内栖息的雌蚊中,嗜人指数为4 - 7%,一些种类(嗜人按蚊、宽斑按蚊、迷走按蚊)在室外吸血后倾向于进入房屋栖息。在该沿海地区数量较多的传播媒介嗜人按蚊(11%)和环纹按蚊(<2%)中获得了具有潜在感染性年龄(经产三次)的雌蚊,但在宽斑按蚊和迷走按蚊的小样本中未获得。先前报道但在我们的调查中未发现的按蚊有溪流按蚊、杰氏按蚊、多斑按蚊、华丽按蚊、斯氏按蚊、蒂氏按蚊和先前的主要传播媒介苏门答腊按蚊。