Charoenchai A, Tesana S, Pholpark M
Department of Livestock Development, Ministry of Agriculture and Cooperative, Faculty of Medicine, Khon Kaen University, Thailand.
Southeast Asian J Trop Med Public Health. 1997;28 Suppl 1:209-12.
Lymnaea (Radix) auricularia rubiginosa (Michelin, 1831) was surveyed in 54 reservoirs of 18 districts in Amphoe Muang, Khon Kaen Province during February to May 1994. Lymnaeid snails were found in the water of 20 reservoirs, of which 16 reservoirs contained clear water and 4 turbid water. Two of the four turbid water reservoirs received drainage water from Khon Kaen Town. Two thousand four hundred and eight L. auricularia rubiginosa were collected and examined by shedding and crushing. Trematode infection occurred in 163 (6.77%) of 2,408 L. auricularia rubiginosa and some snails were infected with more than one cercarial species. Ninety-nine snails (4.11%) were infected with echinostomes, while mixed infection of echinostomes with Fasciola gigantica and with schistosomes was found in 5 snails (0.21%) and 2 snails (0.08%), respectively. Only 1 snail (0.04%), 19 snails (0.79%) and 37 snails (1.54%) were infected with F. gigantica, schistosomes and unidentified species, respectively. The mean size of infected snails was 6.89 +/- 2.02 mm (6.20-22.36) while the mean of sampled snails was 13.46 +/- 3.64 mm (4.00-26.55). The water plants which were found in reservoirs and presented with snails, were creeping water primose (Jusstaea repens), water lily (Nymphaea sp), water hyacinths (Eichornia crassipes) and grass.
1994年2月至5月期间，对孔敬府直辖县18个区的54座水库中的耳萝卜螺（Lymnaea (Radix) auricularia rubiginosa (Michelin, 1831)）进行了调查。在20座水库的水体中发现了椎实螺，其中16座水库的水清澈，4座水库的水浑浊。4座浑浊水库中有两座接收孔敬镇的排水。共采集了2408只耳萝卜螺，通过逸出法和压碎法进行检查。2408只耳萝卜螺中有163只（6.77%）感染了吸虫，有些螺感染了不止一种尾蚴。99只螺（4.11%）感染了棘口吸虫，5只螺（0.21%）和2只螺（0.08%）分别发现棘口吸虫与巨片形吸虫和血吸虫的混合感染。仅1只螺（0.04%）、19只螺（0.79%）和37只螺（1.54%）分别感染了巨片形吸虫、血吸虫和未鉴定的种类。感染螺的平均大小为6.89±2.02毫米（6.20 - 22.36），而采样螺的平均大小为13.46±3.64毫米（4.00 - 26.55）。在水库中发现有螺附着的水生植物有匍匐水丁香（Jusstaea repens）、睡莲（Nymphaea sp）、凤眼莲（Eichornia crassipes）和草。
