霍乱传染源的微生态学研究

Microecological Study on Reservoir of Vibrio Cholerae

霍乱弧菌表面具有粘附性,并能降解甲壳质,在河口水中能牢固地粘附于浮游动物桡足类墨氏胸刺水蚤表面上分解甲壳质而延长生命活动,借此在河口底层越冬,由此提示墨氏胸刺水蚤可能成为人以外的传染源。该宿主与霍乱孤菌的微生态系,尚需进一步研究。

Whether Vibrio cholerae has any animal hosts other than human being is an unsolved mieroecological problem. In order to solve the problem in our experiment, we chose Centropages mcmurrichi as the host and estuarine water as the habitat, arid the following tests were performed: 1) adherent assay, 2) assay of decomposing chitin, 3) the imitation assay of V.eholerae passing the winter in estuarine water, and 4) obseravation of V. cholerae being contained in a bag of semipermeable membrane to pass the winter in testing scene of a river estuary. It appeared that V. cholerae was able to adhere to and decompose chitin on its surface. In river water at the estuary, V. cholerae was found to adhere steadily to the surface of Centropages mcmurrichi and decompose its chitin. This tends to lengthen the period of life at the bottom of estuarine water in passing over winter by saprophytic means. It suggests that Centrapages mcmurrichi might serve as the reservior of cholera beside human body. Study should be performed further on the microecological system between V. cholerae and its hosts.