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云南澜沧江边媳姑坝,1956年证实为恙虫病自然疫源地。1979年4月到1980年5月,笔者在该地进行了有关调查研究。共获恙螨幼虫6790只,计16个种类,地里纤恙螨为优势种。恙螨幼虫在鼠体出现的时间和数量,是随温湿度和雨量的不同而有所差别;地里纤恙螨等季节分布十分明显;同时显示出恙螨幼虫一定的嗜温性及嗜冷性的差别。恙螨幼虫的寄主有7种小型哺乳动物,平均染带率为42.31%,总指数为20.09;主要寄主为斯氏家鼠及黄胸鼠。从鼠体及地里纤恙螨分离到恙虫病立克次体13株,说明该地仍然且牢固地存在恙虫病自然疫源地。
Yunnan Lancang River daughter-in-law, confirmed in 1956 as a natural foci of tsutsugamushi disease. April 1979 to May 1980, the author conducted a survey in the area. A total of 6790 pieces of chigger larvae were collected, accounting for 16 species. The dominant species was chigger mites. Chigger mite larvae appeared in the time and the number of mice, with the temperature and humidity and rainfall vary; the chili mites and other seasonal distribution is obvious; also showed chigger larvae certain mesophilic and psychrophilic Sexual differences. Chigger mite larvae host seven kinds of small mammals, the average rate of 42.31% with a total, the total index of 20.09; the main host for the House mouse and Rattus flavipectus. 13 strains of Rickettsia tsutsugamushi were isolated from chigger mites in mice and in the ground, indicating that there is still a natural foci of scrub typhus in this area.