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四、恙螨的季节消长与发病时间的调查: 为了探讨恙螨幼虫期的季节消长与出血热发病时间的关系,在甲县终南公社及乙县某工厂重点发病区1973年6月至1974年4月所取得的周年资料进行分析: 1.恙螨总指数的季节变化: 从两个调查点检出七种恙螨:小盾恙螨半
In order to investigate the relationship between the seasonal fluctuation of chigger mite larvae and the time of onset of haemorrhagic fever, we found that the incidence of chigger mites during the period from June 1973 to 1974 April annual data obtained for analysis: 1. Chigger multivariate seasonal changes in the index: two check points detected from two chigger mite: a small chigger mite half