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近年来，Kato－Katz法作为蠕虫感染的一项定性和定量技术被广泛应用于日本血吸虫病的流行病学调查、实验诊断和疗效考核。但当EPG＜20时，虫卵不易检出，轻感染可能被漏检。故有人认为该法仅适用于较重流行区查病。那么，在重度流行区，该法是否存在漏检情况呢？我们做了有关方
In recent years, the Kato-Katz method as a qualitative and quantitative technique for helminth infection has been widely applied to the epidemiological investigation, laboratory diagnosis and therapeutic evaluation of schistosomiasis japonica. However, when the EPG is less than 20, the eggs are not easily detected, and light infections may be missed. Therefore, some people think that the law is only applicable to the more popular epidemic disease. So, in severe endemic areas, the law whether there is missing the case? We made the parties