一、对象与方法对烟台市1998年参加抗洪的退伍官兵逐一做流行病学调查和皮内试验。对于皮内试验阳性或皮内试验阴性,但有疫水接触史并出现过相关临床症状、体征者,全部做间接血凝试验(ＩＨＡ)。血吸虫抗原、冻干血吸虫病诊断血球、血球稀释液、阴阳性对照均由山东省寄生虫... I. Objects and Methods To carry out epidemiological investigation and intradermal test one by one for the retired officers and soldiers participating in flood fighting in Yantai in 1998. For intradermal test or intradermal test negative, but there is a history of exposure to water and the emergence of relevant clinical symptoms, signs, all done indirect hemagglutination test (IHA). Schistosoma antigen, lyophilized schistosomiasis diagnosis of blood cells, blood dilution, negative control by Shandong Province parasite ...