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目的了解不同流行程度疫区IHA和Kato-Katz法血吸虫感染检出率之间在的相关性。方法随机选择湖沼型的高度流行村(感染率>10%)、中度流行村(感染率5%～10%之间)、低度流行村(感染率1～5%之间)各2个自然村,每村整群抽样300～500人,在感染季节后,对每人同时采用Kato-Katz法和IHA法检测。结果在受检的1831人中Kato阳性率16.66%、IHA阳性率28.18%、双阳性率6.28%。结论IHA的阳性率与血吸虫卵粪便检出率不相关,而IHA的阳性预测值与其成正相关关系,即随着地区疫情程度的加重,IHA法的筛查阳性率也随之升高。
Objective To understand the correlation between the detection rates of schistosomiasis infection by IHA and Kato-Katz in different epidemic areas. Methods A total of 2 epidemic villages (infection rate> 10%), moderate endemic villages (infection rate 5% ~ 10%) and low endemic villages (infection rates 1 ~ 5% In the natural village, a cluster sampling of 300 to 500 people per village was carried out. Kato-Katz method and IHA method were applied to each person simultaneously after the infection season. Results Among the 1831 subjects tested, Kato positive rate was 16.66%, IHA positive rate was 28.18%, and double positive rate was 6.28%. Conclusion The positive rate of IHA is not related to the detection rate of schistosomiasis eggs, while the positive predictive value of IHA is positively correlated with it. That is, the positive rate of IHA screening increases with the severity of the epidemic.