1. The pathogenic potential of Blastocystis hominis is still controversial because many epidemiologic and experimental animal studies gave quite different conclusions. 人芽囊原虫是否具有致病性一直颇有争议，因为很多流行病学研究和实验动物研究得出了矛盾的结论。
2. Basis epidemiologic data were collected in the same time. 同时收集相关的流行病学基础资料。
3. There is clinical and epidemiologic evidence to support this notion. 有相关的临床和流行病学的证据可以支持这一观点。
4. Epidemiologic aspects, service elements and evaluative procedures are highlighted. 重点强调流行病学，服务因素和评估程序。
5. 180 million for epidemiologic, regulatory, institutional and operational activities. 8亿美元用于流行病学研究、监管、机构和业务活动。
