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用间接血凝试验（ＩＨＡ），检测了３１８名归国人员和６０名精神病病人血清弓形虫抗体，共发现抗体阳性者１５人，感染率为３９７％。其中精神病病人阳性７名（１１７％），归国人员阳性８名（２５％），两者有非常显著差异（Ｐ＜０．０１）。
Serum Toxoplasma gondii antibody was detected by indirect hemagglutination test (IHA) in 318 returnees and 60 psychiatric patients. A total of 15 antibody positive cases were found, with an infection rate of 3.97%. There were 7 positive patients (117%) and 8 returned patients (2.5%) with significant difference (P <0.01).