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饮用水经处理后仍可能被少量的微小隐孢子虫卵囊所污染。正常人及免疫抑制者如果饮用了此种污染的水,可引起腹泻性疾病。因使人体患病所需的病原体数量尚不明了,作者就此对健康成人的感染进行了研究。 对29名无微小隐孢子虫感染(ELISA测定无特异性抗隐孢子虫抗体)的健康志愿者,一次给予30至100万个自牛粪中分离的
Potable water may still be contaminated with a small amount of Cryptosporidium parvum oocysts after treatment. Normal people and immunosuppressed who drink such contaminated water can cause diarrheal diseases. Because of the unknown number of pathogens needed to make the human body sick, the authors studied the infection in healthy adults. Thirty-nine healthy volunteers without Cryptosporidium parvum infection (non-specific anti-Cryptosporidium antibodies assayed by ELISA) were given one to one million isolations from cow dung