Nazer H, Greer W, Donnelly K, Mohamed A E, Yaish H, Kagalwalla A, Pavillard R
Dept of Paediatrics, King Faisal Specialist Hospital & Research Centre, Riyadh, Kingdom of Saudi Arabia.
Br J Clin Pract. 1993 Mar-Apr;47(2):76-8.
This study was designed to test whether three sequential stool specimens are necessary for reliable detection of intestinal parasites in routine laboratory examinations. There were 175 patients in whom a single species of intestinal parasite or ova was identified on at least one occasion when three stool specimens were examined over a period of 14 days from the first recorded specimen. Examination of a first stool specimen detected parasites and/or ova in 102/175 patients (58.3%); examination of a second specimen identified an additional 36 positive patients (20.6%) and examination of a third specimen yielded a final 37 previously undetected patients (21.1%). These findings indicate that at least three stool specimens should be examined to confirm the presence of intestinal parasites. Even with such practice, it is not possible to guarantee that there is no infestation, but examination of fewer specimens would run a definite risk of false negative results.
本研究旨在测试在常规实验室检查中，连续检测三份粪便标本对于可靠检测肠道寄生虫是否必要。共有175例患者，在从首次记录的标本起14天内对三份粪便标本进行检查时，至少有一次检测出单一肠道寄生虫种类或虫卵。对第一份粪便标本的检查在102/175例患者（58.3%）中检测到寄生虫和/或虫卵；对第二份标本的检查又发现了36例阳性患者（20.6%），对第三份标本的检查最终发现了37例之前未检测出的患者（21.1%）。这些结果表明，至少应检查三份粪便标本以确认肠道寄生虫的存在。即便如此操作，也无法保证没有感染，但检查的标本数量较少会有出现假阴性结果的明确风险。
