Senay H, MacPherson D
Regional Parasitology Laboratory, St. Joseph's Hospital, McMaster University, Hamilton, Ont.
CMAJ. 1989 Jun 1;140(11):1329-31.
To assess the need for routinely submitting three stool samples per patient for recovery of enteric parasites, we reviewed the records of our parasitology laboratory for 1985-87 to determine the number of parasites that would not have been detected if only one or two samples had been submitted. A total of 16% of all stool samples were positive. For each sample that was positive for a parasite (index sample) a search was done for other stool samples, positive or negative, received from the same patient within 6 days of reception of the index sample. We identified 676 sets of two (276) or three (400) samples of which at least 1 was positive. A total of 93% of the enteric parasites were detected in the first sample in the two-sample sets. Among the three-sample sets 90% of the parasites were detected in the first sample, 8% in the second and 2% in the third. We recommend waiting for the result from the first stool sample rather than routinely submitting three samples for recovery of enteric parasites.
为评估每位患者常规提交三份粪便样本以检测肠道寄生虫的必要性，我们查阅了1985 - 1987年寄生虫学实验室的记录，以确定若仅提交一份或两份样本时无法检测到的寄生虫数量。所有粪便样本中共有16%呈阳性。对于每份寄生虫检测呈阳性的样本（索引样本），我们查找了在索引样本接收后6天内从同一患者处收到的其他粪便样本，无论其阳性或阴性。我们确定了676组两份（276组）或三份（400组）样本，其中至少有一份呈阳性。在两份样本组中，93%的肠道寄生虫在第一个样本中被检测到。在三份样本组中，90%的寄生虫在第一个样本中被检测到，8%在第二个样本中，2%在第三个样本中。我们建议等待第一份粪便样本的结果，而非常规提交三份样本以检测肠道寄生虫。
