本文对142例胃镜受检者用脲酶反应检测其胃粘膜内的幽门弯曲菌(CP),结合直接涂片及培养,认为脲酶阳性反应时间宜限制在3小时以内。此时由于CP菌量多,敏感性与特异性可达100%。若阳性反应时间在3～24小时,仅约半数涂片CP阳性,且菌量少;因同时存在其它可产生脲酶阳性反应的杂菌,如变形杆菌等,故阳性特异性仅50%。 In this paper, 142 cases of gastroscopy were detected by urease reaction in the gastric mucosa of Pylorus Campylobacter (CP), combined with direct smear and culture, that urease-positive reaction time should be limited to less than 3 hours. At this point due to CP bacteria and more sensitivity and specificity of up to 100%. If the positive reaction time in 3 to 24 hours, only about half of the smear CP positive, and less bacteria; due to the simultaneous presence of other urease-positive bacteria such as Proteus, the positive specificity of only 50%.