近年来,不少临床工作者发现伤寒患者的肥达氏反应阳性率下降,有的血培养阳性而肥达氏反应阴性,且许多血清型沙门氏菌及肠杆菌与O、H抗原发生交叉反应,有些发热的非伤寒患者出现假阳性反应,以致许多人对肥达氏反应的诊断价值提出怀疑。本文根据近几年我院收治的经培养证实为伤寒 In recent years, many clinicians found that typhoid fever patients decreased the positive rate of Widal, and some blood culture positive and negative Widal reaction, and many serotypes of Salmonella and Enterobacteriaceae and O, H antigen cross-reaction, and some False-positive reactions occur in febrile non-typhoid fever, causing many to question the diagnostic value of the Widal reaction. This article is admitted in accordance with the hospital in recent years confirmed by the culture of typhoid fever