To isolate the Bacillus thuringiensis native strains from warehouses grain dusts in China and analyze their H antigen serotypes.
对我国部分省市粮食粉尘中的苏芸金芽孢杆菌（B t ）野生株的进行分离、纯化及H血清型鉴定。
Methods: We examined and observed 52 patients with typhoid and 20 normal controls by bacterial culture, Widal reaction, and enzyme-linked immunoassay for detection of typhoid bacilli H antigen.
方法该文采用细菌培养、肥达反应、伤寒杆菌H抗原酶联免疫检测检查52例伤寒患者，20例正常人，进行对照观察。
Methods:O-antigen was detected by slide agglutination, H-antigen by test tube, drug resistance by K-B method.
方法：玻片凝集法检测O抗原，试管凝集法检测H抗原；
Methods:O-antigen was detected by slide agglutination, H-antigen by test tube, drug resistance by K-B method.
方法：玻片凝集法检测O抗原，试管凝集法检测H抗原；
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