Methods Subjects were collected from community population by stratified multi-stage cluster sampling method. The data gathered from case investigation and serological detection.
方法对社区人群采用多阶段分层整群随机抽样方法抽取研究对象，进行个案调查和血清学检测。
Methods the phage was identified by detection of the host range, calculation of phage plaque, negative staining for TEM, serological neutralization test and one step growth experiment.
方法采用宿主范围测定、噬菌斑计数、负染色电镜观察、血清中和试验及血清交叉中和试验、一步生长实验等技术观察分离的噬菌体。
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