^pof;
Animal;
Husbandry;
and;
Veterinary;
Science;
Henan;
Agricultural;
University;
Zhengzhou;
450002;
P.R.;
China;
^pof;
Chemical;
and;
Biological;
Engineering;
Zhejiang;
University;
Hangzhou;
310027;
P.R.;
China;
肺炎克雷伯菌; M基因; 中国; 分离鉴定; 病鸡; β-内酰胺酶; 不相容质粒; PCR扩增;