With the variable middle region of the omlA gene and the specificlty of the apx gene and the cps gene, a typing system of three multiplex PCRs was established. By the PCR system, 11 out of the 12 reference strains of Actinobacillus pleuropneumoniae were d%根据外膜蛋白基因中间部分的差异,毒素基因和荚膜基因的型特异性,建立3个多重PCR的分型体系,可将Appl-12型分成11个模式,除9型和11型外完全区分。此分型体系用于3株野毒株的分型,得出的结果和血清学分型一致。对人工发病猪扁桃体、肺脏、鼻拭子各12份分型结果与已知血清型一致。将该分型系统直接用于,临床病料的鉴定并分型,实验从35份临床可疑病料中检测出2份阳性,均为7型,从健康猪扁桃体350份中检测出5份阳性,一份为4型,一份为12型,一份为3型,2份为7型。
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