Methods The variable region of integron was amplified by integron PCR.
方法整合子PCR法扩增整合子的可变区；
2
Conclusion class 1 integron was very universal in clinical gram negative bacilli and class 2 integron was lesser.
结论1类整合子在革兰阴性杆菌中普遍存在，2类整合子相对较少。
3
Methods PCR screening and DNA sequence were used to determine the drug resistance genes associated with class I integron in 4 clinical strains of P. aeruginosa.