Characterization of a novel class A carbapenemase PAD-1 from Paramesorhizobium desertii A-3-ET, a strain highly resistant to β-lactam antibiotics oleh Ruichen Lv, Jingyu Guo, YanFeng Yan, Rong Chen, Lisheng Xiao, Min Wang, Nan Fang, Chengxiang Fang, Yujun Cui, Ruifu Yang, Yajun Song