答:超广谱β-内酰胺酶(ESBLs),它是由质粒介导,可水解青霉素类、头孢菌素类(主要为第三代头孢菌素,如头孢他啶、头孢噻肟等)和单环β-内酰胺类(氨曲南)抗生素的一类酶。通常不水解头孢霉素类(头孢西丁、头孢美唑等)和碳青霉烯类(亚胺培南、美罗培南等)。其活性可以被克拉维酸、舒巴坦、他唑巴坦等β-内酰胺酶抑制剂所抑制。肺炎克雷伯菌、产酸克雷伯菌、大肠埃希菌、奇异变形杆 A: Extended spectrum β-lactamases (ESBLs), which are plasmid-mediated, hydrolyzable penicillins, cephalosporins (mainly third generation cephalosporins, such as ceftazidime, cefotaxime, etc.) and single Cyclo-β-lactams (aztreonam) antibiotics a class of enzymes. Cephalosporins (cefoxitin, cefmetazole, etc.) and carbapenems (imipenem, meropenem, etc.) are usually not hydrolyzed. Its activity can be inhibited by clavulanic acid, sulbactam, tazobactam and other β-lactamase inhibitors. Klebsiella pneumoniae, Klebsiella oxytoca, Escherichia coli, bizarre deformation rod