an increasing trendp < 0.05
The rates of Klebsiella pneumoniae resistance to piperacillin/tazobactam, ticacillin/clavulanate, cefazolin, cefuroxime sodium, cefotaxime, ceftriaxone, ceftazidime, cefotetan, amicacin, tobramycin, gentamicin, norfloxacin, and ciprofloxacin showed an increasing trend ( p < 0.05).