Activity of Various Sulbactam Compounds and Piperacillin/Tazobactam against Clinical Isolates of Different Gram-Negative Bacteria.

To provide direction for clinical application and pharmaceutical exploitation, the activity of sulbactam compounds and PIP/TAZ 8 : 1 against clinical isolates of Gram-negative bacteria (GNB, = 976) was evaluated according to Clinical and Laboratory Standards Institute (CLSI) 2019. By minimal inhibitory concentrations (MICs), the resistance rate of all GNB to AMP/SBT 2 : 1 (56.9-100%) was significantly higher than other drugs, except the resistance rate of (, = 204) to piperacillin/tazobactam (PIP/TAZ 8 : 1, 78.4%) which was close to it (76.5%). Additionally, the resistance rate of to other compounds except AMP/SBT 2 : 1 differed greatly, but that of (, = 205) varied rarely. In addition, (, = 204) and demonstrated low and high resistance rates, respectively. Compared with cefoperazone/sulbactam (CPZ/SBT 2 : 1), PIP/TAZ 8 : 1 had advantage in anti- (RR = 0.5and OR = 2.17) and anti- activity (RR = 0.88and OR = 1.27), while its activity against (: = 194, RR = 0.91, and OR = 1.12), (RR = 1.31 and OR = 0.41), and other Enterobacteriaceae (other : = 169, RR = 1.40, and OR = 0.62) was not better than CPZ/SBT 2 : 1. Although it had advantage against (RR = 0.60 and OR = 1.78), (RR = 0.67 and OR = 1.63), and (RR = 0.70 and OR = 2.05), the inhibition effect of piperacillin/sulbactam (PIP/SBT 2 : 1) against (RR = 0.94 and OR = 1.12) and other was just similar with CPZ/SBT 2 : 1 (RR = 0.93 and OR = 1.10). Furthermore, the anti- (RR = 0.70 and OR = 1.50), anti- (RR = 0.89 and OR = 1.24), and anti- (RR = 0.74 and OR = 1.46) activities of ceftazidime/sulbactam (CAZ/SBT 1 : 1) had a weak advantage, while its activity against (RR = 0.94 and OR = 1.15) and other (RR = 0.79 and OR = 1.36) was just close to CPZ/SBT 2 : 1. Moreover, the inhibitory effect of PIP/SBT 1 : 1 against all tested clinical species was more active than CPZ/SBT 2 : 1, while that of CAZ/SBT 2 : 1 against all species of bacteria analyzed was weaker than the controls.