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  • Title: [Comparative activities of 15 beta-lactam antibiotics against 590 strains of Klebsiella pneumoniae according to the production of beta-lactamase].
    Author: Bercion R, Meyran M, Labia R, Thabaut A.
    Journal: Pathol Biol (Paris); 1991 May; 39(5):353-60. PubMed ID: 1881669.
    Abstract:
    In October 1988, all non repetitive strains of K. pneumoniae isolated in 17 hospitals have been studied. Among these 590 strains: 451 (76%) only produce the specific beta-lactamase of the species SHV-1 (pI 7,7) or SHV-1 type (pI 7,1), while 74 (12.5%) produce a TEM-1 or TEM-2 type beta-lactamase, and 65 (11%) an extended broad spectrum beta-lactamase: 22 CTX-1, 5 SHV-2, 4 SHV-3, 26 SHV-4, 8 SHV-5. The minimum inhibitory concentrations of the following antibiotics were performed by a liquid micro dilution technic: amoxicillin (AMX), amoxicillin + clavulanic acid (CL), 5 mg/l, ticarcillin (TIC), piperacillin (PIP), cefazolin (CEZ), cefamandole (CFM), cefoperazone (CFP), cefotaxime (CTX), cefotaxime + clavulanic acid 5 mg/l, cefotaxime + sulbactam (SUL) 5 mg/l, cefpirome (CPI), ceftazidime (CAZ), azthreonam (AZT), latamoxef (MOX), cefoxitin (FOX), cefotetan (CTT), temocillin (TMO), imipenem (IMI). The "wild" strains with SHV-1 beta-lactamase are resistant to AMX and have a decreased susceptibility to TIC and PIP, but are susceptible to other antibiotics. The TEM producing strains are more resistant to PIP and TIC, have a decreased susceptibility to CEZ and CFM but are susceptible to other antibiotics. For the extended broad-spectrum beta-lactamase producing strains, the MIC of penicillin antibiotics (AMX, TIC, PIP) are very high and also the MIC of CEZ, CFM and CFP. The MIC of CTX are higher for CTX-1 or SHV-4 producing strains, than for SHV-2, SHV-3, or SHV-5 producing strains. The combination with CL is more efficacious than the one with SUL to reduce the MIC of CTX in susceptibility area.(ABSTRACT TRUNCATED AT 250 WORDS)
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