Natural antibiotic susceptibility of Rahnella aquatilis and R. aquatilis-related strains.

摘要: A database is described of the natural susceptibilities 70 Rahnella strains to 71 antibiotics. MIC values were determined by a microdilution procedure and evaluated table calculation program. aquatilis R. aquatilis-related naturally resistant amoxycillin, ticarcillin, fosfomycin antibiotics which other species Enterobacteriaceae are also intrinsically resistant, i.e. macrolides (except azithromycin), benzylpenicillin, oxacillin, rifampicin, fusidic acid, lincosamides glycopeptides. or intermediate cefazolin, cefuroxime loracarbef. All rahnellae sensitive doxycycline, minocycline, aminoglycosides, some penicillins cephalosporins, carbapenems, aztreonam, quinolones, sulfamethoxazole, trimethoprim, cotrimoxazole, chloramphenicol nitrofurantoin. Bimodal broad distributions seen for several antibiotics, e.g. quinolones cephalosporins. With exception no differences in antibiotic susceptibility between reference genomovar 1 (n=6) 2 (n=7). Reference pyrase-positive more susceptible than 2, pyrase-negative. By discrimination all pyrase-negative became smaller unimodal. Under conditions pyrase might be parameter differentiate genomovars 2.