[Serotypes and drug susceptibility of Pseudomonas aeruginosa isolated from clinical specimens].
Between January, 1982 and December, 1994, 236 Pseudomonas aeruginosa strains were isolated from clinical specimens at our division, and were tested for serotypes and drug-susceptibilities to 15 antibiotics. Serotype G strains were isolated at the highest frequency (32.6%), and followed by strains of serotype B (15.7%), A (11.9%), E (9.3%), I (7.2%), F and M (5.5%), non-typable (5.1%), D (3.4%), H (2.1%), C and K (0.8%). We examined the changes of isolation frequencies of different serotypes annually. Isolation frequencies of serotypes E and F showed tendency to decrease, whereas serotype I has been isolated increasingly year by year. MIC90's of the 15 antibiotics were as follows, tosufloxacin: 0.78 microgram/ml, biapenem (BIPM) and ofloxacin (OFLX): 3.13 micrograms/ml, imipenem (IPM), ceftazidime, cefozopran, cefsulodin and gentamicin: 6.25 micrograms/ml, aztreonam and amikacin: 12.5 micrograms/ml, piperacillin, cefoperazone and minocycline (MINO): 25 micrograms/ml, fosfomycin: > 100 micrograms/ml and chloramphenicol: > 200 micrograms/ml. MIC90'S of IPM, BIPM, MINO and OFLX increased 4-fold from stage I (1982-1987) through stage III (1992-1994) and the isolation frequency of drug-resistant strains increased year by year. In other words, antibiotic resistant strains appeared increasing with time. No relationship between serotypes and drug-resistance were observed.
Nakae
M
M
Department of Clinical Laboratory, Nippon Dental University, School of Dentistry at Niigata.
Sugahara
Y
Y
Sasaki
H
H
Yasui
H
H
Imai
C
C
Hasegawa
Y
Y
Osaka
K
K
Shibasaki
K
K
D000900:Anti-Bacterial Agents / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D011550:Pseudomonas aeruginosa / Q000187:drug effects* / Q000302:isolation & purification*; D012703:Serotyping
D000900:Anti-Bacterial Agents