Multicentre in-vitro evaluation of the susceptibility of Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis to ciprofloxacin, clarithromycin, co-amoxiclav and sparfloxacin.
Seven laboratories, including a reference laboratory, tested the susceptibility of Moraxella catarrhalis, Streptococcus pneumoniae and Haemophilus influenzae strains to ciprofloxacin, clarithromycin, co-amoxiclav and sparfloxacin with the Etest. A total of 976 strains were collected. The results with ciprofloxacin and sparfloxacin were consistent for all laboratories, while those with clarithromycin and co-amoxiclav were not. The agreement between Etest MICs and broth microdilution was: ciprofloxacin and sparfloxacin, >95%; clarithromycin for all species, 71-85%; co-amoxiclav for H. influenzae, 31%. MIC90 values (broth dilution, mg/L) for M. catarrhalis, S. pneumoniae and H. influenzae were: sparfloxacin, 0.06, 0.5, 0.03; ciprofloxacin, 0.12, 2.0, 0.03; co-amoxiclav, 0.25, 0.25, 0.25; clarithromycin 0.25, 0.25 and 16.
Hoogkamp-Korstanje
J A
JA
Department of Medical Microbiology of University Hospital St Radboud, Nijmegen, The Netherlands.
Dirks-Go
S I
SI
Kabel
P
P
Manson
W L
WL
Stobberingh
E E
EE
Vreede
R W
RW
Davies
B I
BI
D000658:Amoxicillin / Q000494:pharmacology; D019980:Amoxicillin-Potassium Clavulanate Combination; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D000890:Anti-Infective Agents / Q000494:pharmacology*; D002939:Ciprofloxacin / Q000494:pharmacology*; D017291:Clarithromycin / Q000494:pharmacology*; D002969:Clavulanic Acids / Q000494:pharmacology; D004341:Drug Evaluation; D004359:Drug Therapy, Combination / Q000494:pharmacology*; D024841:Fluoroquinolones; D006193:Haemophilus influenzae / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D001936:Moraxella catarrhalis / Q000187:drug effects*; D015363:Quinolones / Q000494:pharmacology*; D013296:Streptococcus pneumoniae / Q000187:drug effects*
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D002969:Clavulanic Acids; D024841:Fluoroquinolones; D015363:Quinolones; D002939:Ciprofloxacin; D019980:Amoxicillin-Potassium Clavulanate Combination; D000658:Amoxicillin; D017291:Clarithromycin; C061363:sparfloxacin