Bactericidal activity of beta-lactams and amikacin against Haemophilus influenzae: effect on endotoxin release.
Ampicillin or cefotaxime, alone or in combination with amikacin, were tested at levels achievable in CSF for bactericidal activity against eight clinical isolates of Haemophilus influenzae serotype b. Endotoxin release was determined by the limulus amoebocyte lysate test and by macrophage tumour necrosis factor production for each beta-lactam antibiotic, alone and in combination with amikacin. Accelerated killing was observed when amikacin was added to ampicillin or cefotaxime; however, the additional antibiotic-induced bacterial lysis observed after the addition of amikacin to beta-lactam antibiotics was not associated with an increase in endotoxin release.
Bingen
E
E
Laboratoire de Microbiologie, Hôpital Robert Debré, Université Paris VII, France.
Goury
V
V
Bennani
H
H
Lambert-Zechovsky
N
N
Aujard
Y
Y
Darbord
J C
JC
D000583:Amikacin / Q000494:pharmacology*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D004731:Endotoxins / Q000378:metabolism*; D006193:Haemophilus influenzae / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D066298:In Vitro Techniques; D007223:Infant; D007700:Kinetics; D008033:Limulus Test; D008264:Macrophages / Q000187:drug effects; D051379:Mice; D008826:Microbial Sensitivity Tests; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D047090:beta-Lactams
D000900:Anti-Bacterial Agents; D004731:Endotoxins; D014409:Tumor Necrosis Factor-alpha; D047090:beta-Lactams; D000583:Amikacin