volume 61, issue 3, P406-409 1978
DOI: 10.1542/peds.61.3.406
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W. E. Feldman

Abstract: Synergy, determined by isobolograms constructed from the minimal inhibitory concentrations of combinations of ampicillin and chloramphenicol, was observed against six of 13 ampicillin-susceptible Haemophilus influenzae type b isolates and against five of eight ampicillin-resistant strains by using a small inoculum of 10(4) colony forming units (CFU) per milliliter. Synergy occurred against nine of 13 ampicillin-susceptible and against two of eight ampicillin-resistant strains using a large inoculum of 10(7) CF…

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