Bioactivity of flurithromycin and other macrolides against intracellular susceptible staphylococci.

Abstract:

:The intracellular activity of flurithromycin, erythromycin, roxithromycin and miocamycin against susceptible clinical isolates of Staphylococcus aureus, phagocytosed by human monocytes, was investigated. Intracellular bioactivity was studied in a 24-hour assay, using experimental conditions which allowed the intracellular growth of bacteria. A colony counting method was used to differentiate between intracellular bacteriostatic and bactericidal activity of antibiotics. Moreover, the effect of macrolides against extracellular staphylococci was assessed. All agents showed higher intracellular than extracellular activity against staphylococci. At low concentration (0.1 mg/l) they had intracellular bacteriostatic activity. At concentrations higher than the minimal inhibitory ones (1 and 5 mg/l), miocamycin only still produced a bacteriostatic effect while flurithromycin, erythromycin and roxithromycin also showed intracellular bactericidal activity.

journal_name

Chemotherapy

journal_title

Chemotherapy

authors

Fietta A,Boeri P,Colombo ML,Merlini C,Gialdroni Grassi G

doi

10.1159/000238973

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

48-54

issue

1

eissn

0009-3157

issn

1421-9794

journal_volume

39

pub_type

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