Influence of dosage interval on the therapeutic response to gentamicin in mice infected with Klebsiella pneumoniae.

Abstract:

:Without treatment all mice died after receiving 10(3) Klebsiella pneumoniae by intraperitoneal injection. Nevertheless, it was possible to delay treatment for 12 h and still observe a therapeutic response from im gentamicin (5 mg/kg). This gave initial serum concentrations comparable to clinical levels, which fell rapidly (t 1/2 = 15 min) to reach the limit of detection by 90 min. Courses were given of 3 or 6 doses spaced at different intervals. Irrespective of dosage interval there was a marked fall in bacteraemia with each of the first two doses. Between doses separated by 8 or even 12 h there was no evidence of bacterial multiplication but this was obvious by 24 h. Both the bacteraemic responses and the lengths of survival were best with the 12-hour dosage interval. These results are consistent with other reports of the persistence of antibiotic effects despite undetectable serum concentrations and the compatibility of a substantial dosage interval with a successful therapeutic outcome.

journal_name

Chemotherapy

journal_title

Chemotherapy

authors

Queiroz ML,Bathirunathan N,Mawer GE

doi

10.1159/000238477

subject

Has Abstract

pub_date

1987-01-01 00:00:00

pages

68-76

issue

1

eissn

0009-3157

issn

1421-9794

journal_volume

33

pub_type

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