R. Nau et al., RIFAMPIN FOR THERAPY OF EXPERIMENTAL PNEUMOCOCCAL MENINGITIS IN RABBITS, Antimicrobial agents and chemotherapy, 38(5), 1994, pp. 1186-1189
Rifampin at a maximally effective dose was less active than ceftriaxon
e (both drugs at 10 mg/kg of body weight.h) in a rabbit model of pneum
ococcal meningitis (Delta log(10) CFU/ml.h, -0.40 +/- 0.13 versus -0.7
7 +/- 0.18; P < 0.01). The bactericidal activity of rifampin decreased
at concentrations in cerebrospinal fluid greater than those that are
clinically achievable, and use of rifampin in combination with ofloxac
in had no synergistic or additive effect.