[In vitro effect of rosoxacin on hospital bacteria. Results of a multicenter study].

This work reports a multicenter study of antibacterial activity of rosoxacin, a new antibacterial agent of the quinolone group. Enterobacteriaceae are very sensitive to rosoxacin (modal MIC 0,5 micrograms/ml); resistant strains are observed in all species, but more often among Serratia and Citrobacter. Pseudomonas aeruginosa is less sensitive with a maximum number of strains between 2 and 8 micrograms/ml, so it is nearly for Acinetobacter. Haemophilus are very sensitive, having MIC of 0,03 and 0,06 micrograms/ml. The spectrum of rosoxacin includes Gram positive bacteria, since the MIC of Staphylococci are similar to Enterobacteriaceae; Enterococci are less sensitive, the major part of the strains being inhibited by 4 and 8 micrograms/ml.