Susceptibility of bacteria isolated from non-parenteral preparations applied in paediatric hospitals to antibiotics.

No strains resistant to all tested antibiotics were found among the 33 Gram-positive and 17 Gram-negative bacteria isolated from non-parenteral drugs and purified water. Three strains: S. aureus, coagulase-negative staphylococcus and B. cereus have been found to be resistant to 6-8 antibiotics, whereas six Gram-negative strains belonging to Enterobacter agglomerans and Ps. aeruginsosa were resistant to 6-12 antibiotics. The most effective agent against all tested Gram-positive bacteria was cephaloridine, and erythromycin against the staphylococci. Tetracycline and ceftazidim were the least effective. Gentamycin was the only antibiotic effective to all Gram-negative strains, and ceftazidim to most of them. Cefsulodin was ineffective to Ps. aeruginosa.