SENSITIVITY TO ANTIBACTERIALS OF STAPHYLOCOCCUS-AUREUS ISOLATED FROM DIFFERENT TYPES OF SKIN INFECTIONS

We examined the antibacterial susceptibility of Staphylococcus aureus isolated from several types of skin infections, which were classified into four groups: (i) impetigo, (ii) folliculitis, (iii) atopic dermat itis and eczema and (iv) ulcers and decubitus. The 50% minimal inhibit ory concentration (MIC(50)) of the antibacterial agents was 3.13 mu g/ ml or lower, except that of gentamicin with isolates from the impetigo groups (25 mu g/ml). The MIC(90) of gentamicin was 50 mu g/ml or more for isolates from all four groups. The isolates from the ulcers and d ecubitus group showed multiple resistance against antibacterial agents . The frequency of methicillin-resistant S. aureus was low, but was hi ghest, at 25%, in the isolates from the ulcers and decubitus group. Fe w isolates from the atopic dermatitis and eczema group were resistant, and there was little difference in antibacterial resistance between i solates from atopic dermatitis and eczema.