Correspondence & B. Re text.p65

Of the 1772 pus samples obtained from ambulatory patients, a total of 961 bacterial strains were obtained of which 711 (74%) were Gram-positive and 250 (26%) Gram-negative. In this group also, the predominant organisms were S. aureus (62%) and P. aeruginosa (10%) but with varying isolation rates (Table). Thirty per cent of S. aureus isolates showed resistance to oxacillin. Vancomycin was uniformly active. All Group A beta haemolytic Streptococci were susceptible to penicillin, 11 per cent were resistant to erythromycin. Among the Gram-negative bacilli, 48.8 per cent were ESBL producers.