Use of Antimicrobial Drugs in General Hospitals. II. Analysis of Patterns of Use

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Abstract
The hospital charts were surveyedof 5,288 patients in 20 hospitals that were randomly selected from the 194 general hospitals in Pennsylvania. Antimicrobial drugs were administered to 28% of the patients, with little variation in pattern according to hospital size. Surgical services accounted for 61%of the patients who received antimicrobial drugs, and the proportion of patients receiving such drugs varied from 84% on thoracic and cardiovascular surgical services to 13% on obstetrical services. General medicine accounted for 29% of the patients who received antimicrobial drugs and pediatrics for 9%. Eight percent of the hospital population accounted for 50% of all antimicrobial drugs used. Ampicillin was the most frequently used drug, being given in 22% of all courses, with cephalosporins (18%), benzylpenicillins (14%), and tetracycline (13%) next in order. Approximately 30% of the antimicrobial courses were used for prophylaxis.

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