The European journal of general practice
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Multicenter Study
Previous antibiotic exposure and antibiotic resistance of commensal Staphylococcus aureus in Spanish primary care.
Commensal flora of healthy people is becoming an important reservoir of resistant bacteria. ⋯ Although no causal inference is possible, an association was observed between previous antibiotic dispensation and isolation of resistant organisms in community-dwelling individuals, mainly between packages of penicillin and penicillin-resistant staphylococci.