Exploratory descriptive study, developed in a governmental hospital of tertiary care in Minas Gerais (Brazil), from January 2008 to December 2009. Medical records and reports of control infection practitioner of 98 patients readmitted with SSI were reviewed and the data were analyzed in relation to gender, age, co morbidities, length of staying, surgery, specialty, type of procedures, wound class, duration of surgery, SSI and micro-organisms. Readmissions occurred in patients who underwent clean and potentially contaminated surgical procedures, with co morbidities commonly among people 50 years or older. Duration of surgery did not differ from the cut point recommended by CDC. Staphylococcus aureus predominated in orthopedic procedures and Escherichia coli in general surgery, both with multi-resistance profile below the results presented in other studies. Whereas the SSI occurred more frequently in clean surgeries and readmissions can provide information about the quality of care, these findings are important to control infection practitioner review the antibiotic prophylaxis protocols and surgical practices in patients undergoing clean and potentially contaminated procedures.