Objectives To examine the drug resistance of methicillin-resistant Staphylococcus aureus(MRSA)and to study the genes responsible for that resistance and the epidemiological characteristics of MRSA infection for better infection control and clinical treatment.S.aureus was isolated from patients undergoing cardiopulmonary bypass at the Central Hospital of the City of Nanyang from 2011 to 2013. Methods Drug sensitivity testing was performed with 217 isolates of S.aureus,and MRSA was screened using the K-B cefo...