Post operative Infection is the most common  complication  , that it is
   demonstrated by studies and morning reports in education sections. The
   most important composition way is preventive, that this isn’t possible unless
   with recognition of the infection incidence method and transmission ways,
   therefore the study of operation room space, surgical device and patient
   body is important.

          This study is descriptive cross-sectional that 1085 cases prepared from
   operation room space, surgical device and patient body than it cultured in
   EMB and coccolate.

          240 case was contaminated and the infection incidence rate was 22% , 
   and the most abundance of contamination place was operation room
   (186 case equal to 77.5%). The most abundance of microbial was
   micrococcus and E.coli (150 case equal to 62.5%), bactries were sensitive to
   gentamicin and ciprofloxacin (72.8%) and were resistance to ampicillin and
   amoxicillin (75%).

          This study demonstrated the prevalence rate of infection in operation
   room in comparison to world standards  (5%) were high.