Which of the following statements concerning surgical wounds is TRUE?
A)Any microorganism present in a wound must be causing infection. B)Surgery involving body sites with a microbiota have a high risk of infection. C)Almost all infections occur during dressing changes. D)Risk of infection is reduced if the preoperative hospitalisation time of the patient is increased. E)Multi-resistant Staphylococcus aureus (MRSA)causes all surgical wound infections.