Surgical Wound Infection - prevention & control, Anti-Bacterial Agents - therapeutic use, Appendectomy, Surgical Wound Infection - epidemiology, Bandages, Humans, Bacteriological Techniques, Enterobacteriaceae - isolation & purification, Random Allocation, Surgical Wound Infection - microbiology
Surgical Wound Infection - prevention & control, Prospective Studies, Humans, Middle Aged, Clinical Trials as Topic, Rectum - surgery, Random Allocation, Surgical Equipment, Colon - surgery