<prompt> In a surgical post-op ward, a pt. developed wound infection. Subsequently 3 other pts. developed smilar infections in the ward. What is the most effective way of preventing the spread of infection -Give IV antibiotics to all pts. in the wardProper handwashing of all ward personnelsFumigation of the wardWash OT instrumens with 1 perchlorate  <response>: Ans. is b ie. Proper hand washing of all ward personnels Given the prominence of cross infection, hand washing is the single most impoant preventive measure in the hospital - Harrison 15e Harrison 17e writes- Given the prominence of cross-infection, hand hygiene is the single most impoant preventive measure in hospitals. Use of alcohol hand rubs between patient contacts is now recommended for all health care workers except when the hands are visibly soiled, in which case washing with soap and water is still required. 