human hands are most important tool for caring,hands feel,diagnose and cure. hands also can be a portal of transmission of infections,while hand washing may be the simplest way to control infection. most agrees hand washing in important tool in control of infection, purpose of hand washing , 1.

remove debris & microorganism from nail ,hand and forearm 2.reduce microbial counts 3.inhibit growth of micro organism which agent or soap is ideal for hand washing in ot? how much time is adequate for effective hand washing? what is ideal temperature of water for hand washing?