This evaluation among household members in 430 US homes over a 3 week period showed that targeted hygiene procedures such as “using a shared laundry” (although not home laundry) and “not using bleach for laundry” were identified as significant risk factors for infection. But using antimicrobial cleaners for routine cleaning of floors, sinks, toilets, bathtub and dishwashing was not identified as significant. Public Health Nursing 2000;18:116.