 An important use of hand washing is to prevent the transmission of antibiotic resistant skin flora that cause hospital-acquired infections such as Methicillin-resistant "Staphylococcus aureus".While such flora have become antibiotic resistant due to antibiotics there is no evidence that recommended antiseptics or disinfectants selects for antibiotic-resistant organisms when used in hand washing.However, many strains of organisms are resistant to some of the substances used in antibacterial soaps such as Triclosan.