Final answer:
OSHA is responsible for Blood-Borne Pathogens Standards requiring contaminated surfaces to be disinfected between patients, even without visible evidence.
Step-by-step explanation:
The agency responsible for the Blood-Borne Pathogens Standards that requires contaminated surfaces to be disinfected between patients, even if no evidence of contamination is visible, is OSHA (Occupational Safety and Health Administration). OSHA sets and enforces protective workplace safety and health standards to ensure a safe and healthy working environment. This includes regulations that require employers to protect their workers from blood-borne pathogens by implementing appropriate controls, such as using disinfectants and ensuring that surfaces are clean between patient interactions.