Final answer:
Kathy must engage in thorough hand hygiene by washing with soap and warm water for at least 20 seconds, covering all hand surfaces and following CDC guidelines, to prevent infection spread.
Step-by-step explanation:
The minimal hand hygiene required for Kathy after getting a wet, sticky substance on her hand when delivering a meal tray to Mr. Potter involves immediate thorough cleaning. This means washing her hands with soap and warm water, following the CDC recommendations. They outline a five-step process: wetting hands with running water, applying soap, lathering and scrubbing all hand surfaces including the backs of hands, between fingers, and under nails for at least 20 seconds, rinsing hands well under clean running water, and finally drying hands with a clean towel or air dryer. In a healthcare setting as mentioned in the scenario, it is critical for Kathy to follow clinically recommended handwashing procedures to prevent the spread of infection.