Which disinfection level effectively kills bacteria, TB, fungi, and some spores?

High level disinfection is the correct answer because it is designed to eliminate a wide range of pathogens, including bacteria, tuberculosis (TB), fungi, and certain spores. This level of disinfection is critical in healthcare settings where the risk of infection is high, particularly for items that come into contact with mucous membranes or intact skin.

High level disinfectants are typically used for medical instruments that cannot withstand heat sterilization and require a thorough disinfection process to ensure they are safe to use. The efficacy of high level disinfection in killing a broad spectrum of microorganisms makes it essential in infection control practices, particularly in preventing healthcare-associated infections.

In contrast, intermediate level disinfection is effective against a more limited range of pathogens, particularly vegetative bacteria and some viruses, but may not reliably kill all bacterial spores or TB. Low level disinfection is primarily effective against low-risk pathogens and is generally not sufficient for items that require a high level of sterility. Basic cleaning does not involve the use of disinfectants and is focused on the removal of dirt and debris without necessarily killing pathogens. Thus, high level disinfection stands out as the necessary approach for comprehensive infection control.