The nurse explains that the body's normal flora serves as:

Choice A rationale

Lowering the mask below the chin for reuse is incorrect because it can cause contamination. Masks should be discarded after each use to prevent the spread of infectious agents.

Choice B rationale

Removing the mask first before other PPE is incorrect because it can lead to self-contamination. The mask should be removed after the gown and gloves, following proper PPE removal protocols.

Choice C rationale

Discarding the mask only if it is wet and otherwise folding and storing it for reuse is incorrect. Masks should not be reused once they have been worn as they may harbor infectious agents.

Choice D rationale

Untying the bottom ties first, then the top, and disposing of the mask without touching it is correct because it prevents contamination of the hands and ensures safe disposal.

Choice A rationale

Limiting ambulation can increase the risk of complications such as deep vein thrombosis and does not necessarily reduce HAIs.

Choice B rationale

Encouraging the patient to turn, cough, and deep breathe every 2 hours helps prevent respiratory complications, improves lung function, and reduces the risk of pneumonia, a common HAI.

Choice C rationale

Keeping the room door closed does not prevent HAIs and might isolate the patient, reducing mobility and social interaction.

Choice D rationale

Regular monitoring of vital signs is essential but does not directly reduce the risk of HAIs. Other measures, like proper hygiene and mobilization, are more effective.