Transmission Based Precautions


Spread by disease particles emitted from an infected person’s coughing, sneezing, or talking. Particles are small and can spread long distances.

Examples include chickenpox, measles, and tuberculosis.

In addition to standard precautions, a properly fitting N95 Respirator mask should be worn by caretakers. If possible, the patient should be placed in a negative pressure room. The patient should wear a face mask when being transferred.


Spread by contact with an infected person’s mucous membranes, wounds, feces, urine, vomit, or other bodily fluids.

Examples include scabies, salmonella, norovirus, Clostridium difficile (C. diff).

Standard precautions should be observed at all times, with special consideration of hand hygiene. For more resistant diseases such as norovirus, a bleach solution should be used to clean surfaces.


Spread when droplets from coughing, sneezing, and talking deposit in a host’s nasal passages or mouth. Droplets typically do not travel more than 3 feet.

Examples include diphtheria, influenza, pertussis (whooping cough), rhinovirus (common cold).

In addition to standard precautions, a mask should be worn by caretakers/visitors, as well as the patient if they are being transferred.

All About Transmission Based Precautions

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