The page below is a sample from the LabCE course Tuberculosis Awareness for Health Care Workers. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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How Tuberculosis is Spread

Mycobacterium tuberculosis is spread through infectious droplet nuclei. When a person infected with pulmonary tuberculosis coughs, sneezes, shouts, or sings, the infectious particles are expelled into the air. The risk of infection is related to both concentration of infectious droplet nuclei and duration of exposure.

Laboratory workers are at risk when an infectious aerosol is generated while handling liquid cultures, during preparation of frozen sections, and when performing autopsies on infected patients.