Are People Infected with M

Are people infected with M. tuberculosis always highly infectious to everyone around them?

A) Yes. The infected person is constantly shedding bacteria to the environment around them in high numbers, facilitating transmission.
B) No. While in the early stages of the illness, the infected person does not have the cough required to spread the organism in respiratory droplets very easily.
C) Yes. As the mode of transmission of M. tuberculosis is direct contact, anyone or anything the infected person touches can be infected.
D) No. TB has a very high infectious dose. In the early stages of the disease, the patients aren't producing enough bacteria in their respiratory secretions to be infectious.
E) Yes. Mycobacterium tuberculosis is shed in all body secretions as well as in respiratory droplets, so is very easily spread.

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