Yes, if they have TB disease and it is not being treated. Once treatment begins, a patient ordinarily quickly becomes noninfectious; that is, they cannot spread the disease to others.There is little danger from the TB patient who is being treated, is taking his or her medication continuously, and is responding well. The drugs usually make the patient noninfectious within weeks.TB is spread by germs in the air, germs put there by coughing or sneezing. Handling a patient’s bed sheets, books, furniture or eating utensils does not spread the infection.Brief exposure to a source of TB rarely infects a person. It’s day-after-day close contact that usually does it.