TB patients and people with suspected TB are to be considered infectious if they:
Have PTB disease (lungs, airway or larynx)
Are coughing or are undergoing cough inducing procedures
Have sputum smears positive for AFB
These TB patients may be considered infectious if they are not on anti-TB treatment or have just started anti-TB treatment, or if they have a poor clinical or bacteriologic response to anti-TB treatment.
