Classification of TB for those individuals who are also HIV-positive differs slightly from the classification categories described before. They are all category I patients, but can be further classified into one of three revised sub-categories. This revision was introduced by the WHO in 2009 and you will need to be aware of these revised categories for registration and the follow-up of patients with both diseases. The revised sub-categories are listed below:

1. Smear-positive pulmonary tuberculosis (one or more sputum smears found to be positive for TB bacteria)
2. Smear-negative pulmonary tuberculosis
3. Extra-pulmonary tuberculosis.