TABLE 1.
Defining criteria for the five categorical states of tuberculosis
| Categorical state of TB | Presence of criterion |
||||
|---|---|---|---|---|---|
| M. tuberculosis exposure | Person has viable M. tuberculosis pathogen | M. tuberculosis has metabolic activity to indicate ongoing or impending progression of infection | Radiographic abnormalities or microbiological evidence of active, viable M. tuberculosis | Person has symptoms suggestive of active M. tuberculosis disease | |
| Eliminated TB infection | ✕ | ||||
| Latent TB infection | ✕ | ✕ | |||
| Incipient TB infection | ✕ | ✕ | ✕ | ||
| Subclinical TB disease | ✕ | ✕ | ✕ | ✕ | |
| Active TB disease | ✕ | ✕ | ✕ | ✕ | ✕ |