Disease measurement

Risk of M. tuberculosis transmission

Probability of passing M. tuberculosis to another individual. This may be influenced by factors such as the frequency of contact with the source person, proximity and duration of contact, use of respiratory protection, environmental factors, and infectiousness of the source person.

Prevalence surveys (for tuberculosis)

Studies to periodically measure tuberculosis burden in a particular country or setting. They usually measure bacteriologically confirmed TB in those ≥15 years of age.

Low tuberculosis incidence settings

Countries or distinct parts of countries characterized by a low burden of tuberculosis (with a tuberculosis incidence <10/100 000 population).

Inventory study for tuberculosis

Study conducted with the aim of assessing the number of detected persons with tuberculosis during a defined period of time by actively observing health providers’ practice, and then computing the proportion of detected cases not reported to health authorities.

High TB/HIV burden countries

20 countries with the highest estimated numbers of incident TB/HIV cases, plus the 10 countries with the highest estimated TB/HIV incidence that are not in the top 20 by absolute number (threshold: >10 000 estimated incident TB/ HIV cases per year).

Case notification

Reporting of all tuberculosis cases to an authority such as a health department or national surveillance system, as required by national laws or regulations.

TB DICTIONARY

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