Tuberculosis classification: Difference between revisions
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==CDC TB Classification for Immigrants and Refugees== | ==CDC TB Classification for Immigrants and Refugees== | ||
Tuberculosis classification for immigrants and refugees according to the U.S. Citizenship and Immigration Services, developed by the [[Centers for Disease Control and Prevention]] ([[CDC]]):<ref name=CDC2>{{cite web | title = TB Classification US Citizenship and Immigration Services | url = http://www.cdc.gov/immigrantrefugeehealth/pdf/tuberculosis-ti-2009.pdf }}</ref> | |||
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Applicants who have a [[tuberculin skin test]] ≥10 mm or positive [[IGRA]] but otherwise have a negative evaluation for tuberculosis<br> | Applicants who have a [[tuberculin skin test]] ≥10 mm or positive [[IGRA]] but otherwise have a negative evaluation for tuberculosis<br> | ||
The size of the [[TST]] reaction or [[IGRA]] result, the applicant’s status with respect to latent TB infection treatment, and the medication(s) used should be documented<br> | The size of the [[TST]] reaction or [[IGRA]] result, the applicant’s status with respect to latent TB infection (LTBI) treatment, and the medication(s) used should be documented<br> | ||
For applicants who had more than one [[TST]] or [[IGRA]], all dates and results and whether the applicant’s [[TST]] or [[IGRA]] converted should be documented<br> | For applicants who had more than one [[TST]] or [[IGRA]], all dates and results and whether the applicant’s [[TST]] or [[IGRA]] converted should be documented<br> | ||
Contacts with [[TST]] ≥5 mm or positive [[IGRA]] should receive this classification (if they are not already Class B1 TB, Pulmonary) | Contacts with [[TST]] ≥5 mm or positive [[IGRA]] should receive this classification (if they are not already Class B1 TB, Pulmonary) |
Revision as of 22:06, 5 September 2014
Tuberculosis Microchapters |
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Tuberculosis classification On the Web |
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Risk calculators and risk factors for Tuberculosis classification |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]
Overview
Classification
Below is a table with the current classification system of tuberculosis (TB), based on its pathogenesis:[1]
Class | Type of Tuberculosis | Description |
---|---|---|
0 |
No TB exposure |
|
1 |
History of TB exposure | |
2 |
Positive result to a TST or IGRA | |
3 |
Clinically active TB |
Positive culture (if done) for M. tuberculosis |
4 |
Previous TB disease (not clinically active) |
Medical history of TB disease |
5 |
Suspected TB |
Signs and symptoms of TB disease, but evaluation not complete |
CDC TB Classification for Immigrants and Refugees
Tuberculosis classification for immigrants and refugees according to the U.S. Citizenship and Immigration Services, developed by the Centers for Disease Control and Prevention (CDC):[2]
Class | Description |
---|---|
No TB Classification |
Applicants with normal tuberculosis screening examinations |
Class A TB with waiver |
All applicants who have tuberculosis disease and have been granted a waiver |
No treatment:
Completed treatment:
| |
Class B1 TB, Extrapulmonary |
Applicants with evidence of extrapulmonary tuberculosis |
Class B2 TB, LTBI Evaluation |
Applicants who have a tuberculin skin test ≥10 mm or positive IGRA but otherwise have a negative evaluation for tuberculosis |
Class B3 TB, Contact Evaluation |
Applicants who are a recent contact of a known tuberculosis case |