Tuberculosis classification

Jump to navigation Jump to search

Tuberculosis Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Tuberculosis from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Children

HIV Coinfection

Diagnosis

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

Chest X Ray

CT

MRI

Echocardiography or Ultrasound

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Special Conditions
Drug-resistant

Surgery

Primary Prevention

Secondary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

Tuberculosis classification On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Tuberculosis classification

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Tuberculosis classification

CDC on Tuberculosis classification

Tuberculosis classification in the news

Blogs on Tuberculosis classification

Directions to Hospitals Treating Tuberculosis

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

Class Type of Tuberculosis Description

0

  • No TB exposure
  • Not infected
  • No history of TB exposure
  • Negative result to a TST or IGRA

1

  • History of TB exposure
  • Negative result to a TST (given at least 8-10 weeks after exposure) or IGRA

2

  • TB infection
  • No TB disease
  • Positive result to a TST or IGRA
  • Negative smears and cultures (if done)
  • No clinical or x-ray evidence of active TB disease

3

  • Clinically active TB
  • Positive culture (if done) for M. tuberculosis
  • Positive result to a TST or IGRA, and clinical, bacteriological, or x-ray evidence of TB disease

4

  • Previous TB disease (not clinically active)
  • Medical history of TB disease
  • Abnormal but stable x-ray findings
  • Positive result to a TST or IGRA
  • Negative smears and cultures (if done)
  • No clinical or x-ray evidence of active TB disease

5

  • Suspected TB
  • Signs and symptoms of TB disease, but evaluation not complete

CDC TB Classification for Immigrants and Refugees

The U.S. Citizenship and Immigration Services has an additional TB classification for immigrants and refugees developed by the Centers for Disease Control and Prevention (CDC). The 'B Notification Program' is an important screening strategy to identify new arrivals who have a high risk for TB.

United States Immigrant/Refugee TB Classification
Class Chest X-ray AFB smear Restrictions
A - TB, infectious Active TB Positive No entry to U.S. until treated and smears are negative
B1 - TB, clinically active, not infectious Active TB Negative Report to local health department for further medical evaluation within 30 days of arrival in U.S.
B2 - TB, not clinically active Inactive TB Not required unless symptomatic Same as above
No class (Normal) Normal Not required None


References

Template:WH Template:WS