Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

So Many Numbers: How to Interpret QFT Results

Slide Set
So Many Numbers: How to Interpret QFT Results

This slide set by the Indiana Department of Health provides information on the process of collecting and interpreting TB blood test samples. 

Author:

Indiana State Department of Health

Audiences:

Lab Personnel

Topic:

Diagnosis, Diagnosis- Laboratory Procedures

Country of Origin:

United States

Download PDF

Related Materials

Online TST/QFT Interpreter

This tool estimates the risk of active tuberculosis for an individual with a tuberculin skin test reaction of 5+mm, based on his/her clinical profile. It is intended for adults tested with standard tuberculin (5 TU PPDS, or 2 TU RT-23).

Tool

Targeted Tuberculin Testing and Interpreting Tuberculin Skin Results

This information sheet discusses targeted tuberculin testing focusing on the groups at highest risk for latent TB infection (LTBI). It advises that testing should be given to those at highest risk for developing TB, and once TB disease has been ruled out, then it should be offered to those who would benefit from LTBI treatment. It also explains the steps that should be taken to ensure completion of the regimen. The information sheet groups persons at risk for developing TB disease into two categories: those who have been recently infected, and those with clinical conditions that increase the risk of progression from LTBI to TB disease. It also lists criteria for classifying positive TST reactions and clarifies questions about the interpretation of TST results in persons who had received bacille Calmette-Guerin (BCG) vaccine, persons with HIV infection, and recent contacts of a person with active TB.

Information Sheet

Targeted Tuberculin Testing and Interpreting Tuberculin Skin Test Results

This fact sheet provides information on targeted tuberculin testing. It explains how to interpret tuberculin skin test (TST) results, including special considerations.

Fact Sheet

Global resources for the prevention,
management, and elimination of TB.