mantoux test
Definition
Noun: - A diagnostic procedure for tuberculosis (TB) infection. A small amount of purified protein derivative (PPD) tuberculin is injected just under the skin (intradermally). The injection site is examined 48 to 72 hours later. A raised, hard bump (induration) of a certain size indicates a positive reaction, signifying that the person's immune system has been exposed to the bacteria that cause TB (Mycobacterium tuberculosis). A positive result requires further medical evaluation to determine if the infection is latent (inactive) or active TB disease.
Usage Examples
- Noun:
- All new healthcare workers are required to have a Mantoux test as part of their pre-employment screening.
- The doctor administered the Mantoux test on the patient's forearm.
- A positive Mantoux test does not necessarily mean a person has active tuberculosis; it shows exposure to the bacteria.
Advanced Usage
- "Mantoux test reading": The process of measuring and interpreting the reaction at the injection site after 48-72 hours.
- A nurse with specialized training performed the Mantoux test reading.
- "Mantoux test conversion": A change from a previously negative test result to a positive one, indicating a new TB infection.
- Annual screening detected a Mantoux test conversion in the employee.
Variants and Related Words
- Tuberculin skin test (TST) (n): The formal medical term for the Mantoux test.
- The tuberculin skin test is one method of screening for TB infection.
- PPD test (n): A common synonym, named after the Purified Protein Derivative used.
- She got a PPD test before starting her clinical rotation.
Synonyms
- Tuberculin skin test (TST): The standard technical synonym.
- PPD skin test: A widely used synonym focusing on the reagent.
Related Phrases
- Two-step testing: A procedure where an initial Mantoux test is followed by a second test 1-3 weeks later if the first is negative. This is used to establish a reliable baseline for people who may have had a remote infection whose reactivity has waned.
- For accurate baseline results, the facility uses two-step testing for all new residents.
Noun
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tuberculin (a derivative of tubercle bacillus) is injected intradermally; a red area appearing 1-3 days later signifies an exposure (past or present) to tubercle bacilli and the need for further testing
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