Tine test
Tine Test
The Tine Test (pronounced: /taɪn tɛst/) is a diagnostic tool used in the field of medicine to detect the presence of tuberculosis in a patient. The term "Tine" is derived from the Latin word "tinea", which means "a worm". This is in reference to the worm-like appearance of the tuberculin protein used in the test.
Procedure
The Tine Test involves the application of a small amount of purified protein derivative (PPD) tuberculin to the skin using a device with multiple short prongs or "tines". The device is pressed into the skin, usually on the forearm, to create a series of small punctures. The patient's immune response to the tuberculin is then observed over a period of 48 to 72 hours.
Interpretation
The results of the Tine Test are interpreted by measuring the size of the induration (swelling) at the site of the test. A larger induration typically indicates a positive reaction, suggesting that the patient has been exposed to Mycobacterium tuberculosis, the bacterium that causes tuberculosis.
Limitations
While the Tine Test is a useful screening tool, it is not definitive. A positive result does not necessarily mean the patient has active tuberculosis, as it can also indicate past exposure or vaccination. Similarly, a negative result does not rule out the possibility of tuberculosis, especially in individuals with weakened immune systems.
Related Terms
- Mantoux test: Another skin test used to detect tuberculosis.
- Tuberculin: The protein used in the Tine Test.
- Mycobacterium tuberculosis: The bacterium that causes tuberculosis.
External links
- Medical encyclopedia article on Tine test
- Wikipedia's article - Tine test
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