Schick test
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The Schick test, invented between 1910 and 1911, is a test used to determine whether or not a person is susceptible to diphtheria. It was named after its inventor, Béla Schick (1877-1967), a Hungarian-born American pediatrician. The test is a simple procedure. A small amount (0.1 ml) of diluted (1/50 MLD) diphtheria toxin is injected intradermally into the arm of the person. If a person does not have enough antibodies to fight it off, the skin around the injection will become red and swollen (positive result). This swelling disappears after a few days. If the person has immunity, then little or no swelling and redness will occur (negative result).
References
- Taber's Cyclopedic Medical Dictionary - 20th Ed. (2005)
results can be interpreted as: 1.positive: when the test results in a wheel of 5-10 mm diameter. 2.pseudo positive:when there is only a red colored inflammation and it disappears rapidly 3.negative reaction: 4.pseudo negative reaction
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