Discussion
Schick Test is used for detection of which of the following disease?
Answer: A
Correct answer: Diphtheria
The Schick test detects susceptibility to diphtheria. A small dose of diphtheria toxin is injected intradermally: in a person without circulating antitoxin the toxin produces local redness and induration - a positive test, meaning susceptible - while in an immune person the antitoxin neutralises it and no reaction appears. A control of heated toxin in the other arm distinguishes a true reaction from hypersensitivity to the protein.
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