Widal test is used for the diagnosis of:
Correct answer: D. Typhoid.
- A. Malaria
- B. Pneumonia
- C. Tuberculosis
- D. Typhoid.
Explanation
Widal test (developed by G.F.I Widal) is an agglutination test for the presence of antibodies against the Salmonella organism that causes typhoid fever. It is used to diagnose the presence of the disease in a patient. If the patient has been exposed to Salmonella bacteria and has developed antibodies against them, a reaction called agglutination occurs. Agglutination causes the clumping together of the bacterial antigens and antibodies in the test solution, which is visible to the laboratory technician.
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Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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