KROK 1 2010 – Question 67 · KROK (Medicine) · Microbiology, Virology, and Immunology
During the repeated Widal’s agglutination test it was noticed that the ratio of antibody titers and O-antigens S. typhi in the patient’s serum had increased from 1:100 to 1:400. How would you interpret these results?
- A. The patient previously had typhoid fever
- B. The patient was previously vaccinated against typhoid fever
- C. The patient has typhoid fever
- D. The patient is a chronic carrier of typhoid microbes
- E. The patient is an acute carrier of typhoid microbes
Hint
Consider what a rising antibody titre between two serum samples taken days apart indicates about the time course of the infection, compared with a stable titre.
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