KROK 1 2020 – Question 119 · KROK (Medicine) · Microbiology, Virology, and Immunology
A 5-year-old kindergartener has diphtheria. To find the carriers of this disease among the kindergarten staff, samples of pharyngeal mucus were obtained from the employees. One of the employees had gram-positive bacilli in her sample. They were situated at an angle to each other and colored unevenly, when stained according to Loeffler. What method can confirm that this carrier is dangerous to the other people?
- A. Immunofluorescence test
- B. Complement fixation test
- C. Serum agglutination test
- D. Toxin production test
- E. Mouse neutralization test
Hint
Think about what actually makes one strain of this bacillus harmful to others while a look-alike strain is harmless, and choose the method that proves that property.
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