KROK 1 Stomatology 2014 – Question 186 · KROK (Dentistry)

A 32-year-old patient undergoing dental examination was found to have some rash-like lesions resembling secondary syphilis in the oral cavity. The patient was referred for the serological study with the purpose of diagnosis confirmation. In order to detect antibodies in the serum, living Treponema were used as diagnosticum. What serological test was performed?

  1. A. Neutralization
  2. B. Passive hemagglutination
  3. C. Precipitation
  4. D. Immobilization
  5. E. Complement binding
Hint

Ask why the test needs living treponemes at all: what effect of specific antibodies can only be seen on live organisms under dark-field microscopy?

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