KROK 1 2007 – Question 101 · KROK (Medicine) · Microbiology, Virology, and Immunology
Bacteriological laboratory examines canned meat whether it contains botulinum toxin. For this purpose an extract of test specimen and antitoxic antibotulinic serum of A, B, E types were introduced to a group of mice under examination; a control group of mice got the extract without antibotulinic serum. What serological reaction was applied?
- A. Double immune diffusion
- B. Opsono-phagocytic
- C. Precipitation
- D. Neutralization
- E. Complement binding
Hint
Consider how a specific antiserum can mask the harmful effect of a toxin in living animals, so that protected mice survive while the controls die.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Microbiology, Virology, and Immunology
- For the purpose of retrospective diagnostics of recent bacterial dysentery it was decided to perform serological examination of blood serum in order…
- 48 hours after performing tuberculin test (Mantoux test) to a child a 10 mm papule appeared on the spot of tuberculin introduction. What…
- A patient with clinical presentations of immunodeficiency went through immunological examinations. They revealed significant loss of cells that form…
- Urine examination of a patient with acute cystitis revealed leukocytes and a lot of gram-negative bacilli. Inoculation resulted in growth of…
- A laboratory received a material from a patient’s wound. Preliminary diagnosis is gaseous gangrene. What microbiological method should be applied to…
- A boy is 7 y.o. Objectively: against the background of hyperemic skin there is knobby bright-pink rash on his forehead, neck, at the bottom of…