KROK 1 2017 – Question 74 · KROK (Medicine) · Microbiology, Virology, and Immunology
A bacteriological laboratory tests canned meat for botulinum toxin. Extract of the tested material and ABE botulinum antitoxin serum was introduced into the test group of mice; the control group of mice received the extract without antibotulinic serum. What serological reaction was used?
- A. Opsonophagocytic
- B. Complement binding
- C. Double immunodiffusion
- D. Neutralization
- E. Precipitation
Hint
Compare mice given extract plus antitoxin with the control mice, and decide which kind of antigen-antibody reaction is read from the survival of live animals rather than from a precipitate or lysis.
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
- A 10-year-old child had cut his leg with a glass shard, when playing, and was delivered to the outpatient department to receive antitetanus serum…
- Pathologic material (mucosal excretion from the nasal passages) obtained from a patient provisionally diagnosed with influenza was delivered to the…
- A 5-year-old child is diagnosed with Bruton syndrome (X-linked agammaglobulinemia) that manifests itself in severe clinical course of bacterial…
- Gram-positive spore-forming bacilli were extracted in anoxic environment from the patient’s wound contaminated with soil. Cultivation on a…
- A 22-year-old woman ate some seafood. 5 hours later her torso and distal parts of her limbs developed small itchy papules which were partially fused…
- Typical manifestations of food poisoning caused by C. botulinum are double vision, abnormal functioning of the swallowing and breathing. These…