KROK 1 2015 – Question 31 · KROK (Medicine) · Microbiology, Virology, and Immunology
Serological diagnostics of infectious diseases is based upon specific interaction with antigens. Specify the serological reaction that underlies adhesion of microorganisms when they are affected by specific antibodies in presence of an electrolyte:
- A. Agglutination reaction
- B. Hemadsorption reaction
- C. Neutralization reaction
- D. Complement-binding reaction
- E. Precipitation reaction
Hint
Consider the physical form of the antigen here (whole cells rather than dissolved molecules) and what bivalent antibodies visibly do to such particles in a salt-containing medium.
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 patient has been hospitalised with provisional diagnosis of virus B hepatitis. Serological reaction based on complementation of antigen with…
- In a village a case of anthrax has been registered. Medical services began epidemiologically indicated specific prophylaxis of population against…
- Parents of a 5-year-old boy report him to have frequent colds that develop into pneumonias, presence of purulent rashes on the skin. Laboratory…
- A 4-year-old child presents with general weakness, sore throat and deglutitive problem. After his examination a doctor suspected diphtheria and sent…
- Microscopy of a female patient’s swabs made from vaginal secretion revealed gram-negative bean-shaped diplococci. What provisional diagnosis can be…
- A patient has been diagnosed with URTI. Blood serum contains immunoglobulin M. What stage of infection is it?