A. Binding to IgE fixed to mast cells B. Inhibited synthesis of mast cells mediators
C. Stimulation of the immunological antigen tolerance
D. Stimulation of antigen-specific IgG2 synthesis
E. Binding of IgE receptors on mast cells.
23. A 10-year-old child cut his leg with a glass shard, when playing, and was delivered to outpatient department to receive anti-tetanus serum. To prevent development of anaphylactic shock the serum was introduced by Bezredka method. This method of organism hyposensitization is based on the following mechanism:
A. Stimulation of antigen-specific IgG2
B. Stimulation of the immunological antigen tolerance
C. Stabilization of mast cell membranes
D. Blocking of mast cell mediators synthesis
E. Binding of mast cell-fixed IgE 24. Typical manifestations of food poisoning caused by C. botulinum are double vision, abnormal functioning of the swallowing and breathing. These symptoms develop as a result of:
A. Exotoxin effects B. Enterotoxin effects
C. Enterotoxic shock development D. Activation of adenylate cyclase
E. Pathogen adhesion to the enterocyte receptors
25. Typical signs of food poisoning caused by C. botulinum include diplopia, swallowing and respiration disorders. These signs develop due to:
A. Enterotoxic shock development
B. Enterotoxin action
C. Adenylate cyclase activation
D. Adhesion of the agent to enterocyte receptors
E. Exotoxin action 26. After consumption some tinned meat a patient had diplopia, acute headache, deglutition disorder, hard breathing, muscle weakness. The diagnosis was botulism. What factor of pathogenicity are the clinic presentations of this disease connected with?
A. Exotoxin B.Hemolysin C.Endotoxin
D.Plasmocoagulase E.Fibrinolysin
27. When examining a patient with a suspicion of food toxicoinfection, a doctor on duty has detected symptoms characteristic of botulism. The patient named the meals he had eaten the day before. What is the most probable cause of infection?
