Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Special microbiology.doc
Скачиваний:
0
Добавлен:
01.04.2025
Размер:
6.32 Mб
Скачать

407. What is the objective of studying cultural properties, capability to ferment starch and hemolytic activity of bacteria on identification the pure culture of Corynebacterium diphtheriae?

A. To reveal biovar of the causative agent.

B. To reveal serovar of the causative agent.

C. To reveal toxigenicity of bacteria.

D. For phagotyping.

E. To reveal bacteriocynes.

408. Because of the unfavorable epidemiological situation with morbidity rate of diphtheria, dt-vaccine was used for immunization of adults. What type of immunity does it produce?

A. Antitoxic.

B. Natural.

C. Cellular.

D. Passive.

E. Postinfectional.

409. A 5-year-old child presented to the hospital with a sore throat and fever. An initial diagnosis of diphtheria seems to be suggested. A causative agent of diphtheria is known to trigger toxin which destroys the process of translocation15. What is the mechanism of the process?

A. The agent modifies protein factor of translocation.

B. The agent inhibits translocase.

C. The agent leads to wrong translation.

D. The agent inhibits alongation16.

E. The agent destroys functioning of aminoacil-tRNA -synthetase.

410. A pure culture of Corynebacterium diphtheriae is isolated in the material obtained from the patient and stained by Neisser method. What inclusion is likely to be revealed in the causative agent?

A. Volutine (polymetaphosphate).

B. Starch.

C. Glycogen.

D. Sulfur.

E. Drops of neutral lipids.

411. A patient is initially diagnosed with diphtheria. A culture of bacteria is isolated from the coat of tonsils. Characterize morphological properties of the causative agent of bacteria.

A. Rod-shaped microorganism with a thickening at the end.

B. Microorganism of spherical shape.

C. Rod-shaped microorganism.

D. Curved microorganism.

E. Rod-shaped microorganism with sharp ends.

412. In the material obtained from the patient initially diagnosed with "diphtheria of fauces" there was isolated a culture with the following characteristics: Gram-positive rods

(3,0 × 0,6 µm) with thickening at the end arranged in a shape of stockade. What species of bacteria is it likely to be?

A. Corynebacterium pseudodiphtheriticum.

B. Corynebacterium diphtheriae.

C. Streptococcus pyogenes.

D. Actinomycetes.

E. Bordetella pertussis.

413. Microscopy of a nasopharyngeal swab obtained from a 5-year-old child revealed a microbe identical to nonproducing exotoxin Corynebacterium diphtheriae due to morphological and biochemical properties. What are the favorable conditions for microorganism to become toxigenic?

A. Chromosomal mutation.

B. Cultivation on medium with tellurite.

C. Passage through the organism of sensitive animals.

D. Growth in the presence of antitoxic serum.

E. Phage conversion.

414. For prophylaxis of infectious diseases according to the immunization schedule a child is to be vaccinated with DTP vaccine. Characterize the components that compose vaccine:

A. Inactivated pertussis vaccine, diphtheria and tetanus toxoids.

B. Attenuated (live) pertussis vaccine, diphtheria and tetanus toxoids.

C. Pertussis, diphtheria and tetanus toxoids.

D. Inactivated pertussis, diphtheria and tetanus vaccines.

E. Pertussis vaccine, diphtheria and tetanus antitoxic sera.

415. Several children from the boarding school contracted tonsillitis. Swabs obtained from the tonsils were stained by Neisser method; microscopy of the preparation revealed rods of yellow-brown pigmentation with dark blue thickening at the end. They seemed to be identical to the causative agent of diphtheria and were arranged in the form of the Latin letter "V". What additional investigation should be performed to make a final diagnosis of the disease?

A. To isolate pure culture and study its toxigenicity.

B. To perform Schick test17.

C. To perform serological investigation of the blood serum for the presence of antibodies.

D. To isolate pure culture of diphtheria and identify its biovar.

E. To use other methods of staining.

416. A 5-year-old child presented to the hospital in a state of asphyxia. Examining the patient, pediatrician revealed yellow-grayish coat obstructing the lumen of the pharynx. What disease are such clinical features typical for?

A. Diphtheria.

B. Scarlet fever.

C. Whooping cough.

D. Measles.

E. Meningococcal infection.

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]