KROK 1 2009 – Question 75 · KROK (Medicine) · Microbiology, Virology, and Immunology
A bacteriological laboratory has received smears from the sputum of a patient with a chronic pulmonary disease. Microscopical examination of the smears stained by the Ziehl-Neelsen technique revealed red bacilli. What property of the tuberculosis bacillus has shown itself?
- A. Spore formation
- B. Capsule formation
- C. Alcohol resistance
- D. Alkali resistance
- E. Acid resistance
Hint
Think about the waxy, lipid-rich wall of this bacillus and which kind of decolourising agent it prevents from removing the red dye.
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
- Retrospective diagnostics of bacterial dysentery involved serological analysis of blood serum intended for determination of Shigella antibody titre…
- A 10-year-old child had the mantoux tuberculin test administered. 48 hours later a papule up to 8 mm in diameter appeared on the site of the…
- A patient with clinical presentations of immunodeficiency has undergone immunological tests. They revealed significant decrease in number of cells…
- During the regular sanitary-epidemiological inspection of a pharmacy, the bacteriological analysis of air was performed. The air was found to have…
- Following exposure to radiation a lot of mutant cells appeared in a patient. Some time later most of them were detected and destroyed by the…
- A 65-year-old man has purulent abscess on his neck. Analyses revealed a culture of gram-positive cocci with plasmocoagulase activity. This culture…