KROK 1 2017 – Question 55 · KROK (Medicine) · Microbiology, Virology, and Immunology
During fibergastroscopy of a patient with ulcer disease of the stomach, the mucosal biopsy material is taken from the area of an ulcer. Impression smear is prepared from the biopsy material and stained by Gram method; the rest of the biopsy material is tested for urease activity. Microscopy of the impression smear revealed gram-negative spiral-shaped microorganisms, urease activity test is positive. What bacteria were detected?
- A. Helicobacter pylori
- B. Shigella flexneri
- C. Treponema pallidum
- D. Spirilla minor
- E. Campylobacter jejuni
Hint
Combine the Gram-stain shape with the urease result and ask how a bacterium could survive and settle in the acid environment of the stomach.
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
- Old burial ground for animal refuse, which has not been in use for the last 50 years, is planned to be given for housing development. However, the…
- A patient has been hospitalized with provisional diagnosis of virus B hepatitis. Serological reaction based on complementation of antigen with…
- A bacteriological laboratory tests canned meat for botulinum toxin. Extract of the tested material and ABE botulinum antitoxin serum was introduced…
- 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…