A patient suffering from diarrhea was admitted to the

infectious disease unit. Gram-negative, rod-like

A 4-month-old baby with the symptoms of acute bowel

infection was admitted to the hospital. Bacteriological examination of the

faeces revealed large amounts of red colonies on the Endo agar. What

microorganism is most likely present?

A duodenal content smear of a patient with indigestion revealed

protozoa 10-18 mcm in size.

While examining a patient, an otolaryngologist observed

hyperemia and notably swollen tonsils covered with a grayish film.

Microscopic analysis of the film revealed the presence of gram-positive bacilli

arranged at an angle to each other. Which disease might be suspected?  

A patient visited the infectious disease specialist

complaining of a 3-day fever, general weakness, and appetite loss. The doctor

suspected typhoid fever. Which laboratory diagnostic method can confirm the

diagnosis?

A

virological laboratory received a mucous discharge from the nasal passages of a

patient with a provisional diagnosis of 'influenza'. Which rapid test would

reveal specific viral antigens in the examined material?

A physician examines a microslide of a

regional lymph node punctate, stained using the Romanowsky technique. Under the

microscope, slender, light-pink microorganisms are observed. They have 12–14 even/regular/uniform spiral coils with pointed ends up to 10–13 micrometers in length. They might be the causative agent of

the following disease:

Examination

of a patient with pustular skin lesions led to the isolation of a causative

agent that forms round, yellow, medium-sized colonies on blood agar, surrounded

by a hemolysis zone. Smears from the colonies contain irregular clusters of

Gram-positive cocci. The culture is oxidase- and catalase-positive, ferments

mannitol, and synthesizes plasmocoagulase. Which causative agent was isolated?

Widal's agglutination test was repeated. It was observed

that the antibody titer against S.typhi O-antigens in the patient's serum

increased from 1:100 to 1:400. How would you interpret these results?  

Which sputum staining technique should be chosen to detect Koch's

bacillus in a patient with an “open” case of tuberculosis (active TB)?