General microbiology

A. To define disease-producing factor
B. To define tinctorial properties C. To study antigenic properties
D. To define bacterial mobility E. To define antibiotic susceptibility
6. During inspectation of dental tools for sterility in one case gram-positive cocci were detected. They were situated in clusters and yielded positive plasma coagulation reaction; the cocci were fermenting mannitol in anaerobic conditions and exhibiting lecithinase activity. What microorganism as detected?
A. St. saprophiticus
B. St. epidermidis
C. Corynebacterium xerosis
D. Staph. aureus
E. Str. pyogenes
7. Microbiological purity of tableted drugs had been tested at factory. Samples cultivation in mannitol salt agar resulted in growth of golden-yellow colonies, microscopic examination of colonies detected grampositive globular bacteria positioned in clusters; microorganisms had plasma coagulation properties. What pure bacterial culture was obtained?
A. Staphylococcus aureus B. Enterobacteriaceae
C. Staphylococcus epidermidis D. Staph. saprophyticus
E. Pseudomonas aeruginosa
8. Examination of a patient with pustular skin lesions allowed to isolate a causative agent that forms in the blood agar roundish yellow middle-sized colonies surrounded by haemolysis zone. Smears from the colonies contain irregularshaped clusters of gram-positive cocci. The culture is oxidase- and catalasepositive, ferments mannitol and synthesizes plasmocoagulase. What causative agent was isolated?
A. Staphylococcus aureus B. Streptococcus agalactiae
C. Streptococcus pyogenes D. Staphylococcus epidermidis E. -
9. A 65-year-old man has purulent abscess on his neck. Analyses revealed a culture of gram-positive cocci with plasmocoagulase activity. This culture relates most likely to:
A. Staphylococcus aureus B. Streptococcus pyogenes
C. Staphylococcus epidermidis D. Staph. saprophyticus E. –
10. From the purulent exudate of a patient with odontogenic phlegmon a pure culture of Gram(+) microorganisms was segregated. This culture was lecithinously active, coagulated plasma of a rabbit, decomposed mannitol under anaerobe conditions. What microorganism may have contributed to the origin of suppurative complication?
A. S.aureus B. S.epidermidis C. S.pyogenes
D. S.viridans E. S.mutans
11. Purulent discharges of a patient with a mandibulofacial phlegmon contain spheroid microorganisms making S-shaped colonies with golden pigment that produce lecithinase, plasmocoagulase, hemolysin and decompose mannitol under anaerobic conditions. Specify the kind of microorganisms that had caused the suppuration:
A. S. aureus B. Str. pyogenes C. Str. mutans
D. S. epidermidis E. Str. sanguis
12. A 15-year-old patient consulted a dermatologist about a painful lump in the armpit. Objectively: there is a walnut-sized node, lymphadenitis, infiltration of the surrounding tissues. The patient has been diagnosed with hidradenitis. What is the most likely causative agent of this disease?