Name............................................................................................................ Group C 29.10.2008.

1. The process of completely removing or destroying all life forms and their products on or in a substance is called:

a) disinfection

b) antisepsis

c) sterilization

d) scrubbing

2. UV radiation is used for:

a) sterilization of medical devices

b) disinfection of liquids

c) surface disinfections

d) drugs disinfection

3. Mechanism of resistance to methycyllin occurs among of:

a) coagulase negative Staphylococcus

b) only Staphylococcus aureus

c) all Staphylococci

d) Streptococcus spp.

4. A 55-year-old male was admitted to a local hospital with fever and chills. The patient had received multiple courses of antibiotics. Blood cultures grew a Gram positive cocci, which tested positive with group D streptococcal antisera. The isolate was resistant to penicillin and vancomycin. Which of the following is the most likely pathogen?

a) Streptococcus pneumoniae

b) Enterococcus faecium

c) Streptococcus pyogenes

d) Streptococcus agalactiae

5. Biofilms adhere to artificial body parts and catheters produce:

a) Staphylococcus epidermidis

b) Streptococcus pneumoniae

c) Streptococcus viridans

d) Streptococcus pyogenes

6. A 3-year-old child develops acute glomerulonephritis following impetigo. The bacteria is a Gram-positive coccus that has M surface protein. What is the most likely causative agent?

a) Enterococcus faecium

b) Staphylococcus aureus

c) Streptococcus pneumoniae

d) Streptococcus pyogenes

7. High ASO titers point to:

a) S.aureus induced infection experienced in the past

b) S.pyogenes

c) S.pneumoniae

d) S.saprophyticus

8. Meningococcal vaccins:

a) are prepared from the cell wall of N. menigitidis

b) are serogroup - specific, capsular polysaccharides

c) are particilarly effective in the prevention of disease due to serogroup B

d) rarely prevent dissemination of organisms from the primary site

9. What are the post-streptococcal diseases (complications)?

a) acute rheumatic fever and acute glomerulonephritis

b) erysipelas and scarlet fever

c) scarlatina and impetigo

d) pharyngitis and tonsilitis

10. N. meningitidis causes meningitis in all age groups. Which of the following is a characteristic physiological trait?

a) It causes spontaneous abortion and has tropism for placental tissue due to the presence of the erythritol in allantoic and amniotic fluid.

b) It has a capsule of polyglutamic acid, which is toxic when injected into rabbits.

c) It possesses N-acetylneuraminic acid capsule and adheres to specific tissue by pili found on the bacterial cell surface.

d) It secretes two toxins, A and B, in the large bowel during antibiotic therapy.

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