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AA Microbio Semifinal > Study aid part 2 (43 - 70) > Flashcards

Study aid part 2 (43 - 70) Flashcards

1
Q
  1. Which bacteria can be differentiated with the catalase test?
A

a. Staphylococci (+) and Streptococci (-)

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2
Q
  1. Which bacteria can be differentiated with the coagulase test?
A

a. Staphylococcus aureus (+) and the other staphylococcus species (-, so called „coagulase- negative staphylococci”)

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3
Q
  1. Microscopic morphology of Staphylococci
A

a. Gram-positive cocci, arranged in grape-like structures

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4
Q
  1. Colony morphology of Staphylococcus aureus on blood agar plate
A

a. average size, round colonies with butter consistency, golden pigment production and beta-haemolysis

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5
Q
  1. What are the non-toxic virulence factors of Staphylococcus aureus? (3 example)
A

a. Protein A, endocoagulase (clumping factor), exocoagulase, adhezins, teicoic acid, hialuronidase, protease, lipase, DN-ase.

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6
Q
  1. What are the toxic virulence factors of Staphylococcus aureus?
A

a. Leucocidin, toxic shock syndrome toxin, exfoliative toxin, enterotoxin, haemolysin

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7
Q
  1. Disease (non toxin mediated) caused by Staphylococcus aureus?
A

a. Folliculitis, furuncle, carbuncle, impetigo, pneumonia, osteomyelitis, food poisoning.

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8
Q
  1. Diseases caused by Staphylococcus aureus exotoxins? (2 example)
A

a. Food poisoning, scalded skin syndrome, toxic shock syndrome

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9
Q
  1. List at least 2 coagulase-negative staphylococcus species (from the list provided below)!
A

a. S. epidermidis, S. saprophyticus, S. haemolyticus, S. lugdunensis

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10
Q
  1. Diseases caused by coagulase negative staphylococci?
A

a. Nosocomial infections, biofilm production on the surface of plastic devices.

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11
Q
  1. Which bacterium can cause „Honeymoon cystitis”?
A

a. Staphylococcus saprophyticus

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12
Q
  1. Colony morphology of Streptococcus pyogenes on blood agar plate
A

a. small, pin-point colonies, surrounded by large, strong beta-haemolytic zone

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13
Q
  1. Which streptococci show beta-haemolysis?
A

a. Streptococcus pyogenes, Streptococcus agalactiae

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14
Q
  1. Which streptococci show alpha-haemolysis?
A

a. Streptococcus pneumoniae and viridans streptococci (e.g. S. mutans, S. mitis, S. salivarius)

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15
Q
  1. Which species is the Lancefield group A streptococcus?
A

a. Streptococcus pyogenes

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16
Q
  1. Which species is the Lancefield group B streptococcus?
A

a. Streptococcus agalactiae

17
Q
  1. What is the causative agent of scarlet fever?
A

a. Streptococcus pyogenes?

18
Q
  1. Which bacterial virulence factor is the causative agent of scarlet fever?
A

a. Streptococcus pyrogenic exotoxin or erythrogenic toxin

19
Q
  1. What is the capsule of S. pyogenes made of?
A

a. hyaluronic acid

20
Q
  1. Diseases (non toxin mediated) cause by Streptococcus pyogenes? (3 examples)
A

a. Pharyngitis, tonsillitis, sinusitis, impetigo, erysipelas, necrotising fasciitis, scarlet fever, TSST

21
Q
  1. What kind of post streptococcal infections can be caused by Streptococcus pyogenes?
A

a. Acute rheumatic fever, glomerulonephritis

22
Q
  1. Which two streptococcus species show 100% penicillin sensitivity still now?
A

a. Streptococcus pyogenes and Streptococcus agalactiae

23
Q
  1. What kind of disease can be caused in new-borns by Streptococcus agalactiae?
A

a. In new born meningitis, sepsis, pneumonia.

24
Q
  1. Which bacterium is the leading cause of neonatal meningitis?
A

a. Streptococcus agalactiae

25
Q
  1. Microscopic morphology of Streptococcus pneumoniae
A

a. Gram-positive diplococci

26
Q
  1. How can be prevented the invasive diseases caused by Streptococcus pneumoniae?
A

a. By 23 valent polysaccharide capsule vaccine or by 13 valent conjugated vaccine.

27
Q
  1. Which two bacteria can be differentiated based on their optochin sensitivity / resistance?
A

a. S. pneumoniae (S) and viridans streptococci (R)

28
Q
  1. What kind of disease can be cause by viridans group streptococci?
A

a. Dental decay or endocarditis.

AA Microbio Semifinal (99 decks)

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