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Microbio > Bacteria Labs > Flashcards

Bacteria Labs Flashcards

1
Q

What tests positive for catalase test?

A

Micrococcaceae

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2
Q

What tests negative for catalase test?

A
  • streptococcus

- enterococcus

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3
Q

What do you test streptococcus and enterococcus for further differentiation?

A

Hemolysis

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4
Q

Is S.pyogenes suscept/resistant to bacitracin susceptibility test?

A

Susceptible

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5
Q

What type of hemolysis does S. Pyogenes undergo?

A

Beta-hemolysis

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6
Q

Is S. pneumonia resistant/susceptible to optochin-susceptibility?

A

Susceptible

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7
Q

What type of hemolysis does S. pneumonia undergo?

A

Alpha-hemolysis

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8
Q

What tests positive in catalase test?

A

Micrococcacea

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9
Q

What do you test micrococcacea to differentiate ?

A
  • dextrose fermentation

- nitrofurantoin-susceptibility

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10
Q

What tests positive for dextrose fermentation and nitrofurantoin-susceptibility?

A

Staphylococcus

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11
Q

What tests negative for dextrose fermentation and niteofurantoin susceptibility?

A

Micrococcus

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12
Q

What tests positive in a coagulase test?

A

Staph. Aurius

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13
Q

What tests negative in a coagulase test?

A

CNS (coagulase negative staph.)

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14
Q

What is resistant to novibiocin susceptibility test?

A

Staph. Saprophyticus

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15
Q

What is susceptible to novibiocin-susceptibility?

A
  • staph. Epidermis

- staph. Hemolyticus

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16
Q

What is positive in urease activity test?

A

Staph. Epidermis

17
Q

What is negative in urease test?

A

Staph. hemolyticus

18
Q

What is strep. pyogenes susceptible to?

A

Bacitracin

19
Q

What is strepto. pneumonia susceptible to?

A

Optochin

20
Q

What types of colonies are formed by streptococcus pyogenes?

A
  • matte
  • mucoid
  • smooth (glossy)
21
Q

What is M protein and what produced it?

A

It is a virulence factor.

Produced by some streptococcus species

22
Q

Which colonies of streptococcus pyogenes has virulent strains?

A
  • mucoid
  • matte
    (Due to presence of M-protein)
23
Q

Which colony of strepto. pyogenes is avirulent?

A

-smooth (glossy)

B/c no M protein present

24
Q

What is the pathogeny of streptococcus pyogenes?

A

Obligate pathogen

Must cause disease in order to be transmitted from one host to another

Microbio (14 decks)

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