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Bacteriology/Mycology > Lab Diagnosis > Flashcards

Flashcards in Lab Diagnosis Deck (21)
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1
Q

All enterobacteriaceae are oxidase?

A
  • negative
2
Q

Endopigment

A
  • restricted to the colonies

- > golden yellow or white

3
Q

If blood agar hemolysis is dark/green what is it?

A
  • partial hemolysis

- > alpha

4
Q

Used to differentiate between Staphylococcus (+) and Streptococcus (-)

A
  • Catalase Test

- > bubbles

5
Q

If MacConkey growth was colorless it is a?

A
  • non-lactose fermenter
6
Q

If MacConkey growth was pink it is a?

A
  • lactose fermenter
7
Q

Exopigment

A
  • the color diffuses in the surroundijng medium

- > green

8
Q

The lowest concentration (highest dilution) of drug at which there is no bacterial growth

A
  • MIC determination
9
Q

Organisms which contain cytochrome c as part of their respiratory chain are oxidase ____ and turn the reagent _____

A
  • positive

- blue/purple

10
Q

If blood agar hemolysis is yellow what is it?

A
  • complete hemolysis

- > beta

11
Q

Selective medium that only gram negative grows in

A
  • MacConkey Agar
12
Q

Non-selective medium that all bacteria grow in

A
  • blood agar
13
Q

Bacterial specimen should be held at what degree celsius?

A
  • 4’C

- bacteria remain viable, but do not multiply

14
Q

Used to differentiate enterobacteriaceae from Pseudomonas (+)

A
  • oxidase test
15
Q

Delayed Hypersensitivity

A
  • used to test if the animal is already sensitive to a bacterium by injecting small amounts and measuring the site for inflammation
  • Used for glanders and Tuberculin
16
Q

test used to detect antibodies (Lyme disease)

A
  • ELISA test
17
Q

Make a hazy zone around the stab line

A
  • motile bacterium
18
Q

Mixing specific antiserum with culture to identify bacteria

A
  • bacterial agglutination
19
Q

Forms a single line of growth that does not spread into the surrounding area

A
  • non-motile organisms
20
Q

Antibiotic sensitivity testing

A
  • Disk Diffusion (Kirby-Bauer) method
21
Q

Used to differentiate staphylococcus from staphylococci (-)

A
  • coagulase test