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Flashcards in ID Deck (20):
0

What colour are gram-positive bacteria?

Purple

1

What colour are gram-negative bacteria?

Pink

2

Why would mycoplasma not take up a gram stain?

Lacks cell walls

3

Gram positive bacteria:
(Purple)

Trueperella pyogenes
Bacillus cereus
Clostridium perfringens
Clostridium septicum
Corynebacterium species
Mycobacterium microtii
Streptococcus equii

4

Gram-negative bacteria:

Acinetobacter baumannii (can acquire multi-drug resistance)
Campylobacter jejuni (gastroenteritis)
Eschericia coli
Fusobacterium species (abscesses)

5

Yeast and fungi:

Candida albicans (yeas tgram positive)
Malassezia pachydermitis (yeast, gram positive)
Trichophyton equinum

6

Streptococci appearance:

String/chain of oval-shapes

7

Staphylococci appearance:

Bunch of grapes

8

What test allows you to identify between streptococci and staphylococci?
What is the result?

Catalase test
Production of oxygen bubbles indicates presence of catalase
If positive -> Staphylococcus

9

Tetracocci appearance?

Groups of 4 oval shapes

10

What are the 4 rod types?

Curved rods
Comma shaped
Diplobacilli (paired)
Streptobacilli (rods in chains)

11

What shaped rod is campylobacter?

Comma shaped

12

What colour do yeast appear on a gram stain?

Purple (gram positive)

13

What is the result of an oxidase test?

Colour change from colourless to blue

14

What is mycology?

Study of fungi

15

Describe 3 types of lab diagnostics with which an infection with a micro-organism can be confirmed

Antigen detection
Direct microscopic observation
Detection of nucleic acids via PCR
Isolation and characterisation of micro-organisms

16

What does MAT stand for?
How does it work?

Microscopic agglutination test

The sera from potentially infected animals are subjected to different leptospires
An animal is considered infected for a specific Leptospira when the host sera agglutinates in the presence of the leptospires
Agglutination is the clumping of cells or particles. The antibody binds multiple particles, creating a large complex

17

Describe 3 considerations when collecting a clinical sample

A sufficient amount of material should be collected
Specimens should be stored appropriately
Specimens must be obtained aseptically

18

What is the difference between bacteriocidal and bacteriostatic antibiotics?
Give an example of each

Bacteriostatic antibiotics inhibit growth of bacteria but don't necessarily kill them. Eg tetracyclines
Bacteriocidal antibiotics result in the death of bacteria. Eg beta-lactams.

19

What name is given to the study of viruses?

Virology