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Flashcards in Gram [+] Material - Random Qs Deck (78)
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1

T/F: Staphylococcus is part of the normal flora of the skin in most animals.

True

2

T/F: Bovine chronic mastitis, caused by Staphylococcus aureus, is associated with young cows

False

(old cows)

3

Which of the following is NOT a characteristic of Staphylococcus?

  • Grow on non-enriched media
  • Stable in the environment
  • Cause pyogenic infections
  • Commensals on mm and skin
  • All of the above are characteristics of Staphylococcus

All of the above are characteristics of Staphylococcus

4

Which of the following is described as a Gram [+] pleomorphic non-spore forming human/animal pathogen?

  • Staphylococcus
  • Streptococcus
  • Listeria
  • Corynebacterium

Corynebacterium

5

What is the most common pyogenic organism in humans and several animal species?

Staphylococcus aureus

6

What is the leading pus-forming bacteria in dogs?

Staphylococcus pseudointermedius

7

Toxic Shock Syndrome toxin (TSST-1) is associated with which microorganism?

Staphylococcus

8

What are the hemolytic toxins associated with Staphylococcus?

alpha, beta, gamma, delta

9

complete hemolysis refers to ___-hemolysis

complete hemolysis refers to β-hemolysis

10

What type of hemolysis is present?

β-hemolysis

11

The typical lesion associated with Staphylococcus is the:

abscess!

inflammatory focus in which participating cells have been destroyed by the combined effect of bacterial and inflammatory cell activity

12

alpha toxin from Staphylococcus aureus produces ___-hemolysis

β-hemolysis

13

Name the bacteria responsible for Exudative Epidermitis (Greasy Pig Disease).

What is the key virulence factor involved?

Staphylococcus hyicus

Key virulence factor: Exfoliative toxin

14

Name the bacteria that causes bumblefoot in gallinaceous birds

Staphylococcus aureus

Bumblefoot is a chronic pyogranulomatous process in subcutaneous tissues of the foot resulting in thick-walled swellings on one or more joints

15

T/F: Streptococcus is catalase positive

False.

STAPHYLOcoccus is catalase positive. Streptococcus is catalase negative, fool

16

The most pathogenic strains of Streptococcus produce ___-hemolysis

The most pathogenic strains of Streptococcus produce β-hemolysis

17

The capsule of Streptococcus is composed of ___________

hyaluronic acid (HA)

HA is a constituent of mammalian connective tissue

18

M-protein, one of the major virulence factors in Streptococcus, is anti-phagocytic by binding __________ and ____________

M-protein, one of the major virulence factors in Streptococcus, is anti-phagocytic by binding fibrinogen and Factor H

19

Which Streptococcus species is responsible for genital & mastitic infections and STRANGLES in horses?

Streptococcus equi subsp. equi

Strangles is a highly contagious febrile rhinopharyngitis involving abscessation of regional lymph nodes

20

Widespread abscess formation with systemic manifestations associated with Strangles are referred to as:

Bastard Strangles

21

T/F: Staphylococcus agalactiae is an extremely important causative agent of mastitis

False

Streptococcus agalactiae is an extremely important causative agent of mastitis

Not Staphylococcus

22

What is the leading cause of pneumonia, septicemia, and meningitis in primates?

Streptococcus pneumoniae

23

You are presented with a five-year-old cocker spaniel with a history of persistent pyoderma. You collect samples from the edge of the lesion and upon microscopic examination observe Gram positive coccoid bacteria. As part of your differential diagnosis in this case you should have:

  • Streptococcus canis
  • Staphylococcus aureus
  • Staphylococcus pseudointermedius
  • All of the above
  • None of the above

All of the above

All of the agents can cause pyoderma, all can be found in a dog, and all are Gram-positive

24

You are presented with a five-year-old cocker spaniel with a history of persistent pyoderma. You collect samples from the edge of the lesion and upon microscopic examination observe Gram positive coccoid bacteria, and upon isolation and biochemical characterization the isolate is catalase positive. The most likely agent in this case is:

  • Staphylococcus hyicus
  • Staphylococcus aureus
  • Staphylococcus pseudointermedius
  • Streptococcus canis

Staphylococcus pseudointermedius

S. hyicus is mostly found in pigs

S. canis is catalase negative

25

T/F: Corynebacterium is acid fast

False.

Corynebacterium is non-acid fast

26

I say "chinese letters," you say:

Corynebacterium

or at least you ought to

27

Name the exotoxin present in Corynebacterium that increases vascular permeability, aids in the spread of the bacteria, inactivates complement, and inhibits chemotaxis:

Phospholipase D (PLD)

**remember dat shit

28

The virulence of Corynebacterium is primarily contributed to ___________ and ___________

The virulence of Corynebacterium is primarily contributed to phospholipase D (PLD) and cell wall lipids

29

Name the condition characterized by chronic abscessation of peripheral lymph nodes in sheep

Caseous lymphadenitis

30

Name the serodiagnostic test used for Corynebacterium

Synergistic hemolysis inhibition test

Has inhibitory effects of staphylococcal beta toxin and synergistic hemolysis with Rhodococcus equi