Test 1: Staphylococcus (Gram +)

Question 1

T/F

Staphylococcus is part of normal flora

Answer 1

TRUE

Question 2

Pathogenic strains of Staphylococcus produce what enzyme?

Answer 2

COAGULASE

Question 3

Are there pathogenic strains of

Staphylococcus

that do not produce coagulase?

Answer 3

YES

Question 4

What is the most common pyogenic organism in humans

and most animal species?

Answer 4

Staphylococcus aureus

Question 5

What is the leading

pus-forming bacteria

in

DOGS?

Answer 5

Staphylococcus pseudointermedius

Question 6

What strain of Staphylococcus

causes

• exudative epidermidis of swine
• bovine mastitis
• otitis externa in dogs?

Answer 6

Staphylococcus hyicus

Question 7

Which two species of Staphylococcus

can cause

otitis externa

in dogs?

Answer 7

Staphylococcus hyicus

and

Staphylococcus schleiferi subs. coagulans

Question 8

What is the virulence factor adhesin associated with

Staphylococcus?

Answer 8

MSCRAMMS

Question 9

The capsule of Staphylococcus

acts in preventing

Answer 9

phagocytosis

Question 10

*Staphylococcus *protein and polysaccharide virulence factors include what 2 substances?

Answer 10

Teichoic acid

and

Clumping factor

^{(used in COAGULASE test)}

Question 11

Protein A aggregates with ____ fragments of immunoglobulin

Answer 11

Fc

Question 12

What are 2 superantigens produced by

Staphylococcus?

Answer 12

Staphylococcal enterotoxin (SE)

and

Toxic shock syndrome toxin (TSST-1)

Question 13

Which superantigen produced by Staphylococcus

crosses mucus membranes?

Answer 13

TSST-1

Question 14

Which superantigen produced by

Staphylococcus

is a neurotoxin?

Answer 14

Staphylococcal enterotoxins (SE)

Question 15

*Staphylococcus *Exfoliative toxins target ________

Answer 15

Desmoglein

(intercellular adhesion protein)

Question 16

*Staphylococcus *exfoliative toxins (serine proteases)

cause scaled skin syndrome in infants

and may be involved in

what disease affecting pigs?

Answer 16

PORCINE EXUDATIVE EPIDERMITIS

Question 17

*Staphylococcus *has 4 hemolytic toxins

Alpha

Beta

Gamma

Delta

Which one does complete hemolysis and which one does partial hemolysis at 37C

Answer 17

Alpha- complete hemolysis

Beta- partial hemolysis

at

37C

Question 18

The typical lesion of

Staphylococcus

is

Answer 18

the ABCESS!

Question 19

What is

Botyromycosis?

Answer 19

Thickened tissue with multiple small abcesses

containing

actinomycosis-like granules

Question 20

Can Staphylococcus

be Zoonotic?

Answer 20

YES!!!

Transmission can occur between animals and humans!!

Question 21

Canine pyoderma is caused by

Answer 21

S. pseudointermedius

Question 22

One of the leading causes of bovine mastitis is caused by

alpha toxin of what strain of Staphylococcus?

Answer 22

S. aureus

Question 23

What is tick pyemia of lambs?

Answer 23

Infection of indigenous skin *S. aureus *

after being bitten by a tick (ixodes ricinus)

Question 24

This disease in pigs is

often systemic and fatal

and is caused by

Staphylococcus hyicus

Answer 24

*Exudative epidermitis *

^{(exfoliative toxin is virulence factor)}

Question 25

S. aureus can cause pectoral abcesses in equines

but ___________ ___________

is a far more common cause

Answer 25

Corynebacterium pseudotuberculosis

Question 26

What causes “bumblefoot” in gallinaceous birds?

Answer 26

S. aureus

Question 27

Will a catalase test be positive or negative when inoculated with

Staphylococcus?

Answer 27

Positive

catalase test

Question 28

What is bacterial interference?

Answer 28

A controversial approach to solving the resistance problem with

Staphylococcus spp.