Lesson 2a

Question 1

At least 5 descriptions of staphylococcus

Answer 1

-Gram positive cocci
-Grow on non enrichededia
-Non-motile and non spore forming
-Commensal on skin and mucous membrane
-Causing pyogenic infection

Question 2

Staphylococcus:
sample source
Demonstration of bacteria
Identification criteria

Answer 2

-lesion (skin scraping, swab sample), exudate, mastitic milk sample
-gram staining, culture on blood agar, selective blood agar, macConkey agar

• colonial chracteristics, presence or absence of haemolysis, absence of growth on macConkey agar, catalase production, coagulase production, biochemical profile

Question 3

Staphylococcal diseases of importance in domestic animals

Answer 3

mastitis
tick pyaemia
exudative epidermitis
botryomycosis
Pyoderma

Question 4

most often causes subclinical
infections; virulence factor is alpha toxin that results to tissue necrosis and can
be life threatening

Answer 4

Bovine staphylococcal mastitis

Question 5

a chronic, suppurative granulomatous
condition, which usually occur within a few weeks of castration in the horse due
to infection of the stump of the spermatic cord

Answer 5

Botryomycosis