Staphylococcus and micrococcus -

Question 1

Staphylococcus and micrococcus - Morphology

Answer 1

coccus 1um
in membranes, soil, water, food
no spore
no flagella 
no capsule

Question 2

Staphylococcus and micrococcus - staining and culture

Answer 2

Gram positive
Simple,
micrococcus has yellow pink orange colonies,
staphylococcus has white colonies
S. aureus ssp. anaerobius has no pigment
Selective culture on mannitol 10Nacl black collonies

Question 3

Staphylococcus and micrococcus - Fastidious or air tolerance

Answer 3

Non fastidious
Staphylococcus is facultative anaerobic apart from S. aureus ssp. anaerobius.
Micrococcus is obligate aerobic

Question 4

Staphylococcus and micrococcus - Catalase, oxidase and OF, haemolysis

Answer 4

Catalase +
Oxidase -
OF - F
alpha or beta haemolysis

Question 5

Staphylococcus and micrococcus - species

Answer 5

S. aureus ssp aureus, 
S aureus ssp. anaerobius,
S. pseudointermedius
S. hyicus
S. Gallinarium
S. felis
S. equorum

Question 6

Staphylococcus and micrococcus - Virulence factors

Answer 6

Coagulase
Protein A
Lipase 
esterase
elastase
hyaluronase 
staphylo kinase
leukocidin - destruction of phagocytes
alpha toxin - muscle spasm (gangreen)
beta toxin

Question 7

Staphylococcus and micrococcus - Micrococcus

Answer 7

Saprophyte 
obligate aerobic
Catalase +
Oxidase +
OF O/-