Staphylococcus

Question 1

characteristics of staph

Answer 1

part of normal host microbiota 
level 2 
- gram-positive
- aerobic or facultatively anaerobic 
- coagulase positive or negative 
- grape-like clusters

Question 2

virulence of staph

Answer 2

• toxic shock syndrome toxin
• enterotoxins
• exfoliatins
• leucoccidins
• MSCRAMM
• catalase
• hyaloronase

Question 3

S. aureus farm animals

Answer 3

host: cattle, sheep, goats, pigs, horses
disease: mastitis, the udder is a reservoir treatment: beware MRSA (methicillin-resistant s. aureus). resistant to polymyxins

Question 4

S. aureus avian

Answer 4

host: poultry
disease: bumblefoot - affects bones, tendon sheaths, joints, associated with green-liver osteomyelitis
low mortality/morbidity
opportunistic infection

Question 5

S. aureus small animal

Answer 5

host: dog, cat
disease; opportunistic + skin infections
acquired from people

Question 6

S. pseudintermedius

Answer 6

host: dog
disease: opportunistic + skin infections

Question 7

S. schleiferi

Answer 7

host: dogs
disease: opportunistic + skin infection

Question 8

S. hyicus

Answer 8

host: pigs
disease: exudative dermatitis (greasy pig dz)
acute to peracute in piglets
high mortality (70%)
treatment: early antimicrobials, resistant to polymyxins

Question 9

S. chromogenes

Answer 9

host: cattle, pig, goats
disease: mastitis