Pasteurella

Question 1

Charcteristics of Pasteurella

Answer 1

Gram Negative Bacilli
Non-motile
Facultative Anaerobes
Fermentative
Grows on blood and chocolate
NO GROWTH on MacConkey (unique as it usually selects for gram neg rod)
Oxidase Positive
Catalase Positive
Penicillin Susceptible

Question 2

Where is Pasteurella normally found?

Answer 2

Normal resp and GI flora of cats and dogs

Question 3

How does pasteurella infeciton occur?

Answer 3

Cat and Dog bits and scratches

Inhalation

Question 4

What are the species of pasteurella?

Answer 4

P.Multocida(cat)

P.Canis (dog)

Question 5

What happens in human infections of pasteurella via animal bite?

Answer 5

Wound infections/cellulitis following cat bite
Pain, swelling, serosanguinous drainage at wound site
Septic Arthritis and Osteomyelitis for deep puncture wounds

Compromised patients may get serious infections requiring debridement

Question 6

How is Pasteurella diagnosed

Answer 6

Culture the lesion site and collect blood for culture

Question 7

What drug is used to treat pasteurella?

Answer 7

Penicillin(unusual for gram neg organism)

Question 8

Is Pasteurella catalase neg or pos?

Answer 8

Positive

Question 9

Is Pasteurella oxidase neg or pos?

Answer 9

Positive

Question 10

What kind of agar does pasteurella grow on?

Answer 10

Blood
Chocolate
does NOT grow on MacConkey