Pasteurella, Mannheimia, Bibersteinia trehalosi - Gutierrez

Question 2

Pasteurella spp colonize in the __________

Answer 2

URT or intestinal tract

commensal, opportunistic usually

Question 3

Which of the following is true about Pasteurella?
A. Motile
B. Infects a wide range of hosts
C. Hemolytic
D. Grows on MacConkey agar

Answer 3

B. Infects a wide range of hosts

Question 4

P.multocida has 3 recognized subspecies:

Answer 4

Multocida, Gallicida, Septica

Question 5

Pasteurella vs the environment?

Answer 5

Survives well in water and organic material for long periods

Question 6

How are humans infected with P.multocida?

Answer 6

Bite wound from cats and dogs

Question 7

P.multocida portal of entry is via the ___________

Answer 7

Respiratory tract

Question 8

What toxin of pasteurella can result in progressive atrophic rhinitis in pigs?

Answer 8

PMT - activates osteoclasts (dermonecrotic toxin)

Question 9

P.multocida in rabbits?

Answer 9

Snuffles - mucopurulent rhinosinusitis

Develops following stress

pleuropneumoniae, abscesses, otitis, conjunctiviits, genital infections

Question 10

P. multocida causes _________ in birds

Answer 10

Fowl cholera

Question 11

Which form of P.multocida in birds is fatal?

Answer 11

Peracute form

Question 12

What capsule serogroups are found in fowl cholera?

Answer 12

A, D, or F

Question 13

Where does fowl cholera persist?

Answer 13

URT, LRT, liver, lymphatics

Question 14

Clinical manifestations of P. multocida in bovines?

Answer 14

1. Pneumonia “shipping fever”
2. Hemorrhagic septicemia
3. Genital tract disease
4. Severe mastitis

Question 15

P. multocida is related to mass die-off events in _________

Answer 15

Ungulates and rodents

Question 16

P.multocida in stressed cattle results in ________ clinical manifestation

Answer 16

pneumonia “shipping fever”

Question 17

Shipping fever is more likely to occur in cattle that have been ___________

Answer 17

1. Weaned
2. Transported
3. Handled under stressful conditions

Question 18

Clinical signs associated with P. multocida in humans?

Answer 18

1. Cellulitis
2. Edema
3. Purulent exudate
4. Necrotizing fasciitis

Question 19

Culture of P. multocida should be done on _______

Answer 19

Blood agar

Question 20

How does P. multocida look on culture with blood agar?

Answer 20

• non-hemolytic colonies
• large mucoid colonies
• capsules of hyaluronic acid

Question 21

Pathogenesis of Bibersteinia trehalosi?

Answer 21

-Septicemia in weaned lambs

-Acute mortality

-Resp disease in cattle and sheep

Question 22

Post mortem lesions of B. trehalosi are indistinguishable from _________

Answer 22

M. haemolytica

Question 23

What culture media should be used for Mannheimia haemolytica?

Answer 23

MacConkey or Blood agar