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Sem 3: BacT > Pasteurella, Mannheimia, Bibersteinia trehalosi - Gutierrez > Flashcards

Pasteurella, Mannheimia, Bibersteinia trehalosi - Gutierrez Flashcards

1
Q
A
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2
Q

Pasteurella spp colonize in the __________

A

URT or intestinal tract

commensal, opportunistic usually

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3
Q

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

A

B. Infects a wide range of hosts

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4
Q

P.multocida has 3 recognized subspecies:

A

Multocida, Gallicida, Septica

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5
Q

Pasteurella vs the environment?

A

Survives well in water and organic material for long periods

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6
Q

How are humans infected with P.multocida?

A

Bite wound from cats and dogs

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7
Q

P.multocida portal of entry is via the ___________

A

Respiratory tract

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8
Q

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

A

PMT - activates osteoclasts (dermonecrotic toxin)

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9
Q

P.multocida in rabbits?

A

Snuffles - mucopurulent rhinosinusitis

Develops following stress

pleuropneumoniae, abscesses, otitis, conjunctiviits, genital infections

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10
Q

P. multocida causes _________ in birds

A

Fowl cholera

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11
Q

Which form of P.multocida in birds is fatal?

A

Peracute form

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12
Q

What capsule serogroups are found in fowl cholera?

A

A, D, or F

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13
Q

Where does fowl cholera persist?

A

URT, LRT, liver, lymphatics

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14
Q

Clinical manifestations of P. multocida in bovines?

A
  1. Pneumonia “shipping fever”
  2. Hemorrhagic septicemia
  3. Genital tract disease
  4. Severe mastitis
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15
Q

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

A

Ungulates and rodents

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16
Q

P.multocida in stressed cattle results in ________ clinical manifestation

A

pneumonia “shipping fever”

17
Q

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

A
  1. Weaned
  2. Transported
  3. Handled under stressful conditions
18
Q

Clinical signs associated with P. multocida in humans?

A
  1. Cellulitis
  2. Edema
  3. Purulent exudate
  4. Necrotizing fasciitis
19
Q

Culture of P. multocida should be done on _______

A

Blood agar

20
Q

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

A
  • non-hemolytic colonies
  • large mucoid colonies
  • capsules of hyaluronic acid
21
Q

Pathogenesis of Bibersteinia trehalosi?

A

-Septicemia in weaned lambs

-Acute mortality

-Resp disease in cattle and sheep

22
Q

Post mortem lesions of B. trehalosi are indistinguishable from _________

A

M. haemolytica

23
Q

What culture media should be used for Mannheimia haemolytica?

A

MacConkey or Blood agar

Sem 3: BacT (16 decks)

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