59. Genera Mannheimia and Bibersteinia Flashcards Preview

Bacto specific oral > 59. Genera Mannheimia and Bibersteinia > Flashcards

Flashcards in 59. Genera Mannheimia and Bibersteinia Deck (8)
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1
Q

Habitat?

A

MANNHEIMIA, BIBERSTEINIA

Habitat: • mucous membranes (resp.)

2
Q

Morphology?

A

Morphology • 0.5-2 µm coccoid rods

3
Q

Staining?

A

Staining: • Gram-negative • bipolar staining

4
Q

Culture?

A

Culture:

  • fastidious
  • blood agar, yeast extract, pH-susceptibility
  • β hemolysis
5
Q

Biochemistry?

A

Biochemistry:

  • catalase +,
  • oxidase +,
  • fermentative
  • leukotoxin production
  • damage of macrophages and endothelial cells
6
Q

Antigens?

A

Antigens

  • cell wall (cannot be used in diagnostics)
  • capsule (M. haemolytica and B. trehalosi have common system)
  • M. haemolytica 12 types
  • B. trehalosi 4 types
7
Q

Resistance?

A

Weak

8
Q

Pathogenecity?

A

Pathogenicity:

M. haemolytica • ruminants pneumonia • lamb septicaemia • mastitis • arthritis

• B. trehalosi • acute systemic pasteurellosis of feedlot lambs

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