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Flashcards in Moraxella Deck (13)
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1
Q

Moraxella is a gram _____ bacteria.

A

Negative

2
Q

True/False. M. bovis is pleomorphic rods in pairs or chains that are non-motile.

A

True

3
Q

M. bovis is catalase _____ and oxidase ______.

A

Positive and positive

4
Q

True/False. Moraxella bovis is an obligate symbiotic and obligate pathogenic.

A

True

5
Q

True/False. M. bovis is not resistant in the environment.

A

FALSE.

Moraxella bovis has quite a resistance in the environment

6
Q

Which species of Moraxella causes infectious bovine keratoconjunctivitis and is highly infectious?

A

M. bovis

Serous to purulent conjunctivitis and keratitis

7
Q

What is an essential virulence factor to M. bovis?

A

Fimbriae

Adhesion to host cell (eye): conjunctival and corneal epithelial cells

8
Q

What is the general pathogenesis of M. bovis?

A
  1. Attachment of bacteria to conjunctival/corneal epithelia
  2. Production of toxin and destuction of tissue
  3. Inflammation
  4. More growth and toxin production and more damage
  5. Increased susceptibility for other pathogens
  6. Irreversible eye damage
9
Q

What other organisms cause infectious bovine keratoconjuntivitis?

A

Bovine herpes virus 1

Myoplasma bovoculi

Listeria monocytogenes

10
Q

How is pink eye transmitted?

A

Direct contact with infected animals

Also flies

11
Q

How do you treat pink eye?

A

Antibiotics: local and systemically when serious

Corticosteroids if inflammation is serious

12
Q

Which species of Moraxella is diplococci and associated with keratoconjunctivitis in bovines?

A

M. bovoculi

13
Q

Which species of Moraxella is diplococci and associated with keratoconjunctivitis AND pneumonia in bovines?

A

M. ovis