Moraxella Flashcards
Moraxella is a gram _____ bacteria.
Negative
True/False. M. bovis is pleomorphic rods in pairs or chains that are non-motile.
True
M. bovis is catalase _____ and oxidase ______.
Positive and positive
True/False. Moraxella bovis is an obligate symbiotic and obligate pathogenic.
True
True/False. M. bovis is not resistant in the environment.
FALSE.
Moraxella bovis has quite a resistance in the environment
Which species of Moraxella causes infectious bovine keratoconjunctivitis and is highly infectious?
M. bovis
Serous to purulent conjunctivitis and keratitis
What is an essential virulence factor to M. bovis?
Fimbriae
Adhesion to host cell (eye): conjunctival and corneal epithelial cells
What is the general pathogenesis of M. bovis?
- Attachment of bacteria to conjunctival/corneal epithelia
- Production of toxin and destuction of tissue
- Inflammation
- More growth and toxin production and more damage
- Increased susceptibility for other pathogens
- Irreversible eye damage
What other organisms cause infectious bovine keratoconjuntivitis?
Bovine herpes virus 1
Myoplasma bovoculi
Listeria monocytogenes
How is pink eye transmitted?
Direct contact with infected animals
Also flies
How do you treat pink eye?
Antibiotics: local and systemically when serious
Corticosteroids if inflammation is serious
Which species of Moraxella is diplococci and associated with keratoconjunctivitis in bovines?
M. bovoculi
Which species of Moraxella is diplococci and associated with keratoconjunctivitis AND pneumonia in bovines?
M. ovis
