Moraxella Flashcards
What are the 3 clinically significant Moraxella species in veterinary medicine?
Moraxella bovis
Moraxella bovoculi
Moraxella ovis
What Moraxella species causes disease in humans?
Moraxella catarrhalis
Which moraxella species is pleomorphic rods, in pairs or short chains, and catalase and oxidase positive?
Moraxella bovis
Moraxella bovis is ______ symbiont and ______ pathogen.
Obligate; obligate
What disease does M. bovis cause in cattle?
Infectious bovine keratoconjunctivitis (pink eye)
Virulence factors of M. bovis:
Fimbriae
Capsule
Pore forming toxin
Cytotoxin
T:F/ pink eye in cattle is highly contagious, causes serous to purulent ocular discharge, and is most common in young animals.
TRUE
Pathogenesis of M. bovis infections in cattle
Attachment > production of toxins > inflammation > increased susceptibility to other pathogens and non infectious damage (dust) = IRREVERSIBLE EYE DAMAGE
How is M. bovis transmitted?
FLIES!!
What are the predisposing factors for infection by M. bovis?
Young age FLIES Dust/sun (irritants) bovine herpesvirus 1 Mycoplasma and Listeria
T/F: M. bovis can be diagnosed with culture on blood agar only.
FALSE: it can also be diagnosed with immunofluorescence
Wtf is Bacterin?
Bacterial parts used in the vaccine for M. bovis, given at 4 weeks of age to reduce disease.
You go to a farm and find young cattle with flies on their faces and purulent ocular discharge. None of the cattle have been vaccinated, and you suspect M. bovis infection. How do you treat?
Topical and systemic antibiotics
Corticosteroids
Separate sick animals
Moraxella species that is cocci or diplococci and causes keratoconjunctivitis in cattle:
Moraxella bovoculi
Moraxella species that is cocci and causes keratoconjunctivitis in cattle and sheep/goats:
Moraxella ovis
