Moraxella Flashcards
Moraxella are ____ gram negative rods that are catalase and oxidase ____
pleomorphic
positive
What species of Moraxella is most important?
Moraxella Bovis
What does Moraxella Bovis cause in Cows?
infectious bovine keratoconjunctivitis
Is eye infection is cows infectious?
Highly infectious
easily transmitted from one cow to the next
What is necessary for virulence in Moraxella?
Cytotoxin and Fimbriae
Fimbria help with what in Moraxella?
adherance to the conjunctival and corneal cells
Moraxella lacks a ____ but still acts like normal LPS
O repeat unit
What is the main toxin in Moraxella bovis?
Moraxella bovis toxin
*cytotoxin causes beta hemolysis on blood agar
True/False: Morexlla is resistant to antibiotics
False
susceptible to antibiotics
non ____ variants are nonpathogenic
hemolytic
What exacerbates the condition in Moraxella?
Ultraviolet irradiation
flies
co infections- Bovine herpes, adenovirus, mycoplasma ect.
Infectious Bovine Keratoconjunctivits causes what in cows?
epiphora- tears
edema
ulceration
panophthalmitis
*if not taken care of this disease can progress and allow other opporunistic infections to occur
Moraxella conjunctivitis takes a long time to heal and looks similar to ____
pink eye
what can you see in advanced cases of Conjunctivits in cows?
chronic purulent and ulcerative keratitis
Who is more predisposed for Moraxella infection?
young animals
beef cattle are more susceptible
animals that lack eyelid pigmentation
