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Flashcards in Moraxella Deck (16)
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1

T/F There's like 13 of these damn species we need to know of as vets

FALSE! Only 1! Moraxella bovis biotch

2

Moraxella bovis causes ______

infectious bovine keratoconjunctivitis

3

T/F While we really only care about Moraxella bovis, Moraxella bovoculi and ovis have also been demonstrated to show infection via Koch's postulates

FALSE AGAIN; Moraxella bovis is the only one

4

One of Moraxella bovis unique features is that it is a strict _______ so it won't advance past the _______

aerobe
eye

5

The fimbriae of Moraxella bovis attach where?

Corneal epithelium

6

What are some toxins of Moraxella bovis? What do they do?

Fimbriae
Cytotoxin: RTX that lyses corneal epithelium cells and neutrophils
Hemolysin: this is directly related to virulence
Enzymes: break down junction between corneal epithelium and cause inflammation

7

What are some of the enzymes Moraxella bovis uses?

hyaluronidase
fibrinolysin
aminopeptidase
phosphoamidase
phosphatase

HE SAID SOMETHING ABOUT KNOWING 1/2 OF THESE IDK

8

T/F Part of the extensive damage done by Moraxella bovis is partially due to the cytotoxin lysing neutrophils, causing their contents to be spilled

TRUE

9

Where is Moraxella bovis normally located?

Conjunctiva of the eye of cattle; non-invasive under normal conditions

10

Infection with Moraxella bovis is common in the ________ months and is often associated with _________

Summer and fall
dust, UV light, and flies

11

T/F Moraxella bovis initiates IBK after damage to corneal epithelium

FALSE; Mycoplasma bovoculi generally initiates the infection

12

T/F The lesions caused by Moraxella bovis are pretty harmless

FALSE: HAVE YOU SEEN THESE THINGS?! THEY'RE HORRIBLE

13

T/F Antibody in the tears are enough to protect against this

WRONG AGAIN; they're pretty weak actually

14

______ vaccines have been shown to reduce the severity of Moraxella bovis infections

fimbrial

15

Moraxella ______ has been associated with pinkeye in cattle and sheep but is definitely not the main cause

ovis

16

Moraxella _______ used to be isolated from pinkeye in humans; is rarely isolated now

lacunata