Moraxella

Question 1

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

Answer 1

FALSE! Only 1! Moraxella bovis biotch

Question 2

Moraxella bovis causes ______

Answer 2

infectious bovine keratoconjunctivitis

Question 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

Answer 3

FALSE AGAIN; Moraxella bovis is the only one

Question 4

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

Answer 4

aerobe

eye

Question 5

The fimbriae of Moraxella bovis attach where?

Answer 5

Corneal epithelium

Question 6

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

Answer 6

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

Question 7

What are some of the enzymes Moraxella bovis uses?

Answer 7

hyaluronidase
fibrinolysin 
aminopeptidase
phosphoamidase
phosphatase

HE SAID SOMETHING ABOUT KNOWING 1/2 OF THESE IDK

Question 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

Answer 8

TRUE

Question 9

Where is Moraxella bovis normally located?

Answer 9

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

Question 10

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

Answer 10

Summer and fall

dust, UV light, and flies

Question 11

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

Answer 11

FALSE; Mycoplasma bovoculi generally initiates the infection

Question 12

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

Answer 12

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

Question 13

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

Answer 13

WRONG AGAIN; they’re pretty weak actually

Question 14

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

Answer 14

fimbrial

Question 15

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

Answer 15

ovis

Question 16

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

Answer 16

lacunata