Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

FAMS > Pink Eye and SSC > Flashcards

Pink Eye and SSC Flashcards

1
Q

What are the major diseases of the bovine eye?

A

Infectious: Infectious Bovine Keratoconjunctivitis (IBK) - pink eye, squamous cell carcinoma and trauma or foreign body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where is the ulcer on a cow with trauma or a foreign body?

A

Not central! (Pink eye central) - see best with stain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why does the producer care about IBK?

A

Can’t see to reproduce or eat and grow (decreased weaning weight)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Is IBK painful?

A

Yes!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are other cost associated with IBK?

A

Decreased milk production, less growth of calves, sale discounts due to scaring, decreased value of breeding stock, treatment cost, prevention cost and welfare of animal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the primary pathogen in IBK?

A

Moraxella bovis and boviculi - pili, attach to cornea, local persistance, sytotoxins, epithelial cell lysis and pore in cornea (ulcer), lysis of neutrophils release enzymes, damage phospholipids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Can cattle be a carrier of Mycoplasma Bovis?

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What environmental factors help increase pathogenicity of pink eye?

A

UV damage, dust, plant material and feeds, female face flies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What kind of cows are predisposed?

A

Herefords and Holstein (white around eyes make UV damage worse)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are other risk factors for IBK?

A

Summer or Winter (heat and flies or feeding practices/confinement/snow)
Age - calves more likely than cows
Nutritional deficiencies- protein, energy, vitamin A, copper and selenium
Bos taurus more likely (Hereford and baldies)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the clinical signs of pink eye?

A

Scleral injection
Epiperoa (tearing)
blasospasms (blinking)
Corneal Edema
Central corneal ulcer (not scar)
neovascularization
Photophobia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Do you need to treat a scar? What does it look like?

A

No, it is not raised, shiny has a tear film over it and no other signs (tearing or blinking)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are some sequelae to pink eye?

A

Glaucoma
Bupthalmos
Blindness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How effective are pink eye vaccines?

A

Not very but anything you can do can help (environmental control of flies best first step though)
-Autogenous best (culture cow on farm and use that strand) - need 150 dose minimum filled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is IBK treament?

A

Bulbar scleral injections of 1-2ml of penicillin procaine G and 0.5-1ml Dexamethasone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What drugs are labeled for pink eye?

A

Oxytetracyline, Draxxin

17
Q

Extralabel drugs for pink eye?

A

Nuflor, Excede

18
Q

What are some prevention strategies?

A

Fly control, pasture management (weed and bushog), feed management and UV protection

19
Q

What are some other infectious etiologies with ocular manifestations?

A

Mycoplasma (conjunctivitis), IBR (conjunctivitis, edema, neovascular), Malignant Catarrhal Fever, Listeriosis, BVD, Neonatal Septicemia

20
Q

What kind of neoplasia likes the eye?

A

Squamous cell carcinoma
Lymphoma can cause exophthalmia

21
Q

What is cancer eye?

A

Squamous cell carcinoma

22
Q

What is a leading cause of whole carcass condemnation in US?

A

Cancer eye (treat, decrease production or early culling)

23
Q

Where does SCC like to be?

A

Conjunctive, Corneosclearl junciton, nicitating membrane, cornea and eyelid

24
Q

What are risk factors for SCC?

A

Older, UV light, Breed (white faced), genetics

25
Q

Might there be a viral component to SCC?

A

Herpes?

26
Q

Diagnosis of Cancer Eye?

A

Epiphora
Blephorospasms
Breed or white face
(examine white face cattles eye once a year)
Assess depth invasion

27
Q

How do you decide whether to treat or cull?

A

Based on the stage (1-4) and location

28
Q

Where is SCC more aggressive when found in that location?

A

Nictitating membrane and lower eyelid

29
Q

By what stage is SCC most likely in the lymph nodes and will cause whole carcass condemnation?

A

Stage 4

30
Q

If you have stage 1-3 (plaques, keratoma, papilloma) they are benign, but will they eventually progress? How do you treat?

A

Yes
Remove it surgically 90% cure, 45% recurrence (keratectomy, 3rd eyelid removal, papilloma removal, exenteration, cryotherapy, hyperthemia

31
Q

Why would you treat SSC?

A

Prolong life of heavy bred animal or to help get young calf grown

32
Q

What’s the difference between enucleation and exenteation?

A

Enucleation: infection of the globe, glaucoma, globe rupture (traumatic or secondary)

Exenteation: ocular neoplasia, SCC>2.5cm, retrobulbar lymphosarcoma

33
Q

How do you do enucleartion?

A

Restrain, sedate, pain meds, antibiotic, clip and suture closed

FAMS (41 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions