External Inflammation

Question 1

What pathogen causes Infectious Crystaline Keratopathy?

Answer 1

Strep. viridans

Question 2

Small peripheral ulcers are most often caused by what strain of staph?

Answer 2

Cog. -

Question 3

How should you treat a sterile marginal infiltrate that shows mixed findings with an infectious keratitis?

Answer 3

Topical antibiotics and withould steroids for 48hours. If at that time infection can be ruled outh, then a low dose topical steroid can be applied

Question 4

What organisms may cause stromal infection without an epithelial defect?

Answer 4

Fungal
Acanthamoeba, Herpes simplex or herpess zoster
Infectious crtystalline keratophay
Mycobacteria

Question 5

What organisms may cause immune stromal keratitis without an epithelial defect?

Answer 5

Herpes simplex or herpes zosseter

Sphiis

Question 6

What effect does a contact lens have on the cornea that allows bacteria to adhere more readily?

Answer 6

Breakdown of epithelial glycocalyx

Microabrasions

Question 7

How often should patients replace their contact lens CASE? What antimicrobial case system works best?

Answer 7

Silver impregnated case mateirals everyt 3 months

Question 8

What organisms can penetrate an intact corneal epithelium? (CANALS) (6)

Answer 8

Corynebacterium diphtheriae
Hemophilus Aegyptus
Neisseria gonorrheaea
Acanthomoeba
Listeria
Shigella

Question 9

What are the most common commensal organisms in bacterial keratitis? (3)

Answer 9

Staph epidermidids
Staph aureus
Cronynebacerium xerosis

Question 10

Biofilms play a role in the pathogenicity of what organisms in contact lens related infections?

Answer 10

Pseudomonas

Fusarium