Micro: Eye Infections

Question 1

Main causative agent in infections outside the eye but in the orbital region such as blepharitis and styes.

Answer 1

Staph aureus

Question 2

Swimming pool conjunctivitis.

Answer 2

Adenovirus

Question 3

How can an infectious conjunctivitis be distinguished from an allergic conjunctivitis?

Answer 3

Infectious forms can spread from one eye to the other. Allergic forms tend to affect both eyes simultaneously.

Question 4

Most serious viral conjunctivitis.

Answer 4

Herpes Simplex

Question 5

AIDS conjunctivitis

Answer 5

Cytomegalovirus

Question 6

Neonatal conjunctivitis

Answer 6

Chlamydia trachomatis, Neisseria gonorrhoeae

Question 7

FLIES, fomites, fingers

Answer 7

Chlamydia trachomatis, serotypes A-C

-most common world wide eye infection

Question 8

Thayer Martin Agar

Answer 8

N. gonorrhoeae

Question 9

Pharyngoconjunctival fever

Answer 9

Adenovirus (swimming pools)

-self limiting with sore throat and red eyes

Question 10

Keratoconjunctivitis

Answer 10

Adenovirus (classical pink eye, not from swimming pools)

• no sore throat
• highly contaigious
• red eyes, fever

Question 11

Syncytia on Tzank smear

Answer 11

HSV-1, HSV-2, or VZV

-giant multinucleated cells diagnostic during eye infections

Question 12

Owl’s Eye Inclusions

Answer 12

Cytomegalovirus

-CMV retinitis in AIDS patients

Question 13

Acute hemorrhagic conjunctivitis

Answer 13

Coxsackie A24 or Enterovirus E70

Question 14

Koplik Spots

Answer 14

Measles

Question 15

Cataract, Gluacoma

Answer 15

Rubella

Question 16

Wearing contact lenses for too long causing corneal abrasions

Answer 16

Pseudomonas a.

Question 17

Hematogenous spread, pseudohyphae, floaters, eye pain

Answer 17

Candida Albicans

-can lead to blindness

Question 18

KOH prep

Answer 18

fungi and parasites

Question 19

Sabouraud Dextrose

Answer 19

Fungi only

Question 20

homemade contact solution, swimming in fresh water

Answer 20

Acanthamoeba

-leads to cataracts and vision loss

Question 21

Wet mount

Answer 21

diagnositc of any type of amoeba

Question 22

Undercooked pork

Answer 22

Toxoplasmosis

Question 23

Larvae encyst in eye

Answer 23

Trichinella Spiralis

Question 24

Black Fly, blindness

Answer 24

Onchocerca volvulus

-African River Blindness

Question 25

Chrysops Fly, no blindness

Answer 25

Loa loa

-rainforests of west Africa