Corneal Infections

Question 1

Causes of Infectious Bacterial Keratitis

Answer 1

usually only with epithelial compromise, but healthy can be infected by Neisseria, H. influenza
P. aeruginosa- Gram -
S. aureus
Strep

Question 2

Signs of Infectious Bacterial Keratitis

Answer 2

epithelial defects
perilimbal injection
chemosis
AC rxn/ hypopyon
ulcer or infiltrates

Question 3

Pseudomonas Bacterial Keratitis

Answer 3

likely to cause severe ulceration leading to descemetocele

Question 4

Differentiating Ulcers from Infiltrates

Answer 4

staining
cross section
ulcers erode

Question 5

3-2-1 Guideline for Staining Bacterial Keratitis

Answer 5

ulcer 3mm +
2+ ulcers
ulcer w/in 1 mm of visual axis

Question 6

Tx for Bacterial Keratitis

Answer 6

discontinue contacts
antibiotics
mydriatics
steroids

Question 7

Antibiotics for Bacterial Keratitis

Answer 7

hourly drops of 4th gen fluoroquinolone

moxifloxacin or gatifloxacin