32- bacterial and fungal keratitis

Question 1

what causes bacterial keratitis ?

Answer 1

it is an infection of the cornea
because you have had contact lenses - if you go swimming in your contact lenses
wearing contact lenses and going to sleep
trauma to eye
inadequate disnifecting

or injury from eye - refractive surgery

stpah areus and pseudomonas areuginosa

Question 2

hat is the pathophysiology of cornea ?

Answer 2

there is a corneal epithelium 
bowmans layer
stroma 
descendants membrane 
endothelium 

there is a disruption in the corneal epithelium
the micrograms enters - enter through the bowman layer into the corneal stroma - necrosis and inflammation - process is QUICK -RAPID DIAGNOSIS

Question 3

symptoms for bacterial keratitis ?

Answer 3

pain
purulent secretion
PHOTOPHOBIA
decrease vision

signs - corneal thinning 
hypopyon - inflammatory cells seen in anterior chamber 
descements folds 
CHEMOSIS
ulcer seen as a -GREYISH WHITISH PLAQUE

Question 4

complication of bacterial keratitis?

Answer 4

glaucoma
synechia - iris adheres to the lens or the cornea

perforation of the cornea !!!- endopthalmitis

Question 5

diagnosis fo bacterial keratitis ?

Answer 5

corneal scarping - culture

Question 6

treatment to bacterial keratitis ?

Answer 6

broad spectrum antibiotics - moxifloxacin- 4th gen
secondary glaucoma - azetozolamide

perforation of cornea - - surgery

Question 7

why does fungal keratitis occur ?

Answer 7

fungal containing wood into the eye

aspergillus , candida albicans

Question 8

symptoms of fungal keratitis ?

Answer 8

usually asymptomatic

Question 9

signs for fungal keratitis

Answer 9

cornea is a white grey infiltrate with feathery borders
satellite lesion
hypopyon

Question 10

diagnosis of fungal keratitis ?

Answer 10

same as bacterial

Question 11

complication of fungal keratitis ?

Answer 11

same as bacterial

Question 12

what is the treatment to fungal keratitis ?

Answer 12

anti fungal drugs - amphotericin B