Microbiology Flashcards
Infecting organisms for bacterial conjunctivitis in neonates and older adults?
Neonates = staph aureus, chlamydia and gonorrhoea
Other ages = staph aureus, strep pneumonia and Haem influenzae
What is the treatment of bacterial conjunctivitis?
Chloramphenicol (topical) QDS. DO NOT use if aplastic anaemia.
2nd line = Fusidic acid
If patient is a contact lens wearer and you do not detect any corneal staining with fluorescein then do not refer :)
What should you suspect in bilateral conjunctivitis in young adults?
Chlamydia conjunctivitis:
- Follicles
- Subtarsal scarring
What is keratitis?
Inflammation of the cornea
What needs to be done for bacterial keratitis?
What sign can sometimes be seen in bacterial keratitis?
Admission for hourly drops.
Usually occurs in contact lens wearer
A hypopyon can sometimes be seen (a leukocytic exudate seen in the anterior chamber)
Clinical sign in herpetic keratitis?
Dendritic ulcer
Consequence of treating herpetic keratitis with steroids?
Can produce a corneal melt and perforation of the cornea
Clinical syndrome of adenoviral keratitis?
- Bilateral
- Usually follows an URTI
- Contagious
- Subepithelial infiltrates
Cause of keratitis in contact lens wearers?
Psuedomonas aueruginosa
What is endopthalmitis?
Devastating infection of the inner eye:
- Post surgical or endogenous aetiology
- Very red eye
- Pain +++
Which organism most commonly causes endopthalmitis?
Staph Epidermis (think E E)
Treatment of endopthalmitis?
Intravitreal amikacin, ceftazdime, vancomycin and topical antibiotics
Chloramphenicol and babies?
Grey baby syndrome
Chloramphenicol treats most bacterias except what?
Pseudomonas auerginosa
Treatment of chlamydial conjunctivitis?
Topical oxytetracycline, can also use oral azithromycin if genital involvement
