Infectious Disease Compendium

Conjunctivitis

Diagnosis

Redness of the conjunctiva.

Epidemiologic Risks

Depends on the organism.

Microbiology

Bacterial: S. aureus and S. pneumonia are the most common organisms in the adult; if you put your finger in your eye, any organism can be inoculated.

Viral: Epidemic keratoconjunctivitis: most commonly Adenovirus serotype 8 and others; Enterovirus 70 causes hemorrhagic conjunctivitis; as well as Coxsackievirus and Adenovirus.

Every class of organism can infect the conjunctiva so history and cultures are important.

Empiric Therapy

Usually an antibiotic eye drop for 10 days: quinolone and aminoglycosides both come in eye drops, which one you use makes little difference.

Pearls

A few diseases that can manifest in the eye: Leptospirosis (suffusion) Tularemia, Syphilis, Bartonella (Parinauds syndrome).

Rants

ICD9 Codes (Soon to be supplanted by ICD10)

Conjunctivitis NEC 372.30; acute hemorrhagic 077.4; adenoviral (acute) 077.3; allergic (chronic) 372.14; chlamydial 077.98; filariasis 125.9 ; hemorrhagic (acute) (epidemic) 077.4; herpetic (simplex) 054.43; influenzal 372.03; mucocutaneous leishmaniasis 085.5 ; parasitic 372.15; purulent 372.03; Reiter's disease 099.3 ; syphilis 095.8 ; toxoplasmosis (acquired) 130.1, congenital (active) 771.2; tuberculous 017.3 ; tularemic 021.3; viral 077.99; zoster 053.21.