How is epidemic keratoconjunctivitis (EKC) differentiated from ocular herpes and chlamydial conjunctivitis?

Updated: Mar 03, 2021
  • Author: Michael A Silverman, MD, FACEP; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Check for preauricular adenopathy and a follicular conjunctival change, particularly on the palpebral conjunctiva. If present, the likely diagnosis is EKC. Be aware that herpes simplex and chlamydia also cause follicular conjunctivitis and preauricular adenopathy.

Preauricular adenopathy is common in EKC and herpes, whereas chemosis is variable.

The conjunctival discharge amount is moderate, stringy, or sparse, with a thin and seropurulent quality. There is moderate or marked conjunctival injection.

See Viral Conjunctivitis.

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