Which microorganisms are common causes of viral conjunctivitis (pink eye)?

Updated: Mar 24, 2020
  • Author: Ingrid U Scott, MD, MPH; Chief Editor: Andrew A Dahl, MD, FACS  more...
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Viruses are a common cause of conjunctivitis in patients of all ages. A variety of viruses can be responsible for conjunctival infection; however, adenovirus is by far the most common cause, and herpes simplex virus (HSV) is the most problematic. Less common causes include varicella-zoster virus (VZV), picornavirus (enterovirus 70, Coxsackie A24), poxvirus (molluscum contagiosum, vaccinia), and human immunodeficiency virus (HIV). Rarely, conjunctivitis is seen during systemic infection with influenza virus, Epstein-Barr virus, paramyxovirus (measles, mumps, Newcastle), or rubella. (See Etiology.) [3]

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