Bacterial Conjunctivitis (Pink Eye) Guidelines

Updated: Aug 17, 2024
  • Author: Karen K Yeung, OD, FAAO; Chief Editor: Andrew A Dahl, MD, FACS  more...
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Guidelines

Guidelines Summary

The following are guidelines on bacterial conjunctivitis treatment by the American Academy of Ophthalmology [34] :

Mild conjunctivitis

  • Empiric choice of antibiotic is common for bacterial conjunctivitis
  • A 5- to 7-day course of a broad-spectrum topical antibiotic typically is effective
  • Selection of antibiotic can be based on convenience or cost, as no specific antibiotic is superior
  • Povidone-iodine 1.25% ophthalmic solution may be as effective as topical antibiotics, especially in resource-limited settings
  • There is no data supporting the cost-effectiveness of antibiotics for mild bacterial conjunctivitis; however, their use can shorten morbidity and should be considered on an individual basis.

Moderate to severe bacterial conjunctivitis

  • Moderate to severe bacterial conjunctivitis is characterized by purulent discharge, pain, and marked eye inflammation
  • Conjunctival cultures and Gram staining should be done if gonococcal infection is suspected
  • Choice of antibiotic for severe cases is guided by laboratory test results
  • Methicillin-resistant S aureus (MRSA) increasingly is isolated in bacterial conjunctivitis cases
  • MRSA is resistant to many commercially available topical antibiotics
  • Infants in neonatal intensive care (NICU) with low birth weight or gestational age are more likely to have gram-negative resistant conjunctivitis that is resistant to gentamicin
  • Microbiology testing may guide therapy, which could include compounded topical antibiotics like vancomycin

Gonococcal conjunctivitis

  • Systemic antibiotic therapy is needed to treat gonococcal conjunctivitis
  • Saline lavage can promote comfort and faster resolution of inflammation
  • Topical treatment for bacterial keratitis should be added if there is corneal involvement
  • Patients and their sexual contacts should be informed about the possibility of concomitant diseases and referred as appropriate
  • Sexual abuse should be considered in pediatric patients with gonococcal or Chlamydia infections
  • Daily follow-up is recommended for patients with gonococcal conjunctivitis until resolution
  • At each follow-up visit, obtain interval history and perform visual acuity measurement and slit-lamp biomicroscopy 
  • Patients with other types of bacterial conjunctivitis should return for a follow-up visit in 3 to 4 days if there is no improvement
  • Neisseria meningitis should be ruled out as the causative organism before attributing the infection to N gonorrhoeae

Chlamydial conjunctivitis

  • Systemic therapy is indicated for infants with chlamydial conjunctivitis due to potential infections at other sites
  • Empiric antibiotic therapy can be considered for patients with symptoms strongly suggestive of chlamydia, such as follicular conjunctivitis persisting for several weeks
  • There is no evidence to support the use of topical therapy in addition to systemic treatment
  • Patients should be reevaluated following treatment due to a high incidence of treatment failure
  • Follow-up visit should include interval history, visual acuity measurement, and slit-lamp biomicroscopy
  • Adult conjunctivitis typically responds to systemic therapy, and sexual contacts should be treated simultaneously
  • Patients and sexual contacts should be told about the possibility of concomitant diseases and referred as appropriate
  • Sexual abuse should be considered in children with chlamydial conjunctivitis
  • In low- to middle-income countries with limited antibiotic access, povidone-iodine 1.25% ophthalmic solution can be used to treat chlamydial conjunctivitis