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Causes

By Mayo Clinic staff

Trachoma is caused by certain subtypes of Chlamydia trachomatis, a bacterium that can also cause the sexually transmitted infection chlamydia.

Trachoma spreads through contact with discharge from the eyes or nose of an infected person. Hands, clothing, towels and insects can all be routes for transmission. In the world's developing countries, flies are a major means of transmission.

Risk factors Symptoms
References
  1. Hygiene-related diseases: Trachoma. Centers for Disease Control and Prevention. http://www.cdc.gov/healthywater/hygiene/disease/trachoma.html. Accessed Aug. 17, 2012.
  2. Water-related diseases: Trachoma. World Health Organization. http://www.who.int/water_sanitation_health/diseases/trachoma/en/index.html. Accessed Aug. 17, 2012.
  3. Wright HR. Epidemiology, diagnosis, and management of trachoma. http://www.uptodate.com/index. Accessed Aug. 17, 2012.
  4. Trachoma. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/eye_disorders/conjunctival_and_scleral_disorders/trachoma.html?qt=trachoma&alt=sh. Accessed Aug. 17, 2012.
  5. Conjunctivitis. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/eye_disorders/conjunctival_and_scleral_disorders/conjunctivitis.html?qt=conjunctivitis&alt=sh. Accessed Aug. 23, 2012.
  6. Trachoma overview. International Trachoma Initiative. http://trachoma.org/world%E2%80%99s-leading-cause-preventable-blindness. Accessed Aug. 17, 2012.
  7. WHO simplified trachoma grading system. Community Eye Health. 2004;17:52. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1705737. Accessed Aug. 23, 2012.
  8. Prevention of blindness and visual impairment: Trachoma. World Health Organization. http://www.who.int/blindness/causes/trachoma/en/index.html. Accessed Aug. 24, 2012.
  9. Blindness, trachoma in children under 10 in 2003. Global Health Atlas. World Health Organization.http://apps.who.int/globalatlas/dataQuery/. Accessed Sept. 6, 2012.
  10. Robertson DM (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 5, 2012.
DS00776 Oct. 3, 2012

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