Acanthamoeba: Symptoms & Signs

Medically Reviewed on 3/22/2022

Acanthamoeba is a type of parasite that can rarely cause serious infections of the eye, skin, and central nervous system. The amoeba is found worldwide in water and soil. Most people are exposed to this organism during their lifetime, but very few people actually develop symptoms of an infection. A widespread infection is rare but can occur in people with weakened immune systems.

Signs and symptoms, when they occur, depend on the site of infection. Associated symptoms and signs of Acanthamoeba keratitis can include

Infections of the brain may lead to

Cause of an Acanthamoeba Infection

The Acanthamoeba parasite causes this infection.

Other acanthamoeba infection symptoms and signs

  • Blurred Vision
  • Confusion
  • Excessive Tearing
  • Eye Pain
  • Eye Redness
  • Hallucinations
  • Headaches
  • Lack of Attention to People and Surroundings
  • Loss of Balance and Bodily Control
  • Nausea
  • Seizures
  • Sensation of Something in the Eye
  • Sensitivity to Light
  • Stiff Neck
  • Tiredness
  • Vomiting

Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.