Contact Lenses Are Home To Pathogenic Amoebae

Contact lenses increase the risk of infection with pathogenic protozoa that can cause blindness. New research, published in the November issue of the Journal of Medical Microbiology, shows that a high percentage of contact lens cases in Tenerife are contaminated with Acanthamoeba that cannot be killed by normal contact lens solution.

Acanthamoeba is one of the most common types of protozoa in soil and is often found in fresh water. Most species eat bacteria and some can cause infections in humans. One of the diseases caused by Acanthamoeba is called amoebic keratitis, which is an infection of the eye.

Around 85% of all amoebic keratitis cases occur in people who wear contact lenses. The infection is very painful and can cause blindness. As the amoeba can be found in chlorinated swimming pools and domestic tap water, people who wear lenses while swimming or use tap water to rinse their lenses have an increased risk of infection.

Source: EurekAlert, 20 October 2008

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