Acanthamoeba species are opportunistic pathogens that can cause life-threatening diseases in the immunocompromised host. In healthy individuals, Acanthamoeba can cause ulcerating keratitis, which is associated with the use of improperly sterilised contact lenses, trauma or washing with contaminated water. Reports have shown that the defenses of a healthy host seemed sufficient to prevent systemic Acanthamoeba infection.
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