Certified Ophthalmic Assistant Practice Exam

Acanthamoeba is best described as what type of entity?

1. A bacteria causing conjunctivitis

2. A virus causing viral keratitis

3. A parasite found in soil and water

4. A fungal organism leading to eye infections

The correct answer is: A parasite found in soil and water

Acanthamoeba is best described as a parasite found in soil and water, which is why this choice is correct. This organism is a type of free-living amoeba that can be present in various environments, including fresh and saltwater, as well as soil. Its significance in ophthalmology arises from its ability to cause Acanthamoeba keratitis, an infection of the cornea that can occur primarily in contact lens wearers or individuals exposed to contaminated water. The fundamental characteristics of Acanthamoeba as a protozoan parasite differentiate it from other entities. Bacteria, for example, are unicellular organisms that may cause conjunctivitis but do not share the same structure or classification as Acanthamoeba. Similarly, viral entities are distinct from parasites and are often responsible for viral keratitis, but Acanthamoeba is not classified as a virus. Lastly, fungi are a separate classification of organisms that can lead to various infections, including eye infections, but they do not encompass the nature of Acanthamoeba. Understanding Acanthamoeba's classification as a parasite is essential for recognizing the specific methods of prevention, diagnosis, and treatment in the context of eye infections.