Certified Ophthalmic Medical Technologist (COMT) Practice Exam

What parasite is primarily associated with the disease toxoplasmosis?

1. Plasmodium falciparum

2. Toxoplasma gondii

3. Giardia lamblia

4. Ascaris lumbricoides

The correct answer is: Toxoplasma gondii

Toxoplasmosis is primarily caused by the parasite Toxoplasma gondii. This single-celled organism is a member of the Apicomplexa group of parasites, which are known for their complex life cycles and ability to infect a wide range of hosts, including humans. Toxoplasma gondii can be transmitted through various routes, such as ingestion of oocysts from contaminated food or water, exposure to cat feces, or consumption of undercooked meat containing the parasite's cysts. The other parasites listed play significant roles in other diseases. Plasmodium falciparum is responsible for causing malaria, which is transmitted by female Anopheles mosquitoes. Giardia lamblia causes giardiasis, often linked to contaminated water supplies, and Ascaris lumbricoides is a common intestinal helminth associated with ascariasis, a type of roundworm infection. Understanding the specific pathogens associated with particular diseases is crucial for effective diagnosis and treatment. In the case of toxoplasmosis, recognizing Toxoplasma gondii as the causative agent underscores the importance of awareness regarding transmission routes and prevention measures.