Final answer:
Toxoplasma gondii is a protozoan organism that causes toxoplasmosis. It can be transmitted to humans through various means and can cause neurotoxoplasmosis in immunocompromised individuals.
Step-by-step explanation:
Toxoplasma gondii is a protozoan organism that causes the disease toxoplasmosis. T. gondii has a complex life cycle involving multiple hosts, with cats being the definitive host. It can be transmitted to humans through contact with cat feces, contaminated meat, or ingestion of oocysts in the environment. T. gondii can cause neurotoxoplasmosis in immunocompromised individuals, leading to brain abscesses.