What is the causative agent for toxoplasmosis?

Toxoplasmosis is primarily caused by the protozoan parasite Toxoplasma gondii. This organism is a member of the Apicomplexa phylum and is typically transmitted to humans through contact with contaminated food, soil, or water, as well as through ingestion of undercooked or raw meat containing the tissue cysts of the parasite.

Toxoplasma gondii can also be transmitted from mother to fetus during pregnancy, leading to serious complications in newborns. Its lifecycle includes both intermediate hosts, such as humans and various animals, and definitive hosts, primarily cats, where the parasite reproduces sexually.

Understanding the biology and transmission routes of Toxoplasma gondii is crucial for controlling and preventing toxoplasmosis, especially among vulnerable populations such as pregnant women and immunocompromised individuals. This context highlights why recognizing the correct causative agent is essential for studying the disease and its implications in public health.