Toxoplasma gondii is a single-celled parasite that can infect many warm-blooded animals, including humans. It is commonly found in cats, which are the primary hosts. The parasite can be transmitted through contaminated food, water, or soil, as well as through contact with cat feces. In humans, infection often goes unnoticed and may cause mild flu-like symptoms. However, it can be more serious for pregnant women and individuals with weakened immune systems, potentially leading to complications. Preventive measures include proper food handling and hygiene practices to reduce the risk of infection.