Technical Abstract: Infections by the protozoan parasite, Toxoplasma gondii, are widely prevalent worldwide in animals and human beings. Cats are the only definitive hosts for T. gondii and all other warm-blooded animals are intermediate hosts. Cats excrete the environmentally-resistant oocysts after ingesting any of the three infectious stages of T. gondii, tachyzoites, bradyzoites, and oocysts. Humans and other hosts become infected with T. gondii by ingesting uncooked infected meat, by ingesting food and water contaminated with oocysts, or transplacentally. Cats can excrete millions of oocysts after ingesting tissues of infected animals and oocysts can survive in the harsh environment for months. Contamination of sea water can occur from the oocysts washed off the land and marine mammals can acquire T. gondii infection and some die from toxoplasmosis.