evidence: Toxoplasmosis is a condition that develops following infection with the microscopic parasite Toxoplasma gondii. The parasite can affect all mammals, but cats particularly are important in the lifecycle and transmission of this parasite. [...] The parasite has a global distribution and is more common in tropical climates. Overall, it’s estimated that around 50% of the cats in the world have been infected by Toxoplasmosis at some stage in their lives. However, most cats show no detectable outward sign of Toxoplasma infection, so owners are unlikely to be aware that this has happened. [...] Toxoplasmosis is a complex microscopic parasite that rarely can cause serious disease in cats and humans.