https://en.wikipedia.org/wiki/Toxoplasma_gondiiT. gondii is one of the most common parasites in developed countries;[16][17] serological studies estimate that 30–50% of the global population has been exposed to, and may be chronically infected with, T. gondii; although infection rates differ significantly from country to country.[18][19] For example, estimates have shown the highest IgG seroprevalence to be in Ethiopia, at 64.2%, as of 2018
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2094759/T gondii is the most significant foodborne parasite because it is common, its acquisition can be devastating and it places an immense financial burden on society. The most likely route of exposure is through consumption of undercooked meat; pork or lamb are more likely to be infected than beef (Table 2) (10). Cattle appear to develop a more effective immune response to toxoplasma than sheep. Additionally, T gondii may be acquired from accidental ingestion of oocysts in cat excrement, by transplant or transplacentally, a potentially devastating consequence. Tizard et al (14) tested 7060 human serum specimens from a cross section of Ontario residents for antibody to T gondii and found 38% testing positive. As the population ages, the incidence rises due to increased opportunity for exposure. Rates of seropositivity are known to climb from 2.7% in infants, who have had little opportunity to be exposed to T gondii, to 50% in individuals aged 25 years or older, who have had increased opportunities for exposure
