Toxoplasma gondii prevalence in farm animals in the United States

► Toxoplasmosis is a significant public health problem in the US with more than 1 million people newly infected each year. ► Seroprevalence in pigs and chickens from non-biosecure management systems is high. ► Clinical disease, especially abortion, and high seroprevalence occurs in sheep and goats. ► Beef cattle do not appear to be important in the epidemiology of Toxoplasma or in transmission to humans. ► Type II and Type III clonal lineages and atypical genotypes predominate in food animals in the US.