T. gondii antibodies have been found in canine sera worldwide (Table 7.1). The table also includes data from dogs admitted to hospitals for undiagnosed illness. In general, seroprevalences increased with age, indicating postnatal infection. Seropositivity was higher in older dogs832 and in dogs from rural areas.241 In a survey of 658 dogs from Taiwan, Lin832 found IgM antibodies in 2%. Yarim et al.1380 reported prevalence of different classes of serum globulins in dogs from Turkey. Additionally, Lee et al.816 detected T. gondii DNA in sera of 46.3% of 138 dogs from Korea.