Summary
Serum samples from 1,000 dairy goats from northwest United States (1982 to 1984) were examined for Toxoplasma gondii antibodies by a modified agglutination test. Toxoplasma gondii antibody titers were <1:40 for 779 goats, 1:40 for 153 goats, and ≥1:400 for 68 goats. Seroprevalence increased with age of goats; 3.7% of 54 six-month-old goats were seropositive (≥1:40) vs 17.8% of 218 one-year-old goats.