Seroprevalences of Toxoplasma gondii antibodies were assessed with the use of a commercial indirect ELISA in 1,501 domestic ruminants in southern Spain. Antibodies against T. gondii were detected in 420 (83.3%) of 504 cattle, 248 (49.3%) of 503 sheep, and 124 (25.1%) of 494 goats. The herd seroprevalence was 100% (72/72), 84.7% (61/72), and 72.2% (52/72) for cattle, sheep, and goats, respectively. Seropositivity was significantly higher in herds with a low density of animals (P < 0.001). Significant differences (P < 0.05) among municipalities were also found. The seroprevalence observed in the present study indicates a widespread exposure to T. gondii in livestock in southern Spain.

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