ABSTRACT
This chapter deals with neosporosis in pigs. Currently, there is no credible evidence that N. caninum causes clinical disease in pigs. In one study, two adult sows inoculated IM with 2.5 × 106 tachyzoites of the NC1 isolate remained clinically normal but developed N. caninum antibodies within 2 weeks PI. In another experiment concerning pregnant sows in Denmark, six sows were inoculated IM with 2.5 × 106 tachyzoites of the Swedish isolate (Nc-SweB1) of N. caninum at day 48–101 of gestation and the gilts were euthanized at near the parturition time. It was observed, inter alia, that gilts became seropositive as early as 9 DPI and all gilts remained asymptomatic, but lesions were demonstrable in the liver of 3 gilts; tachyzoites were found in livers of 2 gilts (nos. 5 and 6) and in the endometrium of gilt no. 1.
