Histological sections of brain from cattle infected with N. caninum
tachyzoites. (A)Asection of corpus striatum from animal 7. Focal reactive glial
cell infiltration as indicated byHEstaining (magnification,20). (B)Asection
of mesencephalon from calf 4, showing a cyst as determined by IHC with
anti-N. caninum polyclonal antiserum (magnification, 60).