Case 126. 

Toxoplasma cysts under latent infection in mouse brain
　 　 　 　
　 Two mature cysts containing bradyzoites are observed in the cerebral cortex (HE). 　
　 　 　 　

　

 　 Under the immunosuppressied state, transformation of the bradyzoites of the cyst into tachyzoites may occur in the brain.