| toxoplasma gondii in an african crested porcupine (hystrix cristata). | an adult female crested porcupine (hystrix cristata) was evaluated for acute onset of neurologic signs including head tilt, circling, and ataxia. she was found dead in her holding area 2 days after initially exhibiting clinical signs. necropsy was unremarkable. histopathology of brain tissue revealed the presence of protozoal cysts associated with inflammation as the underlying cause of clinical signs and death. immunohistochemical staining of brain tissue for toxoplasma gondii was strongly posi ... | 2007 | 17402616 |