Toxoplasma encephalitis – A presenting feature of HIV disease

Abstract

Central nervous system (CNS) toxoplasmosis is one of the leading causes of secondary CNS infection and seizures in human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS) patients along with cryptococcosis and tuberculosis. Encephalitis can be a primary presentation in undiagnosed HIV patients. We are reporting a rare case of HIV/AIDS that presented to us with encephalitis and was later diagnosed as toxoplasma encephalitis. A 32-year-old male truck driver presented with altered behaviour for about 1 month and vomiting for 4 days. On clinical examination, papilloedema was present. Further investigations revealed serologically proven HIV with CD4 T lymphocyte count of 56 cells/microL. Brain imaging showed multiple ring-enhancing lesions in the bilateral cerebral hemispheres and right cerebellar hemisphere. Serum toxoplasma antibodies were found to be positive and a diagnosis of CNS toxoplasmosis encephalitis was made. Treatment with trimethoprim–sulphamethoxazole and highly active antiretroviral therapy was initiated following which there was a significant improvement in the patient's clinical condition. The patient is on regular follow-up now.