Case 96. Toxoplasmosis of lung (50 y-o F)
    Multifocal interstitial lung lesions seen in an autopsied adult T-cell leukemia patient after chemotherapy    
Key words : Toxoplasma gondii, interstitial pneumonia
opportunistic infection, zoonosis
Alveolar pneumocytes are infected by Toxoplasma gondii, presenting tachyzoite-filled terminal colonies (HE).   Interstitial fibrosis is multifocally provoked by Toxoplasma infection (HE). Fibrinous exudation is associated.
Toxoplasma gondii antigens are demonstrated in a good number of stromal cells in the fibrotic lesion (immunostaining using a polyclonal antibody).