Fig. 14. Toxoplasma retinochoroiditis in a 28-year-old kidney transplant recipient who had been observed to have a healed, inactive retinochoroiditic scar on a routine ophthalmologic examination before his kidney transplantation. The patient developed retinochoroiditis after he was started on azathioprine (Immuran), 250 mg orally daily, and prednisone, 80 mg orally daily, after renal transplantation. Serologic tests revealed the Toxoplasma IgG antibody titer to be 1:64 (indirect fluorescence antibody test). The titer remained the same 6 months later. This case reaffirms the fact that immunologic suppression may lead to reactivation of Toxoplasma retinitis. Recurrences of Toxoplasma retinochoroiditis are not associated with an increase in antibody titers.