Trimethoprim‐Sulfamethoxazole as Toxoplasmosis Prophylaxis for Heart Transplant Recipients

Abstract
Sir—Toxoplasmosis is a disease that is highly transmissible to D+/R- patients (i.e., patients who are seronegative for Toxoplasma gondii IgG antibodies and who receive a heart transplant from donors who are seropositive for T. gondii IgG antibodies). This disease, along with disseminated aspergillosis, is associated with the highest mortality rate attributable to an infectious complication in heart transplant recipients. For these high-risk patients, 25 mg of pyrimethamine is given as toxoplasmosis prophylaxis for 6 weeks after surgery [1–3].