Inhibition of intracellular growth of T. gondii, viability of M. leprae, and Nitrite production in mouse, human and armadillo ṂΦ. MΦ were unstimulated (Control) or activated for 24 h with the appropriate rIFNγ + 5 ng/ml LPS (ACT) prior to challenge with T. gondii or M. leprae. Growth of T. gondii indexed by enumerated intracellular rosettes, and viability of M. leprae indexed with radiorespirometry of 14C-palmitate. Nitrites were assessed on supernatants using the Griess reagent system. Results are representative of three independent experiments in mouse, 8 different human donors, and 4 different armadillos.