“…The first is largely limited to Central and South America, though two cases of disease caused by this organism have occurred in the United States (Moore, Lane, and Gaul, 1954;Bobbitt, Friedman, and Lupton, 1955). The latter is a newly recognized species which was isolated from the lymph nodes, spleen, liver, and colon of a 34-month-old child (Cuttino and McCabe, 1949), and is apparently an obligate intracellular parasite.…”