Department of Tropical Medicine and Public Health, Tulane University New Orleans, La.
Departamento de Parasitologia, Universidad de Chile, Santiago, Chile.
Escuela de Medicina, Universidad Nacionál, Bogotá, Colombia.
The Good Samaritan Hospital, West Palm Beach, Florida.
Jacksonville, Florida
The senior collaborator is indebted to Dr. G. M. Carrera, Assistant Professor in the Departments of Pathology and Tropical Medicine and Public Health, Tulane University, for helpful comments on the interpretation of the findings. Thanks are extended to Eli Lilly and Company, Indianapolis for financial assistance in publication of this report.