Affiliation: | Parasitology Division, Center for Disease Control, Public Health Service, U.S. Department of Health, Education, and Welfare, Atlanta, Georgia 30333.;Pathology Division, Center for Disease Control, Public Health Service, U.S. Department of Health, Education, and Welfare, Atlanta, Georgia 30333.;Department of Medical Microbiology, School of Public Health, University of California, Berkeley, California.;Microbiology Department, University of Georgia, Athens, Georgia. |