James W. Moulder, Ph. D., is Professor Emeritus of Molecular Genetics and Cell Biology at The University of Chicago. He is presently a Visiting Scientist in the Department of Microbiology and Immunology at The University of Arizona, Tucson. After receiving S.B. and Ph. D. degrees in Biochemistry from The University of Chicago, Professor Moulder joined its faculty in 1944, where he remained, first in Microbiology and later in Molecular Genetics and Cell Biology, until his retirement in 1986. He was Chairman of the Department of Microbiology from 1959 through 1968. Professor Moulder was a Fellow of the John Simon Guggenheim Foundation and a Senior Fulbright Research Fellow in the Department of Biochemistry, University of Oxford, in 1952 to 1953. He received the Eli Lilly Award in Bacteriology in 1954 and was a Burroughs-Welcome Visiting Professor of Microbiology at Western Kentucky University in 1984. Professor Moulder was editor of The Journal of Infectious Diseases from 1957 through 1968. He has been a trustee of the Bergey’s Manual Trust since 1981. He is a member of the American Association for the Advancement of Science, the American Society for Microbiology, and the American Society for Biochemistry and Molecular Biology. He is also an honorary member of the American Society for Rickettsiology and Rickettsial Diseases. Professor Moulder’s chief research interest is the biochemistry of intracellular parasitism, with emphasis on members of the genus Chlamydia. He has written books, book chapters, reviews, and many original articles on this subject.