At its first meeting, the Committee on Emerging Microbial Threats to Health decided to form four task forces to obtain input from the scientific community at large. Each task force (with the exception of Task Force 4) was composed of both committee and noncommittee members and a rapporteur. Task Forces 1 through 3 dealt with specific categories of organisms; Task Force 4 examined policy options that the committee might wish to consider in developing its recommendations. It was later decided to establish a fifth task force to refine the recommendations drafted by the full committee at its third meeting in January 1992. In the lists below, committee members are designated by an asterisk.

Task Force 1 met in Washington, D.C. on May 20-21, 1991, with the following participants:

BARRY R. BLOOM,* Department of Microbiology and Immunology and Howard Hughes Medical Institute, Albert Einstein College of Medicine, Yeshiva University

ROBERT L. BUCHANAN,* Microbial Food Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Eastern Regional Research Center

J. THOMAS GRAYSTON, Department of Epidemiology, University of Washington

GEORGE A. JACOBY, JR., Infectious Disease Unit, Massachusetts General Hospital

GERALD L. MANDELL, (Chair),* Division of Infectious Diseases, Department of Internal Medicine, University of Virginia

WILLIAM A. PETRI, JR. (Rapporteur), Medicine and Microbiology, Divisions of Infectious Diseases and Geographic Medicine, University of Virginia Health Sciences Center

P. FREDERICK SPARLING,* Department of Medicine, University of North Carolina School of Medicine

ANDREW SPIELMAN,* Department of Tropical Public Health, Harvard School of Public Health

DAVID H. WALKER, Department of Pathology, University of Texas Medical Branch

RICHARD P. WENZEL, Department of Clinical Epidemiology, University of Iowa Hospital

Task Force 2 met in Washington, D.C., on May 16-17, 1991, with the following participants:

BRUCE F. ELDRIDGE, University of California Mosquito Research Program, Department of Entomology, University of California at Davis

PATRICIA N. FULTZ,* Department of Microbiology, University of Alabama at Birmingham

DUANE J. GUBLER, Vector-Borne Infectious Diseases Division, National Center for Infectious Diseases, Centers for Disease Control

JAMES L. HARDY, School of Public Health, University of California at Berkeley

FREDERICK G. HAYDEN, Department of Internal Medicine, University of Virginia Hospital

JOHN J. HOLLAND,* Department of Biology and Institute for Molecular Biology, University of California at San Diego

RICHARD T. JOHNSON, Department of Neurology, Microbiology, and Neuroscience, Johns Hopkins University School of Medicine

EDWIN D. KILBOURNE,* Department of Microbiology, Mount Sinai School of Medicine

STEPHEN S. MORSE (Chair),* Rockefeller University

FREDERICK A. MURPHY, School of Veterinary Medicine, University of California at Davis

THOMAS W. SCOTT (Rapporteur), Department of Entomology, University of Maryland at College Park

ALEXIS SHELOKOV,* Salk Institute, Government Services Division

Task Force 3 met in Washington, D.C., on May 8, 1991, with the following participants:

RONALD E. BLANTON (Rapporteur), Division of Geographic Medicine, Department of Medicine, Case Western Reserve University, School of Medicine

CARLOS C. CAMPBELL, Malaria Branch, Parasitic Diseases Division, National Center for Infectious Diseases, Centers for Disease Control

WILLIAM E. DISMUKES, Department of Medicine, Division of Infectious Disease, University of Alabama School of Medicine

ADEL A. F. MAHMOUD (Chair),* Department of Medicine, Case Western Reserve University, University Hospitals of Cleveland

ROSEMARY SOAVE, Division of Infectious Diseases, Cornell Medical Center, New York Hospital

ANDREW SPIELMAN,* Department of Tropical Public Health, Harvard School of Public Health

ROBERT B. TESH, Yale Arbovirus Research Unit, Department of Epidemiology and Public Health, Yale University School of Medicine

Task Force 4 met in Washington, D.C., on May 13-14, 1991, with the following participants:

BARRY R. BLOOM,* Department of Microbiology and Immunology, Howard Hughes Medical Institute, Albert Einstein College of Medicine, Yeshiva University

CIRO A. DE QUADROS, Expanded Programme on Immunization, Pan American Health Organization

WALTER R. DOWDLE, Centers for Disease Control

DEAN T. JAMISON,* Department of Community Health Sciences and Department of Education, University of California at Los Angeles

ADETOKUNBO LUCAS, Department of Population Sciences, Harvard School of Public Health

HARRY M. MEYER, JR., Medical Research Division, American Cyanamid Company

PHILIP K. RUSSELL, (Chair),* School of Hygiene and Public Health, Johns Hopkins University

ROBERT E. SHOPE,* Yale Arbovirus Research Unit, Yale University School of Medicine

Task Force 5 met in Washington, D.C., on February 17, 1992, with the following participants:

JOSHUA LEDERBERG,* Rockefeller University

ADEL A. F. MAHMOUD,* Department of Medicine, Case Western Reserve University, University Hospitals of Cleveland

GERALD L. MANDELL, Division of Infectious Diseases, Department of Internal Medicine, University of Virginia

STEPHEN S. MORSE,* Rockefeller University

PHILIP K. RUSSELL,* School of Hygiene and Public Health, Johns Hopkins University

ROBERT E. SHOPE, (Chair),* Yale Arbovirus Research Unit, Yale University School of Medicine