9:00

Welcome and introduction to session 1  
Wes Long, Ph.D., Food and Drug Administration, Center for Food Safety and Applied Nutrition, Washington, D.C., and Joint Institute for Food Safety and Applied Nutrition, Washington, D.C., and College Park, Md. 

9:20 

The Importance of Dose-Response Modeling to the Public  
William K. Hallman, Department of Human Ecology, Rutgers University, New Brunswick, N.J.

10:25

Introduction to session 2 
Stephen Schaub, Ph.D., U.S. Environmental Protection Agency, Office of Water, Washington, D.C.

10:30

Host Factors Affecting C. parvum Infection  
John Balbus, M.D., Ph.D., George Washington University School of Public Health and Health Services, Center for Risk Science and Public Health and Department of Environmental and Occupational Health, Washington, D.C.

10:55

Genotyping Cryptosporidium  for the identification of infection and contamination sources 
Altaf Lal, Ph.D., Centers for Disease Control and Prevention, Division of Parasitic Diseases, Atlanta, Ga.

11:20

Host-Parasite Interactions  
Honorine Ward, M.B.B.S., Tufts University School of Veterinary Medicine, Division of Infectious Diseases, and New England Medical Center, Division of Geographic Medicine and Infectious Diseases, Boston, Ma.

12:55

Introduction to session 3  
Peg Coleman, M.S., United States Department of Agriculture, Food Safety and Inspection Service, Washington, D.C.

1:05 

Comparison of Cell Culture and Animal Assays for Measuring Infectivity of Cryptosporidiumparvum 
Ricardo De Leon, Ph.D., Metropolitan Water District of Southern California, Water Quality Laboratory, La Verne, Calif.

1:35 

Cell Culture and Animal Models of C. parvum Infection   
Theresa Slifko, University of South Florida, Department of Marine Sciences, Tampa, Fla.

2:05 

BREAK

2:20 

Dosage- and isolate-dependent response of IFNgamma-knockout mice to Cryptosporidium parvuminfection. 
Saul Tzipori, Ph.D., Sc.D., and Stephen Rich, Ph.D., Tufts University School of Veterinary Medicine, Division of Infectious Diseases, N. Grafton, Ma.

2:50 

Cryptosporidium parvum: Infectivity in Healthy Volunteers and Laboratory Animal Models.  
Cynthia Chappell, Ph.D., University of Texas School of Public Health, Center for Infectious Diseases, Houston, Tex.

3:30 

Panel opening risk software modeling demonstration : Peg Coleman 
Panel discussion 
Panel members include Afternoon Session I speakers (Peg Coleman, Ricardo De Leon, Theresa Slifko, Saul Tzipori, and Cynthia Chappell), and panel discussants Jack Colford, M.D., Ph.D.,  University of California Berkeley School of Public Health, Department of Epidemiology, Berkeley, Calif.; Charles Haas, Drexel University, School of Environmental Science, Engineering, and Policy, Philadelphia, Pa.; and Mary Alice Smith, Ph.D., University of Georgia, Department of Environmental Health Sciences, Athens, Ga.

5:10 

Meeting Conclusion