Susceptibility of the Chesapeake Bay to environmental contamination with Cryptosporidium parvum.

*Department of MolecularMicrobiology and Immunology, School of Hygiene and Public Health, Johns Hopkins University, Baltimore, Maryland 21205; {Department of Environmental Health Sciences, School of Hygiene and Public Health, Johns Hopkins University, Baltimore, Maryland 21205; {Immunology and Disease Resistance Laboratory, Agricultural Research Services, Livestock and Poultry Science Institute, U.S. Department of Agriculture, Beltsville, Maryland 20705; and }Cooperative Oxford Laboratory, Center for Coastal Environmental Health and Biomolecular Research, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce, Oxford, Maryland 21654