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Appl Environ Microbiol, July 1998, p. 2736-2738, Vol. 64, No. 7
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Giardia sp. Cysts and Infectious Cryptosporidium parvum Oocysts in the Feces of Migratory Canada Geese (Branta canadensis)

Thaddeus K. Graczyk,1,* Ronald Fayer,2 James M. Trout,2 Earl J. Lewis,3 C. Austin Farley,3 Irshad Sulaiman,4 and Altaf A. Lal4

Department of Molecular Microbiology and Immunology, School of Hygiene and Public Health, Johns Hopkins University, Baltimore, Maryland 212051; Immunity and Disease Resistance Laboratory, Livestock and Poultry Science Institute, Agricultural Research Services, U.S. Department of Agriculture, Beltsville, Maryland 207052; Cooperative Oxford Laboratory, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce, Oxford, Maryland 216543; and Department of Parasitic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Chamblee, Georgia 303414

Received 18 March 1998/Accepted 21 April 1998

Fecal droppings of migratory Canada geese, Branta canadensis, collected from nine sites near the Chesapeake Bay (Maryland), were examined for the presence of Cryptosporidium parvum and Giardia spp. Cryptosporidium sp. oocysts were found in feces at seven of nine sites, and Giardia cysts were found at all nine sites. The oocysts from three sites were infectious for mice and molecularly identified as the zoonotic genotype of Cryptosporidium parvum. Waterfowl can disseminate infectious C. parvum oocysts in the environment.

* Corresponding author. Mailing address: Department of Molecular Microbiology and Immunology, School of Hygiene and Public Health, Johns Hopkins University, Baltimore, MD 21205. Phone: (410) 614-4984. Fax: (410) 955-0105. E-mail: tgraczyk{at}jhsph.edu.

Appl Environ Microbiol, July 1998, p. 2736-2738, Vol. 64, No. 7
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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