Volume 3, Number 4—December 1997

Dispatch

Genetic Polymorphism Among Cryptosporidium parvum Isolates: Evidence of Two Distinct Human Transmission Cycles

Michael M. Peng*, Lihua Xiao†, Amanda R. Freeman†, Michael J. Arrowood†, Ananias A. Escalante†, André C. Weltman‡, Corinne S.L. Ong¶, William R. Mac Kenzie†, Altaf A. Lal†, and Charles B. Beard†

Author affiliations: *The University of Michigan, Ann Arbor, Michigan, USA; †Centers for Disease Control and Prevention, Atlanta, Georgia, USA; ‡Pennsylvania Department of Health, Harrisburg, Pennsylvania, USA; and ¶University of British Columbia, British Columbia, Canada

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Figure 1

Figure 1. Alignment of TRAP-C2 nucleotide positions that show polymorphism among Cryptosporidium parvum isolates from human and nonhuman sources. Published calf sequence refers to Genbank accession number X77586. Other bovine (n=21) refers to 21 samples (from Georgia, Alabama, Ohio, Oklahoma, Kansas, Iowa, Idaho, Utah, and Washington) that had the same genotype.

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