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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

Main Article

Table 2

Experimental infection studies with Cryptosporidium parvum isolates from various sources

Isolate Experimental host Infection
Maine, 1993 mouse
calf +
+
Wisconsin, 1993 mouse
calf -
-
Georgia (day care), 1995 mouse
calf -
ND
Georgia (water park), 1995 mouse
calf -
-
Florida, 1995 mouse
calf -
ND
Iowa (bovine), 1984 mouse
calf +
+

ND = not done

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