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Volume 18, Number 5—May 2012

Research

Antimicrobial Drug Resistance in Escherichia coli from Humans and Food Animals, United States, 1950–2002

Daniel A. Tadesse, Shaohua Zhao, Emily Tong, Sherry Ayers, Aparna Singh, Mary J. Bartholomew, and Patrick F. McDermottComments to Author 
Author affiliations: Food and Drug Administration, Laurel, Maryland, USA (D.A. Tadesse, S. Zhao, E. Tong, S. Ayers, A. Singh, P.F. McDermott); Food and Drug Administration, Rockville, Maryland, USA (M.J. Bartholomew)

Main Article

Table 1

Period of isolation and source of Escherichia coli isolates tested, United States, 1950–2002

Period Source, no. isolates
Human Cattle Chickens Pigs
1950–1959 180 0 0 0
1960–1969 112 17 0 15
1970–1979 292 32 11 25
1980–1989 211 86 65 96
1990–1999 182 108 44 81
2000–2002 6 81 18 68

Main Article

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