Volume 18, Number 5—May 2012
Research
Antimicrobial Drug Resistance in Escherichia coli from Humans and Food Animals, United States, 1950–2002
Table 3
Multiple antimicrobial drug resistance among Escherichia coli isolates analyzed by source, United States, 1950–2002
No. drug classes to which isolates are resistant | % Resistant |
||||
---|---|---|---|---|---|
Human, n = 983 | Animal |
Total, n = 1,729 | |||
Cattle, n = 323 | Chickens, n =138 | Pigs, n = 285 | |||
0* | 64.8 | 21.4 | 21.0 | 21.1 | 46 |
1 | 12.4 | 9 | 7.2 | 9.1 | 10.8 |
2 | 7.5 | 10.5 | 16.7 | 16.1 | 10.2 |
3 | 6.5 | 22.6 | 26.8 | 23.9 | 14 |
4 | 4.5 | 15.5 | 14.5 | 13.3 | 8.8 |
5 | 3.8 | 7.7 | 7.2 | 8.4 | 5.5 |
6 | 0.4 | 6.2 | 4.3 | 2.8 | 2.2 |
7 | 0.1 | 5.3 | 2.2 | 5.3 | 2.1 |
8 | 0 | 1.9 | 0 | 0 | 0.3 |
*Susceptible to all drug classes.