Volume 18, Number 5—May 2012
Research
Antimicrobial Drug Resistance in Escherichia coli from Humans and Food Animals, United States, 1950–2002
Figure 3

Figure 3. . . Trend analysis of selected antimicrobial agents among Escherichia coli isolates from humans (A) and animals (B), United States, 1950–2002. AMP-R, ampicillin resistance; STR-R, streptomycin resistance; TET-R, tetracycline resistance.