Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Effect of growth promoter diet agents on the frequency of antibiotic resistance levels in 197 E. coli isolates from broiler chickens. The percentage of resistance to most antibiotics decreased significantly (P < 0.001) from day 7 to day 35. Asterisks indicate the antibiotics against which the resistance percentages between treatments were statistically different (P < 0.001).
