QC Strain Minimal Inhibitory Concentration mcg mL Zone Diameter mm Agar Dilution mcg mL Enterococcus faecalis ATCC 29212 Doxycycline 2 to 8 Tetracycline 8 to 32 Escherichia coli ATCC 25922 Doxycycline 0 <a href=http://zithromax.top>azithromycin for uti</a>