 (A) *Pseudomonas aeruginosa* and (B) *Streptococcus pyogenes* were grown in 00-well microplates with medium containing gallium nitrate at concentrations ranging from 0 to 00 *μ*M. The plates were incubated at 00°C for 00 h without agitation. The turbidity of the medium was directly proportional to the growth of the bacteria, which was measured by a microtiter plate reader at 000 nm absorbance.](ETM-00-00-0000-g00){#f0-etm-00-00-0000}  ![Micro