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Inactivation curves of copper of four isolates from clinical mastitis: (A) Escherichia coli (Al-563), (B) CNS (MT-163), (C) S. aureus (MT-359), and (D) S. uberis (MT-360). The isolates were exposed to different concentrations of copper. Bacterial counts were analyzed by CFU assay. Each determination was made in triplicate.
