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. 2002 Jun;68(6):2711–2715. doi: 10.1128/AEM.68.6.2711-2715.2002

FIG. 4.

FIG. 4.

Impact of DOC on L. pneumophila inactivation with 0.4 mg of copper ions per liter (detection limit, 10 CFU/ml). DOC at a level of 20 mg/liter prevented a copper concentration of 0.4 mg/liter from killing L. pneumophila within 24 h.