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ZnCl2 and NiCl2 toxicity in H. pylori. Cultures of each strain were grown overnight and diluted to OD600 0.1 with metal added to the indicated concentrations. The cultures were then incubated for 20–21 h, followed by determination of OD600 and c.f.u. ml−1. (a) H. pylori SS1 exposed to ZnCl2 (two biological replicates); (b) H. pylori mG27m exposed to ZnCl2 (three biological replicates); (c) H. pylori mG27m exposed to NiCl2 (two biological replicates).
