Cerium occurs naturally in a variety of minerals and is
also generated as a fission product in nuclear reactors. Cerium and cerium compounds are used in
metallurgy, manufacturing, and as chemical catalysts, and have been
evaluated as antibiotics in the treatment of burn wounds (reviewed by Lansdown et al, 2003). Cerium is toxic to many
bacteria, but low concentrations of cerium can stimulate growth in
Escherichia coli (Ruming et al, 2002). Investigators have demonstrated that a variety of bacteria and fungi can bind soluble cerium (Johnson and Kyker, 1960).
For more information:
Medline for cerium AND bacteria
Johnson GT, Kyker GC. Fission-product and cerium uptake by bacteria,
yeasts, and molds. Mycologia 1966;58:91-99.