%0 Journal %T Magnetite in freshwater magnetotactic bacteria %A Frankel, Richard B and Blakemore, Richard P and Wolfe, Ralph S %J Science %V 203 %P 1355--1356 %D 1979 %X A previously undescribed magnetotactic spirillum isolated from a freshwater swamp was mass cultured in the magnetic as well as the nonmagnetic state in chemically defined culture media. Results of Mössbauer spectroscopic analysis applied to whole cells identifies magnetite as a constituent of these magnetic bacteria.