Multiple septation in variants of Bacillus cereus.

Remsen, C. C. (Syracuse University, Syracuse, N.Y.), and D. G. Lundgren. Multiple septation in variants of Bacillus cereus. J. Bacteriol. 90:1426-1431. 1965.-Abnormal nonsporulating cells observed in cultures containing predominantly endospores were examined in an electron microscope. One or more septa were seen which consisted of cell-wall material between two unit membranes. Numerous membrane swirls were often seen associated with the septa. Some of the reported structural features of the variant cells were similar to those published for Bacillus cereus var. alesti and B. subtilis; however, the majority of the cells observed in this work were multiseptated.