[Electron microscopic study of Bacillus stearothermophilus lysis in stab cultivation].

Both vegetative Bacillus stearothermophilus cells 3 and cells with mature spores undergo lysis during submerged cultivation in media with starch and maltose as was shown by light and electron microscopy. This can be caused by enzymes lysing cell wall and synthesized at the beginning of the culture growth. The fine structure of the strain 3 spore has certain peculiarities: it contains no exosporium and the inner envelope has a heterogeneous structure.