title: The occurrence of disporous Bacillus thuringiensis cells.
abstract: Ultrathin sections of sporulating Bacillus thuringiensis were examined in a transmission electron microscope. Less than 1% of the about 2,000 approximately sagittal sections of the bacterial cells examined contained two endospores per cell. This finding clarifies the majority of textbook and research reports (which tend to be ambiguous), contradicts several of the most recent textbook reports, and confirms three unillustrated textbook reports, in relation to the occurrence of disporous bacilli. Electron microscopic evidence of the observation is presented, apparently for the first time.
authors.affiliation: Department of Biology, Georgetown University, Washington, DC 20057.
authors.forename: G B
authors.initials: GB
authors.lastname: Chapman
authors.forename: A
authors.initials: A
authors.lastname: Slob-van Herk
authors.forename: J M
authors.initials: JM
authors.lastname: Eguía
mesh_terms: D001413:Bacillus thuringiensis / Q000502:physiology* / Q000648:ultrastructure; D002455:Cell Division / Q000502:physiology; D008854:Microscopy, Electron; D013171:Spores, Bacterial / Q000502:physiology