title: Variation in rRNA operon number as revealed by ribotyping of Bacillus anthracis strains.
abstract: Ribotyping of various Bacillus strains with one restriction enzyme (AccI) revealed significant similarity between Bacillus anthracis strains, Bacillus thuringiensis and Bacillus cereus strains, which are all members of the Bacillus cereus group. A further ribotyping study of 10 virulent and 8 attenuated B. anthracis strains, using 4 endonucleases and both 23S and 16S probes independently, was performed. The discrimination index D of Hunter and Gaston showed that the best combination for future large-scale ribotyping studies would be either the combination of AccI and 23S, or that of EcoRI and 16S. Depending on the B. anthracis strain analyzed 10 or 11 rRNA operons were found. In all cases, many strains were grouped into 2 to 3 patterns. Attenuated strains, including a laboratory-cured strain, yielded aberrant patterns.
authors: Laboratoire de Prédéveloppement des Sondes, Institut Pasteur, Paris, France. patrag2@scranton.edu
authors: Guy
authors: G
authors: Patra
authors: Agnès
authors: A
authors: Fouet
authors: Josée
authors: J
authors: Vaissaire
authors: Jean-Luc
authors: JL
authors: Guesdon
authors: Michèle
authors: M
authors: Mock
mesh_terms: D001408:Bacillus anthracis / Q000145:classification* / Q000235:genetics*; D016000:Cluster Analysis; D018628:Gene Dosage; D009876:Operon; D012150:Polymorphism, Restriction Fragment Length; D012335:RNA, Ribosomal / Q000235:genetics*; D021521:Ribotyping
chemical_list: D012335:RNA, Ribosomal