Bacillus Invictae Sp. Nov., Isolated From a Health Product

Int J Syst Evol Microbiol. 2014 Nov;64(Pt 11):3867-3876. doi: 10.1099/ijs.0.067850-0. Epub 2014 Aug 29.


A Gram-positive, rod-shaped, endospore-forming Bacillus isolate, Bi.(FFUP1) (T), recovered in Portugal from a health product was subjected to a polyphasic study and compared with the type strains of Bacillus pumilus, Bacillus safensis, Bacillus altitudinis and Bacillus xiamenensis, the phenotypically and genotypically most closely related species. Acid production from cellobiose, D-glucose and D-mannose and absence of acid production from D-arabinose, erythritol, inositol, maltose, mannitol, raffinose, rhamnose, sorbitol, starch and L-tryptophan discriminated this new isolate from the type strains of the most closely related species. Additionally, a significant different protein and carbohydrate signature was evidenced by spectroscopic techniques, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and Fourier transform IR spectroscopy with attenuated total reflectance. Using a chemometric approach, the score plot generated by principal component analysis clearly delineated the isolate as a separate cluster. The quinone system for strain Bi.(FFUP1) (T) comprised predominantly menaquinone MK-7 and major polar lipids were diphosphatidylglycerol, an unidentified phospholipid and an unidentified glycolipid. Strain Bi.(FFUP1) (T) showed ≥ 99% 16S rRNA gene sequence similarity to B. safensis FO-036b(T), B. pumilus (7061(T) and SAFR-032), B. altitudinis 41KF2b(T) and B. xiamenensis HYC-10(T). Differences in strain Bi.FFUP1 (T) gyrB and rpoB sequences in comparison with the most closely related species and DNA-DNA hybridization experiments with Bi.FFUP1 (T) and B. pumilus ATCC 7061(T), B. safensis FO-036b(T), B. altitudinis 41KF2b(T) and B. xiamenensis HYC-10(T) gave relatedness values of 39.6% (reciprocal 38.0%), 49.9% (reciprocal 42.9%), 61.9% (reciprocal 52.2%) and 61.7% (reciprocal 49.2%), respectively, supported the delineation of strain Bi.(FFUP1) (T) as a representative of a novel species of the genus Bacillus, for which the name Bacillus invictae sp. nov. is proposed, with strain Bi.(FFUP1) (T) ( =DSM 26896(T) =CCUG 64113(T)) as the type strain.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacillus / classification*
  • Bacillus / genetics
  • Bacillus / isolation & purification
  • Bacterial Typing Techniques
  • Base Composition
  • DNA, Bacterial / genetics
  • Drug Contamination*
  • Fatty Acids / chemistry
  • Molecular Sequence Data
  • Nucleic Acid Hybridization
  • Phospholipids / chemistry
  • Phylogeny*
  • Portugal
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA
  • Vitamin K 2 / analogs & derivatives
  • Vitamin K 2 / chemistry


  • DNA, Bacterial
  • Fatty Acids
  • Phospholipids
  • RNA, Ribosomal, 16S
  • Vitamin K 2
  • vitamin MK 7

Associated data

  • GENBANK/JX183147
  • GENBANK/JX183163
  • GENBANK/JX183192