Bacillus Weihenstephanensis
| Bacillus Weihenstephanensis | ||||||||||||
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| Bacillus Weihenstephanensis | ||||||||||||
| Lechner 1998 |
Bacillus weihenstephanensis is a psychrotolerant species within the Bacillus cereus group. It differs from other psychrotolerant members of the Bacillus cereus group in terms of the DNA sequence of the cold-shock protein cspA . The name comes from the district Weihenstephan , where the bacterium was first isolated. Characteristics of B. weihenstephanensis can be found in numerous Bacillus cereus and Bacillus mycoides strains. Later genomic studies classified B. weihenstephanensis as a heterotypic synonym of Bacillus mycoides .
properties
The species Bacillus weihenstephanensis can be distinguished from the closely related species Bacillus cereus by the growth temperatures. The growth of Bacillus weihenstephanensis takes place at 4 ° C, but no longer at 43 ° C. Bacillus cereus only grows from 10 ° C, but also grows at 43 ° C. The species Bacillus weihenstephanensis can thus be described as psychrotolerant ("cold-accepting"), while Bacillus cereus is mesophilic ("loving moderate temperatures").
The original isolates were obtained from pasteurized milk from southern Germany that was subjected to a storage test at refrigerator temperatures. The occurrence strongly depends on the annual mean temperature . Psychrophilic B. Weihenstephanensis occur in alpine and temperate zones, but not in the tropics. Due to its ability to cause food poisoning , it is classified in biological risk group 2. Thus emetic were Bacillus weihenstephanensis characterized, the cereulide prepared at 8 ° C. However, this is an exception. As a rule, strains of Bacillus weihenstephanensis produce the typical Bacillus cereus enterotoxins Nhe , Hbl or CytK.
Individual evidence
- ↑ Taxonomy of the species Bacillus weihenstephanensis Lechner et al. 1998 . doi : 10.1601 / tx.5007 .
- ↑ a b Sabine Lechner, Ralf Mayr, Kevin P. Francis, Birgit M. Prüß, Thomas Kaplan, Elke Wießner-Gunkel, Gordon SAB Steward, Siegfried Scherer: Bacillus weihenstephanensis sp. nov. is a new psychrotolerant species of the Bacillus cereus group . In: International Journal of Systematic and Evolutionary Microbiology . tape 48 , no. 4 , 1998, ISSN 1466-5026 , pp. 1373-1382 , doi : 10.1099 / 00207713-48-4-1373 .
- ↑ Brahim Soufiane, Jean-Charles Côté: Bacillus weihenstephanensis characteristics are present in Bacillus cereus and Bacillus mycoides strains . In: FEMS Microbiology Letters . tape 341 , no. 2 , 2013, ISSN 0378-1097 , p. 127-137 , doi : 10.1111 / 1574-6968.12106 .
- ↑ Yang Liu, Qiliang Lai, Zongze Shao: Genome analysis-based reclassification of Bacillus weihenstephanensis as a later heterotypic synonym of Bacillus mycoides . In: International Journal of Systematic and Evolutionary Microbiology, . tape 68 , no. 1 , 2018, ISSN 1466-5026 , p. 106-112 , doi : 10.1099 / ijsem.0.002466 .
- ↑ Felix von Stetten, Ralf Mayr, Siegfried Scherer: Climatic influence on mesophilic Bacillus cereus and psychrotolerant Bacillus weihenstephanensis populations in tropical, temperate and alpine soil . In: Environmental Microbiology . tape 1 , no. 6 , December 1999, pp. 503 , doi : 10.1046 / j.1462-2920.1999.t01-1-00070.x .
- ↑ TRBA 466 "Classification of Prokaryotes (Bacteria and Archaea) in Risk Groups"
- ^ Line Thorsen, Bjarne Munk Hansen, Kristian Fog Nielsen, Niels Bohse Hendriksen, Richard Kerry Phipps, Birgitte Bjørn Budde: Characterization of Emetic Bacillus weihenstephanensis , a New Cereulide-Producing Bacterium . In: Applied and Environmental Microbiology . tape 72 , no. 7 , 2006, ISSN 0099-2240 , p. 5118-5121 , doi : 10.1128 / AEM.00170-06 , PMID 16820519 .
- ↑ Lotte P. Stenfors, Ralf Mayr, Siegfried Scherer, Per Einar Granum: Pathogenic potential of fifty Bacillus weihenstephanensis strains . In: FEMS Microbiology Letters . tape 215 , no. 1 , 2002, ISSN 0378-1097 , p. 47-51 , doi : 10.1111 / j.1574-6968.2002.tb11368.x .