Bacilli

Bacilli

Bacilli refers to a taxonomic Class (biology) of bacteria. It includes two orders, Bacillales and Lactobacillales, which contain several well-known pathogens such as Bacillus anthracis (the cause of anthrax).

Contents

  • Ambiguity 1
  • Phylogeny 2
    • Bacilli part 2 (continued) 2.1
  • References 3

Ambiguity

Several related concepts make use of similar words, and the ambiguity can create considerable confusion. The term "Bacillus" (capitalized and italicized) is also the name of a genus that, among many other genera, falls within the class Bacilli.

Also, "bacillus" (or the plural "bacilli") can be a generic term to describe the morphology of any rod-shaped bacterium. This general term does not mean that the subject is a member of class Bacilli or genus Bacillus. Thus, it does not necessarily imply a similar group of characteristics. Not all members of class Bacilli are rod-shaped (Staphylococcus is spherical), and many other rod-shaped bacteria that do not fall within that class (Clostridium kamina dalla kotta is rod-shaped but very different taxonomically) exist. Moreover, the general term "bacillus" does not necessarily indicate the Gram-positive staining common to class Bacilli. For example, E. coli is a rod-shaped bacterium that could, therefore, be described as "a bacillus", but it stains Gram-negative and does not belong to genus Bacillus or class Bacilli. Some microbiologists have forsaken the general "bacillus" term because of the confusion it can create.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature:[1] [2] and the phylogeny is based on 16S rRNA-based LTP release 106 by 'The All-Species Living Tree' Project [3]

Bacilli

Alicyclobacillaceae [incl. Bacillus tusciae & Tumebacillus permanentifrigoris]




Calditerricola


Thermoactinomycetaceae





Bacillus schlegelii


Thermicanus aegyptius {Bacillales Family X. Incertae Sedis}




Caldalkalibacillus



Microanaerobacter




Bacillus species group 14


Paenibacillaceae 1




Bacillaceae 4 [incl. Pullulanibacillus naganoensis, Sinobaca qinghaiensis & Tuberibacillus calidus]



Vulcanibacillus



Bacillus species group 13



Bacillus species group 12 [incl. Anaerobacillus]



Bacillus species group 11



Bacillus species group 10




Bacillus taeanensis


Bacillaceae 3




Bacillus species group 9



Bacillus species group 8

Bacilli part 2 (continued)
















Unclassified Bacillales

Notes:
♠ Strains found at the National Center for Biotechnology Information (NCBI) but not listed in the List of Prokaryotic names with Standing in Nomenclature LPSN

Bacilli part 2 (continued)

Bacilli part 2


Bacillus species group 7



Bacillus species group 6




Bacillus species group 5 [incl. Aeribacillus pallidus]



Bacillus coagulans


Sporolactobacillaceae






Bacillus aeolius


Bacillaceae 2




Bacillus smithii



Bacillus badius



Exiguobacterium {Bacillales Family XII. Incertae Sedis}


Paenibacillaceae 2










Bacillus species group 4 [incl. Falsibacillus pallidus]




Bacillus species group 3


Bacillus




Bacillus species group 2




Bacillus species group 1



Jeotgalibacillus



Planococcaceae [incl. Acetobacter pasteurianus ascendens, Lysinibacillus, Psychrobacillus, Viridibacillus & various Bacillus sp.]






Bacillus coahuilensis



Staphylococcaceae




Gemella {Bacillales Family XI. Incertae Sedis}

Aphragmobacteria

Turicibacter sanguinis



Haloplasma contractile



Erysipelotrichaceae [incl. Anaerorhabdus furcosa, Sharpea azabuensis, Streptococcus pleomorphus and various Clostridium, Eubacterium & Lactobacillus sp.]


Mollicutes






Lactobacillales









References

  1. ^ See the  
  2. ^ See the  
  3. ^ See the