|Cellular and colonial morphology of Erysipelothrix rhusiopathiae|
Erysipelothrix is a genus of bacteria containing three species. "The hallmark of Erysipelothrix is the presence of a type B cell wall, in which the peptide bridge is formed between amino acids at positions 2 and 4 of adjacent peptide side-chains and not, as in the vast majority of bacteria, between amino acids at positions 3 and 4."
The best known species is Erysipelothrix rhusiopathiae, which causes erysipelas of swine and other animal diseases. The other two species are apparently not pathogenic. Erysipelothrix tonsillarum was described in 1987. Erysipelothrix inopinata was described in 2004. These two species have been isolated from the tonsils of healthy pigs. The new family Erysipelotrichidae was erected to contain this genus.
These bacteria are Gram-positive. They can be mistaken for Gram-negative bacteria during analysis because they lose their staining easily. They are not acid-fast. They are slender, nonmotile rod-shaped bacteria. They are straight or slightly curved and can appear long and filamentous. They exist singly, in V-shaped pairs, or in short chains. They are aerobic to facultatively anaerobic.
- Verbarg, S., et al. (2004). Erysipelothrix inopinata sp. nov., isolated in the course of sterile filtration of vegetable peptone broth, and description of Erysipelotrichaceae fam. nov. IJSEM 54(1) 221-25.
- Takahashi, T., et al. (1987). Erysipelothrix tonsillarum sp. nov. isolated from tonsils of apparently healthy pigs. IJSB 37(2) 166-68.
- Stackebrandt, E., et al. (2006). The Genus Erysipelothrix. Prokaryotes 4 492-510.