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Veterinary bacteriology


Species/Subspecies: Erysipelothrix rhusiopathiae
Categories: Zoonotic; causes hemolysis
Etymology: Genus name: erysipelas thread.
Species epithet: of red disease.
Significance:  [Very important]   
Taxonomy:
Phylum
Firmicutes
Class
Erysipelotrichia
Order
Erysipelotrichales
Family
Erysipelothrichaceae 
Genus
Erysipelothrix
Type Strain: ATCC 19414 = CCUG 221 = NCTC 8163.
Macromorphology (smell):
   
Small transparent nonpigmented colonies (0.2-1 mm in diameter) with a narrow zone of α-hemolysis on blood agar.
Micromorphology: Nonmotile and short rods (0.5 x 1.5-3.0 µm) with rounded ends, which may also grow as long filaments (about 60 µm in length).
Gram +/Gram -:
 
G+
Metabolism: Facultatively anaeroic
Catalase/Oxidase:-/-
Other Enzymes: Hippuricase +, tryptophanase -, urease -.
Biochemical Tests: Citrate -, Voges-Proskauer -.
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
+++-(+)
L-arabinosecellobioseD-mannitolsalicintrehalose
-----
glycerolinulinraffinoseD-sorbitolstarch
--+--
Other carbohydrates: ribose -, xylose -.
Spec. Char.:
Disease:
HostsDiseaseClinical picture
PigErysipelas (Diamond skin disease)Acute and subacute form: Sepsis, sudden death, fever, arthritis, diamond shaped skin lesions
Chronic form: arthritis, endocarditis
PoultryErysipelasSepsis, increased herd mortality, decreased egg production and arthritis.
HumansErysipeloidRed rhomboidal patches on the skin, Note that erysipelas in humans is caused by Streptococcus spp.
SheepErysipelasPolyarthritis in lambs, pneumonia, endocarditits
Diagnostics:Culture after enrichment. Confirmation by MALDI-TOF or biochemical tests.
Genome Sequence:
Acc-noStrainSize (bp)Genome
AP012027 Fujisawa 1 787 941 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperonSequence similarity
AB034200 ATCC 19414T 1 497 100% 

Taxonomy/phylogeny:
 
Five species have been described within the genus Erysipelothrix. E. rhusiopathiae can be confused with Erysipelothrix tonsillarum and their 16S rRNA sequences are almost identical (see the phylogenetic tree in Fig. 43:4).
Comment:Type species for the genus. Is zoonotic.
Reference(s): No. 19, 114, 117
Updated:2021-12-02

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The revised taxonomy of the mollicutes

The revised taxonomy of mollicutes (mycoplasmas) has now been introduced on VetBact, which means that many of the species have been given new genus names or moved to another higher taxon. 

Published 2021-11-25. Read more...

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