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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Brachyspira intermedia
Categories: Causes hemolysis; motile
Etymology: Genus name: short spiral
Species epithet: intermediary (refers to the fact that it seems to be related to both B. hyodysenteriae and B. innocens).
Significance:  [Important]   
Alternative Species Name(s):Serpulina intermedia
Taxonomy:
Phylum
Spirochaetes
Class
Spirochaetia
Order
Spirochaetales
Family
Brachyspiraceae 
Genus
Brachyspira
Type Strain: PWS/A = ATCC 51140.
Macromorphology (smell):
 
Forms small irregular colonies (0.1-1 mm in diameter), which may spred over the agar surface (the bactera "swarm" on the agar plate). Gives a weak hemolysis on blood agar.
Micromorphology:
 
Thin, spiral shaped and motile. Has 24-28 periplasmic flagella (= endoflagella or axial filaments) per cell.
Gram +/Gram -:G- (Uppträder som G-, men har en annan typ av cellvägg).
Metabolism: Anaerobic, but aerotolerant.
Catalase/Oxidase:
Other Enzymes: Tryptophanase +/-, hippuricase -, α-galactosidase -, β-glucosidase +
Fermentation of carbohydrates: D-ribose -
Spec. Char.:
Disease:Intestinal disease in chicken
Hosts: Pig, chicken
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
CP002874 PWS/AT 3 304 788  

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
U23033 PWS/AT 1458 

Taxonomy/phylogeny:
 
Seven species with standing in nomenclature has been described within genus Brachyspira. About 10 additional species have been reported, but their names have not been approved. Some of these species have been included in the phylogenetic trees and their names are given within quotation marks (see Fig. 97:5 and 6). All species within the genus Brachyspira are very closely related, but "B. corvi", B. aalborgi and B. pilosicoli differ significantly from the other species.
Comment:Give production disturbancies in laying hens
Reference(s): No. 18, 64, 69, 92
Link: The Swedish Brachyspira, Leptospira and Treponema Group
Updated:2020-01-23

News

New names of taxa within the classification category phylum

During October 2021, an article was published by A. Oren och G.M. Garrity, in which new names are proposed for a number of taxa within the classification category phylum. This has resulted in many discussions in social media about whether it was really necessary to make these changes, which have created confusion among microbiologists and other professionals who come into contact with bacteriology.

Published 2022-09-28. Read more...

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