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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Avibacterium paragallinarum
Etymology: Genus name: bakterium from birds.
Species epithet: resembles A. gallinarum (gallinarum: from fowl).
Significance:The disease can cause substantial economical losses
  [Of minor importance]   
Alternative Species Name(s):Haemophilus paragallinarum
Taxonomy:
Phylum
Proteobacteria
Class
Gammaproteobacteria
Order
Pasteurellales
Family
Pasteurellaceae 
Genus
Avibacterium
Type Strain: IPDH 2403 = ATCC 29545 = NCTC 11296
Macromorphology (smell):
 
Small grayish and semi-opaque colonies (0.5-1.0 mm in diameter). The bacterium is mostly cultured on hematin agar.
Micromorphology: Nonmotile coccoid to pleomorphic rod
Gram +/Gram -:G-
Metabolism: Microaerophilic
Catalase/Oxidase:-/-
Other Enzymes: Esculinase -, tryptophanase (indole) -, urease -.
Biochemical Tests: Hydrogen sulphide (H2S) -,
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
??+-?
L-arabinosecellobioseD-mannitolsalicintrehalose
--+--
glycerolinulinraffinoseD-sorbitolstarch
---??
Other carbohydrates: Adonitol -, dulcitol -, D-galactose -, inositol -, melezitose -, melibiose -, sorbose -, xylitol -.
Microbiological tests:
Avibacterium paragallinarum  
Tests for X and V factors are often used in cultivation of Avibacterium paragallinarum.
Spec. Char.:
Disease:Fowl (or infectious) coryza
Hosts: Chickens
Clinical Picture: Nasal and eye discharge, conjunctivitis, edema of the head, dyspnea, decreased egg production
16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AY498868 (T) 1463  

Taxonomy/phylogeny: Five species have been described within genus Avibacterium, which are relatively close to members of the genus Gallibacterium.
Comment:Cultivated with advantage on hematin agar and by the use of X- and V-factor, diagnosis by PCR. Common among non-commercial domestic chickens in Sweden.
Reference(s): No. 57, 67
Updated:2020-03-18

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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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