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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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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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