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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-glucose
?
lactose
?
maltose
+
L-rhamnose
-
sucrose
?
L-arabinose
-
cellobiose
-
D-mannitol
+
salicin
-
trehalose
-
glycerol
-
inulin
-
raffinose
-
D-sorbitol
?
starch
?
Other carbohydrates: Adonitol -, dulcitol -, D-galactose -, inositol -, melezitose -, melibiose -, sorbose -, xylitol -.
Microbiological tests:

  
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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