Veterinary bacteriology: information about important bacteria
|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|
|Type Strain:||IPDH 2403 = ATCC 29545 = NCTC 11296|
||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-|
|Other Enzymes:||Esculinase -, tryptophanase (indole) -, urease -.|
|Biochemical Tests:||Hydrogen sulphide (H2S) -,|
|Fermentation of carbohydrates:||
Other carbohydrates: Adonitol -, dulcitol -, D-galactose -, inositol -, melezitose -, melibiose -, sorbose -, xylitol -.
||Tests for X and V factors are often used in cultivation of Avibacterium paragallinarum.|
|Disease:||Fowl (or infectious) coryza
|Clinical Picture:||Nasal and eye discharge, conjunctivitis, edema of the head, dyspnea, decreased egg production|
|16S rRNA Seq.:|
|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|
|New names of bacterial phyla|
The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.Published 2023-03-01. Read more...
|The taxonomy of chlamydias|
Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBactPublished 2023-03-15. Read more...