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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Moraxella bovis
Category: Causes hemolysis
Etymology: Genus name: named after the Swiss ophthalmologist V. Morax.
Species epithet: of cattle.
Significance:  [Very important]   
Taxonomy:
Phylum
Proteobacteria
Class
Gammaproteobacteria
Order
Pseudomonadales
Family
Moraxellaceae 
Genus
Moraxella
Type Strain: ATCC 10900 = CCUG 2133 = NCTC 11013.
Macromorphology (smell):
     
Small, dry colonies (1-2 mm in diameter). A hemolyszon is usually produced on blodagar.
Micromorphology: Small nonmotile coccoid rods (1.0-1.5 x 1.5-2.5 µm), which are sometimes approaching the shape of cocci (0.6-1.0 µm in diameter). Appear singly, in pairs or as short chains.
Gram +/Gram -:
   
G-
Metabolism: Aerobic
Catalase/Oxidase:(+)/+
Other Enzymes: DNase -, tryptophanase (indole) -
Fermentation of carbohydrates: Members of the genus Moraxella does not ferment carbohydrates.
Spec. Char.:
Vector: Autumn fly (Musca autumnalis) and other fly species
Disease:
HostsDiseaseClinical picture
CattleInfectious bovine keratoconjunctivitis, pink eyeAffect one (usually) or two eyes. Lacrimal secretion, swelling of the conjunctiva, hyperemia, edema and photosensitivity. After a few days the cornea may be cloudy and circular corneal ulcers can be developed.
Could be a herd problem
Virulence Factors: Q-pili, which give the bacteria adhesion capability to epithelial cells in the cornea. I-pili, which contribute to bacterial survival in the host animal.
Genome Sequence:
Acc-noStrainSize (bp)Genome
Ongoing Epp 63 2 000 000  

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF005183 (T) 1447  

Taxonomy/phylogeny:
 
About 20 species have been described within genus Moraxella and these species are related to members of the genus Acinetobacter.
Updated:2021-09-16

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Published 2021-11-25. Read more...

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