Difference between revisions of "Dichelobacter nodosus"
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| − | ''D.nodosus'' is formerly known as ''Bacteroides''. It is a pathogenic, anaerobic, non-spore-forming Gram-negative bacteria. It causes [[Contagious Footrot|footrot]] in sheep, along with other bacteria. | + | {| cellpadding="10" cellspacing="0" border="1" |
| + | | Also known as: | ||
| + | | ''D.nodosus'' | ||
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| + | ''D.nodosus'' is formerly known as ''Bacteroides''. It is a [[Pathogenic anaerobic non-spore-forming Gram-negative species - Overview|pathogenic, anaerobic, non-spore-forming Gram-negative bacteria]]. It causes [[Contagious Footrot|footrot]] in sheep, along with other bacteria. | ||
==Characteristics== | ==Characteristics== | ||
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Thermostable proteases and elastase contribute to the pathogenesis of ''D.nodosus''. Keratinolytic proteases are required for virulence and fimbriae are required for adhesion to hoof. | Thermostable proteases and elastase contribute to the pathogenesis of ''D.nodosus''. Keratinolytic proteases are required for virulence and fimbriae are required for adhesion to hoof. | ||
| − | ''D.nodosus'' is a primary pathogen of epidermal tissues of the hoof of ruminants, | + | ''D.nodosus'' is a primary pathogen of epidermal tissues of the hoof of ruminants, suriving briefly in the envionment. It can be passed from animal to animal. |
==Immunity== | ==Immunity== | ||
| − | A | + | A Homologous antibody to the fimbrial antigen prevents adhesion and protects against ''D.nodosus''. The antibody must penetrate the epidermal layers and reach adequate concentration on the skin surface. A vaccine is available against ''D.nodosus''. Strains can be detected by ELISA and PCR. |
For more information on [[Contagious Footrot]]. | For more information on [[Contagious Footrot]]. | ||
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Revision as of 14:53, 28 July 2010
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This article is still under construction. |
| Also known as: | D.nodosus |
D.nodosus is formerly known as Bacteroides. It is a pathogenic, anaerobic, non-spore-forming Gram-negative bacteria. It causes footrot in sheep, along with other bacteria.
Characteristics
D.nodosus are large rods with terminal swellings. They have long, polar fimbriae. There are 16 antigenic types of fimbriae, which can be used to differentiate strains antigenically. All of the strains possess the same O antigen. Colonies of virulent strains have a dark central zone, a pale granular middle zone and an irregular periphery.
Pathogenesis
Thermostable proteases and elastase contribute to the pathogenesis of D.nodosus. Keratinolytic proteases are required for virulence and fimbriae are required for adhesion to hoof.
D.nodosus is a primary pathogen of epidermal tissues of the hoof of ruminants, suriving briefly in the envionment. It can be passed from animal to animal.
Immunity
A Homologous antibody to the fimbrial antigen prevents adhesion and protects against D.nodosus. The antibody must penetrate the epidermal layers and reach adequate concentration on the skin surface. A vaccine is available against D.nodosus. Strains can be detected by ELISA and PCR.
For more information on Contagious Footrot.