Difference between revisions of "Arcanobacterium pyogenes"
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*Characteristics: | *Characteristics: | ||
**Formerly known as ''Actinomyces pyogenes'' and ''Corynebacterium pyogenes'' | **Formerly known as ''Actinomyces pyogenes'' and ''Corynebacterium pyogenes'' | ||
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**Suppurative infections | **Suppurative infections | ||
**Abscesses especially in liver | **Abscesses especially in liver | ||
− | **Lymphadenitis, [[Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation | + | **Lymphadenitis, [[Bones Inflammatory - Pathology#Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation |
**Pyometra | **Pyometra | ||
**Endometritis | **Endometritis | ||
− | ** | + | **Summer mastitis |
**Ovine foot disease | **Ovine foot disease | ||
− | **[[ | + | **[[Joints Inflammatory - Pathology#In Sheep|Arthritis]] of sheep post-dipping; [[Joints Inflammatory - Pathology#In Pigs|arthritis in pigs]] and [[Joints Inflammatory - Pathology#In Cattle|arthritis in cattle]] |
**Umbilical infections | **Umbilical infections | ||
**[[Respiratory Bacterial Infections - Pathology#Acute exudative pneumonia|Acute exudative pneumonia]] and contributes to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] | **[[Respiratory Bacterial Infections - Pathology#Acute exudative pneumonia|Acute exudative pneumonia]] and contributes to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] | ||
− | **May cause [[ | + | **May cause [[Muscles Inflammatory - Pathology#Abscesses|myositis]] |
− | **Unclassified ''Actinomyces'' species isolated from closed cases of [[Poll Evil and Fistulous Withers|Poll Evil and Fistulous Withers]] | + | **Unclassified ''Actinomyces'' species isolated from closed cases of [[Bursae and Tendons Inflammatory - Pathology#Poll Evil and Fistulous Withers|Poll Evil and Fistulous Withers]] |
*Treatment: | *Treatment: | ||
**Penicillin or broad spectrum antibiotics | **Penicillin or broad spectrum antibiotics | ||
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*Suppurative infections | *Suppurative infections | ||
*Abscesses especially in liver | *Abscesses especially in liver | ||
− | *Lymphadenitis, [[Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation | + | *Lymphadenitis, [[Bones Inflammatory - Pathology#Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation |
*Pyometra | *Pyometra | ||
*Endometritis | *Endometritis | ||
− | * | + | *Summer mastitis |
*Ovine foot disease | *Ovine foot disease | ||
− | *[[ | + | *[[Joints Inflammatory - Pathology#In Sheep|Arthritis]] of sheep post-dipping; [[Joints Inflammatory - Pathology#In Pigs|arthritis in pigs]] and [[Joints Inflammatory - Pathology#In Cattle|arthritis in cattle]] |
*Umbilical infections | *Umbilical infections | ||
*[[Respiratory Bacterial Infections - Pathology#Acute exudative pneumonia|Acute exudative pneumonia]] and contributes to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] | *[[Respiratory Bacterial Infections - Pathology#Acute exudative pneumonia|Acute exudative pneumonia]] and contributes to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] | ||
− | *May cause [[ | + | *May cause [[Muscles Inflammatory - Pathology#Abscesses|myositis]] |
===Treatment=== | ===Treatment=== | ||
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**Commonly contaminate wounds | **Commonly contaminate wounds | ||
− | + | [[Category:Actinomycetes]][[Category:Pig]][[Category:Cattle]] | |
− | + | [[Category:To_Do_-_Bacteria]] | |
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− | [[Category:Actinomycetes]][[Category:Pig | ||
− | [[Category:To_Do_-_Bacteria |
Revision as of 10:09, 1 July 2010
- Characteristics:
- Formerly known as Actinomyces pyogenes and Corynebacterium pyogenes
- Small facultatively anaerobic rod
- Grows slowly on blood agar to produce small, white colonies surrounded by a zone of beta-haemolysis after 48 hours
- Produces hazy haemolysis after 24 hours; pin-point colonies after 48 hours
- Coryneform morphology, like Chinese characters; may be curved with slightly swollen ends
- Found in nasopharyngeal mucosa and genital tract of cattle, sheep, pigs
- Pathogenicity
- Opportunistic infections following injury or viral/mycoplasma infection in ruminants and pigs
- Extracellular toxins including haemolysin, proteases, DNase and neurominidase
- Haemolytic toxin, pyolysin, member of the thiol-activated cytolysins (pore-forming toxins); possibly cytotoxic to phagocytic cells; dermonecrotising activity
- Clinical infections:
- Suppurative infections
- Abscesses especially in liver
- Lymphadenitis, osteomyelitis, peritonitis and neural abscessation
- Pyometra
- Endometritis
- Summer mastitis
- Ovine foot disease
- Arthritis of sheep post-dipping; arthritis in pigs and arthritis in cattle
- Umbilical infections
- Acute exudative pneumonia and contributes to Enzootic pneumonia of calves
- May cause myositis
- Unclassified Actinomyces species isolated from closed cases of Poll Evil and Fistulous Withers
- Treatment:
- Penicillin or broad spectrum antibiotics
Characteristics
- Formerly known as Actinomyces pyogenes and Corynebacterium pyogenes
- Small facultatively anaerobic rod
- Grows slowly on blood agar to produce small, white colonies surrounded by a zone of beta-haemolysis after 48 hours
- Produces hazy haemolysis after 24 hours; pin-point colonies after 48 hours
- Coryneform morphology, like Chinese characters; may be curved with slightly swollen ends
- Found in nasopharyngeal mucosa and genital tract of cattle, sheep, pigs
Pathogenicity
- Opportunistic infections following injury or viral/mycoplasma infection in ruminants and pigs
- Extracellular toxins including haemolysin, proteases, DNase and neurominidase
- Haemolytic toxin, pyolysin, member of the thiol-activated cytolysins (pore-forming toxins); possibly cytotoxic to phagocytic cells; dermonecrotising activity
Clinical infections
- Suppurative infections
- Abscesses especially in liver
- Lymphadenitis, osteomyelitis, peritonitis and neural abscessation
- Pyometra
- Endometritis
- Summer mastitis
- Ovine foot disease
- Arthritis of sheep post-dipping; arthritis in pigs and arthritis in cattle
- Umbilical infections
- Acute exudative pneumonia and contributes to Enzootic pneumonia of calves
- May cause myositis
Treatment
- Penicillin or broad spectrum antibiotics
sheep
- Corynebacterium pyogenes
- May cause post-dipping joint infections
pigs
- Cause purulent arthritis
- In one or more joints
- Commonly contaminate wounds