Difference between revisions of "Arcanobacterium pyogenes"

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(Created page with '*Characteristics: **Formerly known as ''Actinomyces pyogenes'' and ''Corynebacterium pyogenes'' **Small facultatively anaerobic rod **Grows slowly on blood agar to produce small,…')
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New name: '''''Trueperella 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
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**Lymphadenitis, [[Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation
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**Lymphadenitis, [[Bones Inflammatory - Pathology#Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation
 
**Pyometra
 
**Pyometra
 
**Endometritis
 
**Endometritis
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**[[Summer Mastitis|Summer mastitis]]
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**Summer mastitis
 
**Ovine foot disease
 
**Ovine foot disease
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**[[Infectious Arthritis#In Sheep|Arthritis]] of sheep post-dipping; [[Infectious Arthritis#In Pigs|arthritis in pigs]] and [[Infectious Arthritis#In Cattle|arthritis in cattle]]
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**[[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]]
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**May cause [[:Category:Bacterial Myositis|myositis]]
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**May cause [[Muscles Inflammatory - Pathology#Abscesses|myositis]]
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**Unclassified ''Actinomyces'' species isolated from closed cases of [[Poll Evil and Fistulous Withers|Poll Evil and Fistulous Withers]]
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**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:
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**Penicillin or broad spectrum antibiotics
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**Penicillin or broad spectrum antibiotics[[Category:Actinomyces]][[Category:Pig]][[Category:Cattle]]
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===Characteristics===
 
−
 
 
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*Formerly known as ''Actinomyces pyogenes'' and ''Corynebacterium pyogenes''
 
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*Small facultatively anaerobic rod
 
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*Grows slowly on blood agar to produce small, white colonies surrounded by a zone of beta-haemolysis after 48 hours
 
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*Produces hazy haemolysis after 24 hours; pin-point colonies after 48 hours
 
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*Coryneform morphology, like Chinese characters; may be curved with slightly swollen ends
 
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*Found in nasopharyngeal mucosa and genital tract of cattle, sheep, pigs
 
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−
 
 
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===Pathogenicity===
 
−
 
 
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*Opportunistic infections following injury or viral/mycoplasma infection in ruminants and pigs
 
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*Extracellular toxins including haemolysin, proteases, DNase and neurominidase
 
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*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|osteomyelitis]], peritonitis and neural abscessation
 
−
*Pyometra
 
−
*Endometritis
 
−
*[[Summer Mastitis|Summer mastitis]]
 
−
*Ovine foot disease
 
−
*[[Infectious Arthritis#In Sheep|Arthritis]] of sheep post-dipping; [[Infectious Arthritis#In Pigs|arthritis in pigs]] and [[Infectious Arthritis#In Cattle|arthritis in cattle]]
 
−
*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]]
 
−
*May cause [[:Category:Bacterial Myositis|myositis]]
 
−
 
 
−
===Treatment===
 
−
 
 
−
*Penicillin or broad spectrum antibiotics
 
−
 
 
−
 
 
−
 
 
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==sheep==
 
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*'''''[[Corynebacterium pyogenes]]'''''
 
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**May cause post-dipping joint infections
 
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==pigs==
 
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**Cause purulent arthritis
 
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**In one or more joints
 
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**Commonly contaminate wounds
 
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−
 
 
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==cattle==
 
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*Infections at any age:
 
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**'''''[[Corynebacterium pyogenes]]'''''
 
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***Suppurative arthrtis
 
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***Often due to pebetrating wound into or close to joints
 
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[[Category:Actinomycetes]][[Category:Pig Bacteria]][[Category:Cattle Bacteria]][[Category:Sheep Bacteria]]
 
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[[Category:To_Do_-_Bacteria]][[Category:To Do - Medium]]
 

Revision as of 11:59, 10 May 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:
  • Treatment:
    • Penicillin or broad spectrum antibiotics
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