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,…')
 
 
(14 intermediate revisions by 2 users not shown)
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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
**Lymphadenitis, [[Bones Inflammatory - Pathology#Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation
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**Lymphadenitis, [[Osteomyelitis|osteomyelitis]], peritonitis and neural abscessation
 
**Pyometra
 
**Pyometra
 
**Endometritis
 
**Endometritis
**Summer mastitis
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**[[Summer Mastitis|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]]
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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]]
 
**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 [[Muscles Inflammatory - Pathology#Abscesses|myositis]]
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**May cause [[:Category:Bacterial Myositis|myositis]]
**Unclassified ''Actinomyces'' species isolated from closed cases of [[Bursae and Tendons Inflammatory - Pathology#Poll Evil and Fistulous Withers|Poll Evil and Fistulous Withers]]
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**Unclassified ''Actinomyces'' species isolated from closed cases of [[Poll Evil and Fistulous Withers|Poll Evil and Fistulous Withers]]
 
*Treatment:
 
*Treatment:
**Penicillin or broad spectrum antibiotics[[Category:Actinomyces]][[Category:Pig]][[Category:Cattle]]
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**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|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
 +
 
 +
 
 +
 
 +
==sheep==
 +
 
 +
*'''''[[Corynebacterium pyogenes]]'''''
 +
**May cause post-dipping joint infections
 +
 
 +
==pigs==
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 +
**Cause purulent arthritis
 +
**In one or more joints
 +
**Commonly contaminate wounds
 +
 
 +
 
 +
==cattle==
 +
 
 +
*Infections at any age:
 +
**'''''[[Corynebacterium pyogenes]]'''''
 +
***Suppurative arthrtis
 +
***Often due to pebetrating wound into or close to joints
 +
 
 +
[[Category:Actinomycetes]][[Category:Pig Bacteria]][[Category:Cattle Bacteria]][[Category:Sheep Bacteria]]
 +
[[Category:To_Do_-_Bacteria]][[Category:To Do - Medium]]

Latest revision as of 15:34, 24 January 2013

New name: Trueperella pyogenes

  • 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


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


sheep

pigs

    • Cause purulent arthritis
    • In one or more joints
    • Commonly contaminate wounds


cattle

  • Infections at any age: