Difference between revisions of "Staphylococcus spp."

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#REDIRECT[[:Category:Staphylococcus species]]
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<big><center>[[Infectious agents and parasites|'''BACK TO INFECTIOUS AGENTS AND PARASITES''']]</center></big>
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<big><center>[[Bacteria|'''BACK TO BACTERIA''']]</center></big>
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*Gram positive cocci
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* [[General Pathology - Oedema#Permeability type|Permeability types of pulmonary oedema]].
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* Can cause haemorrhagic disease by [[General Pathology - Haemostasis#Secondary Thrombocytopenic Disease|secondary thrombocytopenic disease]].
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*May infect [[Joints - inflammatory#In Sheep|joints of sheep]] or become complication of '''tick-borne fever''', also [[Joints - inflammatory#In Pigs|arthritis in pigs]], [[Joints - inflammatory#In Dogs|dyscospondylitis in dogs]]
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*''Staphylococcus'' spp. in [[Skin - infectious#Impetigo|impetigo]]
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*In [[Skin - infectious#Deep pyoderma|deep pyoderma]], esp. ''S. intermedius''
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==Staphylococcus hyicus==
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*Pigs - '''greasy pig disease'''
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*Exudative epidermitis due to ''Staphylococcus hyicus'' is a worldwide problem in piglets. 
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*The organism can often be isolated from the mucosa and skin of healthy adult pigs, and can persist in the environment for long periods. 
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*Disease occurs only in young piglets up to about 35 days of age. 
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*Passive transfer of antibodies from immune sows and development of immunity with age appear to adequately protect against disease. 
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*Piglets from non-immune sows are predisposed. 
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*Skin trauma, such as due to fighting, allowing entry of infective organisms is also considered a risk factor in this disease.
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===[[Skin - infectious#Greasy pig disease|Pathology]]===
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===Pathogenesis===
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*''Staphylococcus hyicus'' produces an exfoliative toxin of approximately 30 kDa that causes separation of cells in the upper stratum spinosum resulting in rapid intraepidermal spread of organisms. 
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*Death of affected piglets is common and is attributed to dehydration, septicemia, or both. 
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*This porcine disorder has been likened to “scalded skin syndrome” in human neonates, due to skin infection by exfoliative toxin-producing ''Staphylococcus aureus''.
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===Differential diagnosis===
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*mange (Sarcoptes scabiei var. suis)
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*swine parakeratosis (zinc and essential fatty acid deficiency)
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*porcine juvenile pustular psoriasiform dermatitis (collarettes or rings typically on the ventrum of young pigs)
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*dermatosis vegetans (associated with a giant cell pneumonia)
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*dermatophytosis (most commonly Microsporum nanum)
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==Staphylococcus aureus==
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* May cause [[Intestines - disease due to pathogens#Staphylococcus|gastroenteritis]] in small animals.
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*[[Muscles - inflammatory#Botryomycosis|Botryomycosis]] in muscles

Revision as of 11:43, 29 February 2008

BACK TO INFECTIOUS AGENTS AND PARASITES
BACK TO BACTERIA
  • Gram positive cocci


Staphylococcus hyicus

  • Pigs - greasy pig disease
  • Exudative epidermitis due to Staphylococcus hyicus is a worldwide problem in piglets.
  • The organism can often be isolated from the mucosa and skin of healthy adult pigs, and can persist in the environment for long periods.
  • Disease occurs only in young piglets up to about 35 days of age.
  • Passive transfer of antibodies from immune sows and development of immunity with age appear to adequately protect against disease.
  • Piglets from non-immune sows are predisposed.
  • Skin trauma, such as due to fighting, allowing entry of infective organisms is also considered a risk factor in this disease.

Pathology

Pathogenesis

  • Staphylococcus hyicus produces an exfoliative toxin of approximately 30 kDa that causes separation of cells in the upper stratum spinosum resulting in rapid intraepidermal spread of organisms.
  • Death of affected piglets is common and is attributed to dehydration, septicemia, or both.
  • This porcine disorder has been likened to “scalded skin syndrome” in human neonates, due to skin infection by exfoliative toxin-producing Staphylococcus aureus.

Differential diagnosis

  • mange (Sarcoptes scabiei var. suis)
  • swine parakeratosis (zinc and essential fatty acid deficiency)
  • porcine juvenile pustular psoriasiform dermatitis (collarettes or rings typically on the ventrum of young pigs)
  • dermatosis vegetans (associated with a giant cell pneumonia)
  • dermatophytosis (most commonly Microsporum nanum)

Staphylococcus aureus