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| − | *Gram positive cocci
| + | #REDIRECT[[:Category:Staphylococcus species]] |
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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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| − | ===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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