Difference between revisions of "Staphylococcus spp."
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| − | + | *Gram positive cocci | |
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| + | ==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. | ||
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| + | ===Pathology=== | ||
| + | [[Image:f00348.jpg]] | ||
| + | |||
| + | ===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) | ||
Revision as of 14:29, 6 July 2006
- 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)