Staphylococcal infection
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| Staphylococcal infection Classification and external resources | |
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| SEM micrograph of S. aureus colonies; note the grape-like clustering common to Staphylococcus species. | |
| MeSH | D013203 |
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Staphylococcus can cause a wide variety of staphylococcal infections in humans and other animals through either toxin production or invasion. Staphylococcal toxins are a common cause of food poisoning, as it can grow in improperly-stored food. One pathogenic species is Staphylococcus aureus, which can infect wounds. These bacteria can survive on dry surfaces, increasing the chance of transmission. S. aureus is also implicated in toxic shock syndrome; during the 1980s some tampons allowed the rapid growth of S. aureus, which released toxins that were absorbed into the bloodstream. Any S. aureus infection can cause the staphylococcal scalded skin syndrome, a cutaneous reaction to exotoxin absorbed into the bloodstream. It can also cause a type of septicaemia called pyaemia. The infection can be life-threatening. Problematically, Methicillin-resistant Staphylococcus aureus (MRSA) has become a major cause of hospital-acquired infections, and is being recognized with increasing frequency in community-acquired infections.
- The coagulase-positive Staphylococcus that inhabits and sometimes infects the skin of domestic dogs and cats is Staphylococcus pseudintermedius. This organism, too, can carry the genetic material that imparts multiple bacterial resistance. It is rarely implicated in infections in humans, as a zoonosis.
- S. epidermidis, a coagulase-negative staphylococcus species, is a commensal of the skin, but can cause severe infections in immune-suppressed patients and those with central venous catheters.
- S. saprophyticus, another coagulase-negative species that is part of the normal vaginal flora, is predominantly implicated in genitourinary tract infections in sexually-active young women.
- In recent years, several other Staphylococcus species have been implicated in human infections, notably S. lugdunensis, S. schleiferi, and S. caprae.
- S. aureus is also one of the most common causes of closed-space infections of the fingertips, known as paronychia.
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Diseases of the skin and subcutaneous tissue (integumentary system) (L, 680-709) | |||||||||||
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| Infections | Staphylococcus (Staphylococcal scalded skin syndrome, Impetigo, Boil, Carbuncle) - Cellulitis (Paronychia) - Acute lymphadenitis - Pilonidal cyst - Corynebacterium (Erythrasma) - Pimple (Pustule) | ||||||||||
| Bullous disorders | acantholysis (Pemphigus, Transient acantholytic dermatosis) - Pemphigoid (Bullous, Mucous membrane, Gestational) - Dermatitis herpetiformis | ||||||||||
| Inflammatory |
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| Radiation-related disorders | Sunburn - Actinic keratosis - Polymorphous light eruption - Radiodermatitis - Erythema ab igne | ||||||||||
| Pigmentation disorder | hypopigmentation (Albinism, Vitiligo) - hyperpigmentation (Melasma, Freckle, Café au lait spot, Lentigo/Liver spot, Acanthosis nigricans) | ||||||||||
| Other | keratosis/hyperkeratosis (Seborrheic keratosis, Callus) - other epidermal thickening (Ichthyosis acquisita, Palmoplantar keratoderma)
skin ulcer (Pyoderma gangrenosum, Bedsore) atrophic (Lichen sclerosus, Acrodermatitis chronica atrophicans) necrobiosis (Granuloma annulare, Necrobiosis lipoidica) - other granuloma (Granuloma faciale, Pyogenic granuloma) vasculitis (Livedoid vasculitis, Erythema elevatum diutinum) Keloid - Systemic lupus erythematosus - Morphea - Calcinosis cutis - Sclerodactyly - Ainhum | ||||||||||
| Disorders of skin appendages |
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| see also congenital, neoplasia | |||||||||||
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
