Skin Diseases

Skin Diseases

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Mycobacterium Marinum Infection


Mycobacterium marinum infection follows traumatic inoculation while the exposed skin is in an aqueous environment, whether a fish tank, swimming pool, or brackish water. It is characterized clinically by an inflammatory verrucous or crusted lesion at the inoculation site, and in some cases lymphangitic spread.



Causes:

The cause is infection with M marinum.

* Exposure of traumatized skin to affected aqueous environments (fish tanks) is the leading predisposing factor.
* Individuals who are consistently exposed to the organism are more likely to develop the infection.
* Hosts who are immunocompromised are also at increased risk.


Symptoms:

* Lymphadenopathy may be present.
* An erythematous or bluish 0.5- to 3-cm papule or nodule develops at the inoculation site, which is the upper extremity in 90% of cases.
* Patients may have deeper involvement, with tenosynovitis bursitis, septic arthritis.

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