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    Blastomycosis

    North American blastomycosis; Gilchrist's disease

    Blastomycosis is an infection caused by breathing in the Blastomyces dermatitidis fungus. The fungus is found in wood and soil.


    Causes

    You can get blastomyocosis by contact with moist soil, most commonly where there is rotting wood and leaves. The fungus enters the body through the lungs, where the infection starts. The fungus then spreads to other parts of the body. The disease may affect the skin, bones and joints, and other areas.

    Blastomycosis is rare. It is found in the central and southeastern United States, and in Canada, India, Israel, Saudi Arabia, and Africa.

    The key risk factor for the disease is contact with infected soil. It most often affects people with weakened immune systems, such as those with HIVor who have had an organ transplant. Men are more likely to be affected than women.


    Symptoms

    You may not have any symptoms if the infection remains in the lungs. The following symptoms can develop if the infection spreads to other parts of the body:

    Lung infection may not cause any symptoms. Symptoms may be seen if the infection spreads. Symptoms may include:

    • Bone and joint pain
    • Chest pain
    • Cough (may produce brown or bloody mucus)
    • Fatigue
    • Fever and night sweats
    • General discomfort, uneasiness, or ill feeling (malaise)
    • Muscle pain
    • Unintentional weight loss

    Most people develop skin symptoms when infection spreads. You may get papules, pustules, or nodules on exposed body areas.

    The pustules:

    • May look like warts or ulcers
    • Are usually painless
    • Vary in color from gray to violet
    • May appear in the nose and mouth
    • Bleed easily and form ulcers

    Over time, these skin lesions can lead to scarring and loss of skin color (pigment).

    Exams and Tests

    • Chest CT scan
    • Chest x-ray
    • Skin biopsy
    • Sputum culture and examination
    • Tissue biopsy
    • Urine culture

    Treatment

    You may not need to take medicine for a mildblastomycosis infection that stays in the lungs. Your doctor recommend the following ant-fungal medicines when the disease is severe or spreads outside of the lungs.

    • Fluconazole
    • Itraconazole
    • Ketoconazole

    Amphotericin B may be used for severe infections.

    Follow-up regularly with your doctor to make sure the infection doesn't return.

    Outlook (Prognosis)

    Peoplewith minor skin sores (lesions) and relatively mild lung infections usually recover completely. The infection can lead to death if not treated.

    Possible Complications

    • Large sores with pus (abscesses)
    • Return of the infection (relapse or disease recurrence)
    • Side effects from drugs such as amphotericin B

    When to Contact a Medical Professional

    Call your health care provider if you have symptoms of blastomycosis.

    Prevention

    Avoiding travel to areas where the infection is known to occur may help prevent exposure to the fungus, but this may not always be possible.

    References

    Kauffman CA. Blastomycosis. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 342.

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    • Fungus

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      • Fungus

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      Tests for Blastomycosis

        Review Date: 8/15/2012

        Reviewed By: David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc. Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital.

        The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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