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Leprosy or Hansen's disease, is a chronic disease caused by the bacterium Mycobacterium leprae. Leprosy is primarily a granulomatous disease of the peripheral nerves and mucosa of the upper respiratory tract; skin lesions are the primary external symptom. Left untreated, leprosy can be progressive, causing permanent damage to the skin, nerves, limbs and eyes. Contrary to popular belief, leprosy does not actually cause body parts to simply fall off Information campaigns about leprosy in high risk areas are crucial so that patients and their families, who were historically ostracized from their communities, are encouraged to come forward and receive treatment. The most effective way of preventing disabilities in leprosy, as well as preventing further transmission of the disease, lies in early diagnosis and treatment with MDT. Leprosy is caused by the organism Mycobacterium leprae. It is not very contagious (difficult to transmit) and has a long incubation period (time before symptoms appear), which makes it difficult to determine where or when the disease was contracted. Children are more susceptible than adults to contracting the disease.Leprosy has two common forms, tuberculoid and lepromatous, and these have been further subdivided. Both forms produce sores on the skin, but the lepromatous form is most severe, producing large, disfiguring nodules (lumps and bumps). Leprosy bacteria attack the nerves in the hands and feet and cause them to become numb. A person may get cuts or burns on the numb parts and not know it, leading to infections which cause permanent damage. Fingers and toes may be lost to infection. Serious infections in the feet may require amputation. Paralysis may cause the fingers and toes to curl up permanently. People with leprosy also may develop sores on the soles of the feet. Damage to the nasal passages can result in a chronically stuffy nose and, if untreated, complete erosion of the nose. Eye damage may lead to blindness. Men with lepromatous leprosy may experience erectile dysfunction (impotence) and become infertile, because the infection can reduce the amount of testosterone This chronic infectious disease usually affects the skin and peripheral nerves but has a wide range of possible clinical manifestations. Patients are classified as having paucibacillary or multibacillary Hansen's disease. Paucibacillary Hansen's disease is milder and characterized by one or more hypopigmented skin macules. Multibacillary Hansen's disease is associated with symmetric skin lesions, nodules, plaques, thickened dermis, and frequent involvement of the nasal mucosa resulting in nasal congestion and epistaxis.
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