Cases reported "Leishmaniasis"

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1/3. Characterization of Leishmania colombiensis sp. n (kinetoplastida: Trypanosomatidae), a new parasite infecting humans, animals, and phlebotomine sand flies in colombia and panama.

    Characterization of Leishmania colombiensis sp.n. is presented, which on the basis of biological and molecular criteria, appears to be a new member of the L. braziliensis complex. A total of nine isolates of the new parasite were made in colombia and panama between 1980 and 1986: two from human cases of cutaneous leishmaniasis, six from phlebotomine sand flies, and one from a sloth. Although most closely related to L. lainsoni, L. colombiensis sp.n. is clearly distinguishable from other members of the genus by its reactivity with monoclonal antibodies, isoenzyme electrophoresis, and restriction endonuclease fragment patterns of kinetoplast dna (k-dna).
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2/3. Peripheral neural involvement in cutaneous leishmaniasis. A pathologic study of human and experimental animal lesions.

    Peripheral neural involvement in cutaneous leishmaniasis has recently been recognized. A man presented with several tender hyperesthetic skin nodules. Histopathologic examination confirmed the diagnosis of cutaneous leishmaniasis. Of most interest was the presence of a striking lymphohistocytic inflammatory infiltrate around and within cutaneous nerves in addition to demonstrable leishmania organisms in the perineural space. This observation led to a detailed histopathologic evaluation of leishmanial skin lesions that developed in 13 mice after subcutaneous injection with leishmania major promastigotes. Varying degrees of neural involvement was noted in skin lesions from nine animals. In some lesions, in addition to inflammatory cells in the nerves, organisms were demonstrable within probable schwann cells. Three pathologic stages of dermal neural involvement were identified, namely, an early, intermediate, and late stage, depending on the severity of damage; however no correlation was found between the pathologic stage and the duration of the leismanial skin lesion of a specific animal.
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3/3. Human cutaneous leishmaniasis acquired in texas.

    Four cases of autochthonous human cutaneous leishmaniasis have been identified in south-central texas since 1980. The patients presented with chronic ulcerating papules on the face, earlobe, and lateral thigh. In two patients, the infections healed without treatment. In the other two patients, the lesions healed following treatment with intramuscular sodium stibogluconate or topical antimony potassium tartrate. Serologic testing of family members, using four different techniques, indicates that asymptomatic infections may occur. These are the first reported cases of cutaneous leishmaniasis acquired in texas since 1974. Organisms isolated from patients in 1974 and 1980 belonged to the leishmania mexicana complex when tested by the isoenzyme technique. Although no animal reservoir or insect vector has been identified, six species of sand flies belonging to the genus Lutzomyia do inhibit this part of texas. Accumulated evidence strongly suggests that cutaneous leishmaniasis is endemic in south-central texas.
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