In this paper we describe two cases of naturally occurring leishmaniasis in dogs in which Leishmania sp. amastigotes are found within the cytoplasm of fibroblasts. The infected cells were identified histologically, immunohistochemically, and ultrastructurally as fibroblasts. This is the first report of leishmaniasis in any species in which amastigotes were identified in vivo within fibroblasts.
Introducción. La terapia con larvas ha sido ampliamente utilizada para el tratamiento de lesiones ulcerativas de la piel; existen registros de enfermedades, como podopatía diabética, osteomielitis y úlceras varicosas, en las cuales el uso de la terapia con larvas ha promovido la cicatrización de la lesión en presencia de patógenos bacterianos resistentes a los antibióticos convencionales. Objetivo. Realizar una prueba piloto de terapia con larvas de Lucilia sericata sobre lesiones cutáneas producidas por Leishmania amazonensis. Materiales y métodos. En el presente trabajo se empleó un diseño experimental en animales (Mesocricetus aureatus, tres réplicas) con la finalidad de analizar las variaciones del tamaño de la lesión por leishmaniasis antes y después de la terapia con larvas de L. sericata, utilizando criterios para la evaluación de la terapia tales como tamaño de la lesión, tiempo de aplicación y presencia de edema y secreción. Resultados. Indican una cicatrización efectiva y curación de las lesiones localizadas después de la terapia con larvas de L. sericata (80% a 100% de reducción del área de la lesión en 12 horas). Discusión. Los resultados preliminares indican que las larvas de moscas L. sericata son de uso potencial como terapia natural alternativa médica y veterinaria para la leishmaniasis cutánea. Preliminary evaluation of maggot (Diptera: Calliphoridae) therapy as a potential treatment for leishmaniasis ulcersIntroduction. Maggot debridement therapy has been widely used for treating a variety of scarredover soft-tissue wounds. Published accounts record several illnesses in which treatment with larval therapy has promoted injury healing in conjunction with infection by bacterial pathogens resistant to conventional antibiotics.Objective. An initial test of the maggot therapy was developed for cutaneous injuries produced by Leishmania amazonensis. Materials and methods. An experimental design based on an animal model with three replicates in Mesocricetus aureatus (Rodentia: Muridae) was used to evaluate size variation lesion before and after after larval therapy with Lucilia sericata maggots. The criteria used for therapy evaluation were lesion size, maggot application time, and presence or absence of edema and secretions. Results. Effective scarring and wound healing was observed after therapy with L. sericata larvae, i.e. 80% to 100% lesion area reduction after 12 hours. Conclusion. The preliminary results suggest that fly maggots of L. sericata have a potential use as natural medical and veterinary alternative therapy for the cutaneous leishmaniasis.
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