Ulcerative penile Leishmaniasis in a child.

Penile ulcers may be caused by several different agents. Rarely, cutaneous leishmaniasis may also be accompanied by penile ulcers. We report a five-year-old boy with who had an ulcer on the glans penis. Smears from the ulcer demonstrated amastigotes, biopsy showed histopathological features of leishmaniasis and Leishmania was grown in culture. Treatment with meglumine antimoniate injections led to improvement.

Comparative analysis of the tissue inflammatory response in human cutaneous and disseminated leishmaniasis

Cutaneous leishmaniasis (CL) is the most frequent clinical form of tegumentary leishmaniasis and is characterised by a single or a few ulcerated skin lesions that may disseminate into multiple ulcers and papules, which characterise disseminated leishmaniasis (DL). In this study, cells were quantified using immunohistochemistry and haematoxylin and eosin staining (CD4+, CD68+, CD20+, plasma cells and neutrophils) and histopathology was used to determine the level of inflammation in biopsies from patients with early CL, late CL and DL (ulcers and papules). The histopathology showed differences in the epidermis between the papules and ulcers from DL. An analysis of the cells present in the tissues showed similarities between the ulcers from localised CL (LCL) and DL. The papules had fewer CD4+ T cells than the DL ulcers. Although both CD4+ cells and macrophages contribute to inflammation in early CL, macrophages are the primary cell type associated with inflammation intensity in late ulcers. The higher frequency of CD20+ cells and plasma cells in lesions demonstrates the importance of B cells in the pathogenesis of leishmaniasis. The number of neutrophils was the same in all of the analysed groups. A comparison between the ulcers from LCL and DL and the early ulcers and papules shows that few differences between these two clinical forms can be distinguished by observing only the tissue.

Inmunoterapia de la leishmaniasis cutánea: factores que influencian su efectividad / Immunotherapy of cutaneous leishmaniasis: factors that influence their effectiveness

En Venezuela se utiliza la inmunoterapia por su bondad terapéutica y operacional en el tratamiento de la leishmaniasis cutánea y se aprecian diferencias de su efectividad entre los servicios locales de salud que la emplean. En el estado Mérida, donde se tiene un bajo nivel de falla terapéutica, se desconocen los factores de riesgo ó de protección que la determinan. Por ello se planteó realizar un estudio epidemiológico de casos y controles para evaluar los factores individuales demográficos, clínicos, inmunológicos y adherencia terapéutica que influyen en dicha efectividad. El ajuste con regresión logística determinó según definición: a) Demográfica: como riesgo las edades extremas, tabaquismo y de oficio doméstico, con protección en el alfabeto educativamente, b) Clínica: como riesgo la forma intermedia, cinco o más lesiones, infección secundaria y ubicación en pié, con protección en la forma localizada y tamaño menor a 60 mm, c) Inmunológica: de riesgo las bajas respuestas a leishmánina y PPD, d) Adherencia terapéutica: son riesgo la aplicación tópica y aseo local inadecuados. Se concluye, hay factores de riesgo y protección que modelan la eficacia de la inmunoterapia, lo que en consecuencia demanda una dinámica vigilancia clínico-epidemiológica para potenciar dicha terapéutica.

Immunotherapy is used in Venezuela as treatment of cutaneous leishmaniasis and there are differences among the health services that use it. In Merida State there are a low proportion of failures, but the factors that are related to this failure are unknown. A case-control study was planned to evaluate the demographics, clinical, immunological factors and the treatment compliance that can be related to the effectiveness. Logistic regression showed that the factors related to failure were: a) demographics: lower and older ages, smoking, domestic labor and illiteracy; b) clinical: intermediate leishmaniasis, five or more lesions, aggregated infection, lesions in feet, and lesion size above 60 mm; c) Immunology: low reactivity to Montenegro and tuberculin tests; d) treatment compliance: use of incorrect topical substances and inadequate cleaning of ulcer. As a conclusion, there are several factors that influence treatment response, that require clinical and epidemiological surveillance to increase the effect of therapy.

Genus-specific kinetoplast-DNA PCR and parasite culture for the diagnosis of localised cutaneous leishmaniasis: applications for clinical trials under field conditions in Brazil

The positivities of two methods for the diagnosis of localised cutaneous leishmaniasis (CL) were estimated in 280 patients enrolled in a clinical trial. The trial was conducted in an endemic area of Leishmania (Viannia) braziliensis and trial participants were patients with skin ulcers and positive leishmanin skin tests. Patients underwent aspirative skin punctures of the ulcerated lesions and lymph nodes for in vitro cultures, which were processed under field conditions at the local health centre. Skin lesion biopsies were tested at a reference laboratory using kinetoplastid DNA (kDNA)-PCR to detect DNA. The median time required to obtain a positive culture from the skin samples was seven days and the contamination rate of the samples was 1.8 percent. The positivities of the cultures from skin lesions, kDNA-PCR and the combination of the two methods were 78.2 percent (95 percent CI: 73-82.6 percent), 89.3 percent (95 percent CI: 85.1-92.4 percent) and 97.1 percent (95 percent CI: 94.5-98.5 percent). We conclude that parasite culture is a feasible method for the detection of Leishmania in field conditions and that the combination of culture and PCR has a potential role for the diagnosis of CL in candidates for clinical trials.

frequency of old world cutaneous leishmaniasis in skin ulcers in Peshawar

Old World Cutaneous Leishmaniasis [OWCL] is a preventable skin infection that leads to morbidity and social isolation. It is spreading rapidly. The sore of OWCL may be a non-ulcerative red papule, nodule or a large mutilating ulcer. The ulcer is typically painless and can leave a disfiguring scar. This was a descriptive study. The diagnosis of OWCL was established by finding LD bodies in skin smear preparation. This study identified 1680 cutaneous leishmaniasis in 1767 skin ulcers. Children [n=924] were infected more than other age groups [n=756]. There were typical skin sore of OWCL in 1512 cases while 168 patients had a typical presentation. The ulcers were painless in 1603 patients. History of insect bite was present in 1366 cases, thorn prick in 156 patients, religious visit to endemic areas in 256 patients, and 4 patients had post surgical non healing wound. Lesions with 4 to 6 months of age had a maximum yield of LD bodies. There were 498 patients from different areas of Peshawar; 688 cases from leishmania endemic belt of FATA while 89 patients came from other urban and rural areas of NWFP. There is a tremendous increase in cases of OWCL and the disease became endemic in many regions of Pakistan. The bordering areas along Afghanistan have constituted and endemic belt that had invaded the neighboring urban and rural areas. Several chronic non healing ulcers had been diagnosed as OWCL. Many cases have been detected in Peshawar. People need education about the nature of the diseases and the efficacy of personal protective measures. Spray with suitable insecticides is required in all residential areas

Estefanofilariose em humanos: ocorrência e mecanismos de transmissão / Stephanofilariasis in humans: occurrence and transmission mechanisms

Descreve-se aqui o encontro do helminto Stephanofilaria spp., em dermatite nodular ulcerativa em seres humanos, sendo as ulceras pesquisadas de dimensões variadas e com alguns anos de existência. Acredita-se que, a presença desse parasita, que afeta diversas espécies de animais domésticos e silvestres, possa agravar o quadro com as lesões produzidas nos vasos venosos e linfáticos, reduzindo a circulação, retardando a cicatrização. O ciclo deste parasita no ser humano, também é descrito.

This work describes the occurrence of the helminth Stephanofilaria spp in ulcerative nodular dermatitis in humans. The ulcers observed presented a variety of sizes and some years of existence. It is believed that the presence of this parasite, which affects several domestic and wild animal species, may harm human health through lesions produced in venous and lymphatic vessels that reduce blood circulation and retard the healing process. The cycle of this parasite in humans is also described.

Active cutaneous leishmaniasis in Brazil, induced by Leishmania donovani chagasi

Em lesöes cutâneas, de um caso humano e de um cäo, procedente de área endêmica de leishmaniose tegumentar no Rio de Janeiro, foi isolada L.d. chagasi. Ambas as culturas foram identificadas por caracterizaçäo molecular e immunológica do parasito utilizando três diferentes métodos: mobilidade eletroforética de isoenzimas, análise do kDNA e anticorpos monoclonais. Este parece ser o primeiro caso humano bem documentado, no Novo Mundo, de uma Leishmania "viscerotrópica" induzindo lesöes cutâneas e demonstra que o diagnóstico do agente etiológico baseado somente na observaçäo clínica e dados epidemiológicos pode levar a conclusöes errôneas