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1.
J Infect Dis ; 225(1): 163-171, 2022 01 05.
Artigo em Inglês | MEDLINE | ID: mdl-34139757

RESUMO

BACKGROUND: Emerging evidence suggests that the interleukin (IL) 17/ IL-23 axis may play a role in the pathogenesis of leishmaniasis. Our aim was to investigate whether the IL-23R variant rs11805303 is a risk factor for the development of cutaneous leishmaniasis (CL) in Leishmania guyanensis-infected individuals. METHODS: We genotyped by polymerase chain reaction-restriction fragment length polymorphism the rs11805303 C/T in 828 patients with CL and 806 healthy individuals. Plasma tumor necrosis factor-α, IL-6, interferon-γ, IL-1ß, and IL-17 were measured with the Bioplex assay. RESULTS: The distribution of the genotypes differed between patients with CL and healthy controls with a common odds ratio of 1.78 (P = 2.2 × 10-11) for the disease-associated T allele. Leishmania guyanensis-infected individuals homozygous for the T allele show a 200% increased risk of progressing to disease development, with a 95% confidence interval ranging from 81% to 400% (P = 9.9 × 10-6) in comparison to individuals homozygous for the C allele. Males homozygous for the T allele have higher plasma levels of IL-17 compared with heterozygous or homozygous CC individuals. CONCLUSIONS: The present association of the IL-23R variant rs11805303 with the development of CL suggests that the IL-17/IL-23 axis may play an important role in the pathogenesis of CL.


Assuntos
Interleucina-17/sangue , Interleucina-23/genética , Leishmania guyanensis/genética , Leishmaniose Cutânea/diagnóstico , Estudos de Casos e Controles , Humanos , Interleucina-23/sangue , Leishmania guyanensis/isolamento & purificação , Leishmaniose Cutânea/genética , Polimorfismo de Fragmento de Restrição , Polimorfismo de Nucleotídeo Único , Receptores de Interleucina
2.
Hist Cienc Saude Manguinhos ; 27(3): 741-761, 2020.
Artigo em Português, Inglês | MEDLINE | ID: mdl-33111787

RESUMO

The history of the emergence of American cutaneous leishmaniasis in the Brazilian state of Amazonas since the 1970s is analyzed as an object of knowledge and a medical and public health challenge. An overview of the period is provided, including the public health measures and scientific studies undertaken in the context of the execution of large-scale regional developments pursued in the name of national integration by the federal government. The methodology uses documental analysis of laws, the scientific literature, research reports, epidemiological bulletins, and newspapers. The results show that American cutaneous leishmaniasis emerged as a major health problem in Amazonas in close association with the political, economic, and socioenvironmental changes seen in the period.


O artigo faz análise histórica da emergência da leishmaniose tegumentar americana como objeto do conhecimento e desafio médico-sanitário no Amazonas desde a década de 1970. Fornece visão geral dessa época, as medidas sanitárias e os estudos científicos realizados no contexto de implantação dos principais projetos de desenvolvimento regionais executados em nome da política de integração nacional do governo federal. Utiliza como metodologia a análise documental de leis, produção científica, relatórios de pesquisa, boletins epidemiológicos e jornais. Os resultados da pesquisa mostram que a doença surgiu no Amazonas associando o grande problema de saúde com mudanças político-econômicas e alterações socioambientais.


Assuntos
Conservação dos Recursos Naturais , Leishmania/isolamento & purificação , Leishmaniose Cutânea/história , Saúde Pública/história , Animais , Brasil/epidemiologia , História do Século XX , Humanos , Desenvolvimento Industrial/história , Controle de Insetos/história , Insetos Vetores , Leishmania braziliensis/isolamento & purificação , Leishmania guyanensis/isolamento & purificação , Leishmaniose Cutânea/epidemiologia , Leishmaniose Cutânea/transmissão , Psychodidae/parasitologia , Urbanização/história
3.
Hist. ciênc. saúde-Manguinhos ; 27(3): 741-761, set. 2020. tab, graf
Artigo em Português | LILACS | ID: biblio-1134073

RESUMO

Resumo O artigo faz análise histórica da emergência da leishmaniose tegumentar americana como objeto do conhecimento e desafio médico-sanitário no Amazonas desde a década de 1970. Fornece visão geral dessa época, as medidas sanitárias e os estudos científicos realizados no contexto de implantação dos principais projetos de desenvolvimento regionais executados em nome da política de integração nacional do governo federal. Utiliza como metodologia a análise documental de leis, produção científica, relatórios de pesquisa, boletins epidemiológicos e jornais. Os resultados da pesquisa mostram que a doença surgiu no Amazonas associando o grande problema de saúde com mudanças político-econômicas e alterações socioambientais.


Abstract The history of the emergence of American cutaneous leishmaniasis in the Brazilian state of Amazonas since the 1970s is analyzed as an object of knowledge and a medical and public health challenge. An overview of the period is provided, including the public health measures and scientific studies undertaken in the context of the execution of large-scale regional developments pursued in the name of national integration by the federal government. The methodology uses documental analysis of laws, the scientific literature, research reports, epidemiological bulletins, and newspapers. The results show that American cutaneous leishmaniasis emerged as a major health problem in Amazonas in close association with the political, economic, and socioenvironmental changes seen in the period.


Assuntos
Humanos , Animais , Saúde Pública/história , Leishmaniose Cutânea/história , Conservação dos Recursos Naturais , Leishmania/isolamento & purificação , Psychodidae/parasitologia , Urbanização/história , Leishmania braziliensis/isolamento & purificação , Brasil/epidemiologia , Controle de Insetos/história , Leishmaniose Cutânea/transmissão , Leishmaniose Cutânea/epidemiologia , Leishmania guyanensis/isolamento & purificação , Desenvolvimento Industrial/história , Insetos Vetores
4.
Rev Peru Med Exp Salud Publica ; 37(1): 87-92, 2020.
Artigo em Espanhol, Inglês | MEDLINE | ID: mdl-32520199

RESUMO

In Peru, leishmaniasis is a metaxenic disease that represents a serious public health problem, due to its wide distribution and the number of people in danger of contracting the disease, being the vulnerable population mainly those with low economic resources. The study was conducted from patients who were derived to Peru's National Institute of Health between 2006 and 2011 so that the specialized diagnosis could be carried out. The identification of the species of infectious Leishmania was developed through the analysis of the High-Resolution Melting Analysis obtained from the genomic DNA of promastigotes and amastigotes, which allows to identify the species of Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana as more prevalent, in addition to Leishmania (V.) lainsoni and Leishmania (L.) amazonensis.


En el Perú, la leishmaniasis es una enfermedad metaxénica que representa un serio problema de salud pública, debido a su amplia distribución y al número de personas en riesgo de contraer la enfermedad, siendo la población vulnerable principalmente las personas de bajos recursos económicos. El estudio se realizó a partir de pacientes que fueron derivados al Instituto Nacional de Salud entre el 2006 y el 2011 para que se les realizara el diagnóstico especializado. La identificación de la especie de Leishmania infectante se desarrolló mediante el análisis de las curvas de disociación (HRMA) obtenidas a partir del ADN genómico de promastigotes y amastigotes, lo que permitió identificar las especies de Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana como las más prevalentes, además de Leishmania (V.) lainsoni y Leishmania (L.) amazonensis.


Assuntos
Leishmania , Leishmaniose , Humanos , Leishmania/genética , Leishmania/isolamento & purificação , Leishmania braziliensis/genética , Leishmania braziliensis/isolamento & purificação , Leishmania guyanensis/genética , Leishmania guyanensis/isolamento & purificação , Leishmaniose/epidemiologia , Leishmaniose/parasitologia , Leishmaniose/terapia , Peru/epidemiologia
5.
Am J Trop Med Hyg ; 103(2): 752-755, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32524951

RESUMO

An 88-year-old man with mutilating mucosal leishmaniasis (ML) involving septal perforation, with granulomas in the pharynx and larynx, was treated with oral miltefosine, 50 mg three times/day for 28 days. Miltefosine, an antineoplastic agent, is considered an alternative option for the treatment of ML, showing efficacies of 75-92% in Bolivia, Brazil, and Argentina. The patient denied having previous cutaneous (CL) leishmaniasis, and no CL lesions were recognized by physical examination. Parasites obtained from mucosal lesions were identified by cytochrome b gene sequencing as Leishmania guyanensis. Clinical cure was observed 2 months posttreatment, and no evidence of reactivation was observed in the 3-year follow-up. Adverse effects such as nausea, loss of appetite, and epigastric pain were experienced during treatment with miltefosine. There is a need for improved access to miltefosine in leishmaniasis-endemic areas of Latin America and a greater awareness of ML and its treatment among physicians working in endemic countries.


Assuntos
Antiprotozoários/uso terapêutico , Leishmaniose Mucocutânea/tratamento farmacológico , Doenças Nasais/tratamento farmacológico , Doenças Faríngeas/tratamento farmacológico , Fosforilcolina/análogos & derivados , Idoso de 80 Anos ou mais , Citocromos b/genética , Disfonia/etiologia , Humanos , Leishmania guyanensis/genética , Leishmania guyanensis/isolamento & purificação , Masculino , Perfuração do Septo Nasal/etiologia , Doenças Nasais/complicações , Doenças Nasais/patologia , Doenças Faríngeas/complicações , Doenças Faríngeas/patologia , Fosforilcolina/uso terapêutico , Índice de Gravidade de Doença
6.
Am J Trop Med Hyg ; 103(3): 1081-1084, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32314693

RESUMO

We present two cases of Leishmania (V) panamensis in returning travelers from Central America successfully treated with miltefosine. The couple presented with ulcerative skin lesions nonresponsive to antibiotics. Skin biopsy with polymerase chain reaction (PCR) revealed L. (V) panamensis. To prevent the development of mucosal disease and avoid the inconvenience of parental therapy, we treated both patients with oral miltefosine. We suggest that miltefosine represents an important therapeutic alternative in the treatment of cutaneous lesions caused by L. panamensis and in preventing mucosal involvement.


Assuntos
Antiprotozoários/administração & dosagem , Leishmania guyanensis/isolamento & purificação , Leishmaniose Cutânea/diagnóstico , Fosforilcolina/análogos & derivados , Administração Oral , Adulto , Biópsia , América Central , Feminino , Humanos , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Cutânea/parasitologia , Masculino , Fosforilcolina/administração & dosagem , Reação em Cadeia da Polimerase , Pele/parasitologia , Viagem
8.
Rev. peru. med. exp. salud publica ; 37(1): 87-92, ene.-mar. 2020. tab, graf
Artigo em Espanhol | LILACS | ID: biblio-1101806

RESUMO

RESUMEN En el Perú, la leishmaniasis es una enfermedad metaxénica que representa un serio problema de salud pública, debido a su amplia distribución y al número de personas en riesgo de contraer la enfermedad, siendo la población vulnerable principalmente las personas de bajos recursos económicos. El estudio se realizó a partir de pacientes que fueron derivados al Instituto Nacional de Salud entre el 2006 y el 2011 para que se les realizara el diagnóstico especializado. La identificación de la especie de Leishmania infectante se desarrolló mediante el análisis de las curvas de disociación (HRMA) obtenidas a partir del ADN genómico de promastigotes y amastigotes, lo que permitió identificar las especies de Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana como las más prevalentes, además de Leishmania (V.) lainsoni y Leishmania (L.) amazonensis.


ABSTRACT In Peru, leishmaniasis is a metaxenic disease that represents a serious public health problem, due to its wide distribution and the number of people in danger of contracting the disease, being the vulnerable population mainly those with low economic resources. The study was conducted from patients who were derived to Peru's National Institute of Health between 2006 and 2011 so that the specialized diagnosis could be carried out. The identification of the species of infectious Leishmania was developed through the analysis of the High-Resolution Melting Analysis obtained from the genomic DNA of promastigotes and amastigotes, which allows to identify the species of Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana as more prevalent, in addition to Leishmania (V.) lainsoni and Leishmania (L.) amazonensis.


Assuntos
Humanos , Leishmaniose , Leishmania , Peru/epidemiologia , Leishmania braziliensis/isolamento & purificação , Leishmania braziliensis/genética , Leishmaniose/parasitologia , Leishmaniose/terapia , Leishmaniose/epidemiologia , Leishmania guyanensis/isolamento & purificação , Leishmania guyanensis/genética , Leishmania/isolamento & purificação , Leishmania/genética
9.
Epidemiol Serv Saude ; 29(1): e2018504, 2020.
Artigo em Inglês, Português | MEDLINE | ID: mdl-32074196

RESUMO

OBJECTIVE: to investigate Leishmania species in a series of autochthonous cutaneous leishmaniasis (CL) cases in Amapá State, Brazilian Amazon. METHODS: this was a descriptive ecological study carried out from January-October/2018 at a reference center for CL diagnosis in Amapá; individuals with CL receiving care from January-May/2018 were recruited; clinical data and skin biopsies were obtained; from extracted DNA (phenol-chloroform) we amplified the hsp70-234 gene region (PCR) for nucleotide sequencing (Applied Biosystems: ABI3500XL). RESULTS: 38 individuals were interviewed, examined and diagnosed; men predominated (28/38; mean age=32.5±11.3); lesions (most ulcers: 37/38) measuring 0,4-10mm (34/38) and ≥11mm (4/38) were multiple in 20/38 individuals; diagnosis of L. braziliensis (1), L. naiffi (1), L. infantum (1), L. (Viannia) sp. (1), L. amazonensis (2) and L. guyanensis (32); individuals infected with L. guyanensis (32/38) lived in 9/10 municipalities represented in the sample, and 17/32 of these had multiple lesions. CONCLUSION: presence of Leishmania guyanensis predominated and was frequently associated with multiple lesions.


Assuntos
Leishmania guyanensis/isolamento & purificação , Leishmania/isolamento & purificação , Leishmaniose Cutânea/epidemiologia , Leishmaniose Mucocutânea/epidemiologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Brasil/epidemiologia , Feminino , Humanos , Leishmaniose Cutânea/diagnóstico , Leishmaniose Cutânea/parasitologia , Leishmaniose Mucocutânea/diagnóstico , Leishmaniose Mucocutânea/parasitologia , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Vigilância da População , Distribuição por Sexo , Adulto Jovem
10.
Genes (Basel) ; 10(11)2019 10 24.
Artigo em Inglês | MEDLINE | ID: mdl-31652919

RESUMO

Due to the absence of transcriptional regulation of gene expression in Leishmania parasites, it is now well accepted that several forms of genomic variations modulate the levels of critical proteins through changes in gene dosage. We previously observed many of these variations in our reference laboratory strain of L. panamensis (PSC-1 strain), including chromosomes with an increased somy and the presence of a putative linear minichromosome derived from chromosome 34. Here, we compared the previously described genomic variations with those occurring after exposure of this strain to increasing concentrations of trivalent antimony (SbIII), as well as those present in two geographically unrelated clinical isolates of L. panamensis. We observed changes in the somy of several chromosomes, amplifications of several chromosomal regions, and copy number variations in gene arrays after exposure to SbIII. Occurrence of amplifications potentially beneficial for the Sb-resistant phenotype appears to be associated with the loss of other forms of amplification, such as the linear minichromosome. In contrast, we found no evidence of changes in somy or amplification of relatively large chromosomal regions in the clinical isolates. In these isolates, the predominant amplifications appear to be those that generate genes arrays; however, in many cases, the amplified arrays have a notably higher number of copies than those from the untreated and Sb-treated laboratory samples.


Assuntos
Adaptação Fisiológica/genética , Resistência a Medicamentos/genética , Leishmania guyanensis/genética , Polimorfismo Genético , Antimônio/toxicidade , Ecossistema , Genoma de Protozoário , Leishmania guyanensis/efeitos dos fármacos , Leishmania guyanensis/isolamento & purificação
11.
Biomedica ; 39(Supl. 2): 58-65, 2019 08 01.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-31529834

RESUMO

INTRODUCTION: Mucosal leishmaniasis has a progressive course and can cause deformity and even mutilation in the affected areas. It is endemic in the American continent and it is mainly caused by Leishmania (Viannia) braziliensis. OBJECTIVE: To describe a series of mucosal leishmaniasis cases and the infectious Leishmania species. MATERIALS AND METHODS: We included 50 patients with a clinical diagnosis of mucosal leishmaniasis and parasitological confirmation, and we described their clinical and laboratory results. We performed species typing by PCR-RFLP using the miniexon sequence and hsp70 genes; confirmation was done by sequencing. RESULTS: The median time of disease evolution was 2.9 years (range: 1 month to 16 years). The relevant clinical findings included mucosal infiltration (94%), cutaneous leishmaniasis scar (74%), total loss of the nasal septum (24%), nasal deformity (22%), and mucosal ulceration (38%). The symptoms reported included nasal obstruction (90%), epistaxis (72%), rhinorrhea (72%), dysphonia (28%), dysphagia (18%), and nasal pruritus (34%). The histopathological study revealed a pattern compatible with leishmaniasis in 86% of the biopsies, and amastigotes were identified in 14% of them. The Montenegro skin test was positive in 86% of patients, immunofluorescence in 84%, and culture in 8%. Leishmania (V.) braziliensis was identified in 88% of the samples, L. (V) panamensis in 8%, and L. (V.) guyanensis and L. (L.) amazonensis in 2% respectively. CONCLUSION: In this study, we found a severe nasal disease with destruction and deformity of the nasal septum in 25% of the cases, probably associated with late diagnosis. Leishmania (V.) braziliensis was the predominant species. We described a case of mucosal leishmaniasis in Colombia caused by L. (L.) amazonensis for the first time.


Introducción. La leishmaniasis mucosa tiene un curso progresivo y puede causar deformidad e incluso mutilación de las zonas afectadas. Es endémica en el continente americano y es causada principalmente por Leishmania (Viannia) brasiliensis. Objetivo. Describir una serie de casos de leishmaniasis mucosa y las especies de Leishmania infecciosas. Materiales y métodos. Se estudiaron 50 pacientes con diagnóstico clínico de leishmaniasis mucosa y confirmación parasitológica. Se describieron sus características clínicas y los resultados de laboratorio. La tipificación de especies se hizo mediante reacción en cadena de la polimerasa de los polimorfismos de la longitud de los fragmentos de restricción (Restriction Fragment Length Polymorphism Polymerase Chain Reaction, PCR-RFLP) en la secuencia del miniexon y el gen hsp70 y se confirmó por secuenciación. Resultados. La evolución de la enfermedad fue de un mes a dieciséis años (mediana de 2,8 años). Los hallazgos clínicos fueron los siguientes: infiltración mucosa (94 %), cicatriz de leishmaniasis cutánea (74 %), pérdida total del tabique nasal (24 %), deformidad nasal (22 %) y ulceración (38 %). Los síntomas reportados fueron: obstrucción nasal (90 %), epistaxis (72 %), rinorrea (72 %), disfonía (28 %), disfagia (18 %) y prurito nasal (34 %). La histopatología mostró un patrón compatible con leishmaniasis en 86 % de las biopsias y se identificaron amastigotes en 14 % de ellas. La prueba de Montenegro fue positiva en 86 % de los pacientes, la inmunofluorescencia en 84 %, y el cultivo en 8 %. Leishmania (V.) brasiliensis se identificó en 88 % de las muestras, L. (V) panamensis en 8 %, y L. (V.) guyanensis y L. (L.) amazonensis en 2 %, respectivamente. Conclusión. Se encontró enfermedad nasal grave con destrucción y deformidad del tabique nasal en una cuarta parte de los casos, probablemente debido a un diagnóstico tardío. Leishmania (V.) brasiliensis fue la especie predominante. Se describe por primera vez un caso de leishmaniasis mucosa causado por L. (L.) amazonensis en Colombia.


Assuntos
Leishmania braziliensis/isolamento & purificação , Leishmania guyanensis/isolamento & purificação , Leishmaniose Mucocutânea/parasitologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Colômbia/epidemiologia , DNA de Protozoário/genética , Feminino , Genes de Protozoários , Proteínas de Choque Térmico HSP70/genética , Humanos , Leishmania braziliensis/classificação , Leishmania braziliensis/genética , Leishmania guyanensis/classificação , Leishmania guyanensis/genética , Leishmaniose Mucocutânea/complicações , Leishmaniose Mucocutânea/epidemiologia , Leishmaniose Mucocutânea/patologia , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Polimorfismo de Fragmento de Restrição , Proteínas de Protozoários/genética , Análise de Sequência de DNA , Pele/parasitologia , Especificidade da Espécie , Adulto Jovem
12.
Int J Dermatol ; 58(11): 1323-1328, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31524286

RESUMO

BACKGROUND: American cutaneous leishmaniasis (ACL) is endemic in French Guiana. Its epidemiology is evolving, notably because of immigration, anthropization of natural areas, and new microbiological methods. Our first objective was to update epidemiological data. Our second objective was to look for risk factors of ACL. METHODS: This multicentric study was conducted from October 2017 to June 2018 in French Guiana. Patients with suspicion of mucocutaneous leishmaniasis were included in case of positive smear, culture, or PCR-RFLP on skin biopsy. RESULTS: One hundred and twenty-three patients met the inclusion criteria. Among those patients, 59.3% were Brazilian, mostly gold miners. Most of them (58%) were between 16 and 40 years old, and 69% were male. A large proportion of patients lived in traditional wooden houses (51%). Patients living in coastal towns were usually infected during trips to the primary forest (60%) and had a shorter time to diagnosis than workers of the hinterland. Among environmental risk factors, the presence of a water spring (40%) and dogs around houses (40%) were frequently reported. Leishmania guyanensis represented 80% of cases, followed by Leishmania braziliensis (6%), Leishmania naiffi (2%), and Leishmania amazonensis (1%). CONCLUSIONS: Gold mining and trips to the primary forest represent high-risk situations for ACL in French Guiana, where the population of infected patients is dominated by Brazilian immigrants. Possible environmental risk factors such as the presence of dogs, water sources, and traditional wooden houses require further investigation.


Assuntos
Doenças Endêmicas , Leishmaniose Cutânea/epidemiologia , Pele/parasitologia , Adolescente , Adulto , Idoso , Biópsia , Exposição Ambiental/efeitos adversos , Feminino , Florestas , Guiana Francesa/epidemiologia , Ouro , Humanos , Leishmania braziliensis/isolamento & purificação , Leishmania guyanensis/isolamento & purificação , Leishmania mexicana/isolamento & purificação , Leishmaniose Cutânea/parasitologia , Masculino , Pessoa de Meia-Idade , Mineração/estatística & dados numéricos , Fatores de Risco , Adulto Jovem
13.
Am J Trop Med Hyg ; 101(4): 780-788, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31407656

RESUMO

American tegumentary leishmaniasis is an endemic anthropozoonosis undergoing expansion on the American continent. The disease is caused by several Leishmania species and it is manifested as cutaneous and mucocutaneous leishmaniasis. In this study, we evaluate the viability of high-resolution melt polymerase chain reaction (HRM-PCR) analysis to differentiate four closely related Leishmania species as a routine tool for the diagnosis of leishmaniasis. For this purpose, biopsy specimens from cutaneous and mucocutaneous lesions were taken from 132 individuals from endemic and non-endemic areas for leishmaniasis. Each sample was processed for parasitological, histopathological, and molecular analysis. Positive biopsy samples were analyzed by HRM-PCR of a 144-bp heat-shock protein (hsp70) gene fragment, and new cases were confirmed by sequencing. Of the 132 samples analyzed, 36 (27%) were positive for Leishmania spp., of which 86% were from cutaneous lesions and 14% from mucocutaneous lesions. We identified Leishmania (Viannia) braziliensis (84%), Leishmania (Leishmania) infantum (13%), and Leishmania (Leishmania) amazonensis (3%) in cutaneous lesions, and L. (V.) braziliensis (40%), L. (L.) infantum (20%), L. (L.) amazonensis (20%), and Leishmania (Viannia) guyanensis (20%) in mucocutaneous lesions. The main purpose of this research was to report for the first time in Paraguay the presence of L. (L.) amazonensis and L. (V.) guyanensis in patients with cutaneous and mucocutaneous lesions, using the HRM-PCR technique. In addition, we report the presence of additional new cases of L. (L.) infantum in cutaneous lesions.


Assuntos
Leishmania braziliensis/isolamento & purificação , Leishmania guyanensis/isolamento & purificação , Leishmania infantum/isolamento & purificação , Leishmaniose Cutânea/epidemiologia , Leishmaniose Mucocutânea/epidemiologia , Adulto , Idoso , Feminino , Geografia , Humanos , Leishmania braziliensis/genética , Leishmania guyanensis/genética , Leishmania infantum/genética , Leishmaniose Cutânea/parasitologia , Leishmaniose Cutânea/patologia , Leishmaniose Mucocutânea/parasitologia , Leishmaniose Mucocutânea/patologia , Masculino , Pessoa de Meia-Idade , Paraguai/epidemiologia , Reação em Cadeia da Polimerase , Alinhamento de Sequência , Análise de Sequência de DNA , Pele/parasitologia , Pele/patologia
14.
Biomédica (Bogotá) ; 39(supl.2): 58-65, ago. 2019.
Artigo em Inglês | LILACS | ID: biblio-1038828

RESUMO

Abstract Introduction: Mucosal leishmaniasis has a progressive course and can cause deformity and even mutilation in the affected areas. It is endemic in the American continent and it is mainly caused by Leishmania (Viannia) braziliensis. Objective: To describe a series of mucosal leishmaniasis cases and the infectious Leishmania species. Materials and methods: We included 50 patients with a clinical diagnosis of mucosal leishmaniasis and parasitological confirmation, and we described their clinical and laboratory results. We performed species typing by PCR-RFLP using the miniexon sequence and hsp70 genes; confirmation was done by sequencing. Results: The median time of disease evolution was 2.9 years (range: 1 month to 16 years). The relevant clinical findings included mucosal infiltration (94%), cutaneous leishmaniasis scar (74%), total loss of the nasal septum (24%), nasal deformity (22%), and mucosal ulceration (38%). The symptoms reported included nasal obstruction (90%), epistaxis (72%), rhinorrhea (72%), dysphonia (28%), dysphagia (18%), and nasal pruritus (34%). The histopathological study revealed a pattern compatible with leishmaniasis in 86% of the biopsies, and amastigotes were identified in 14% of them. The Montenegro skin test was positive in 86% of patients, immunofluorescence in 84%, and culture in 8%. Leishmania (V.) braziliensis was identified in 88% of the samples, L. (V) panamensis in 8%, and L. (V.) guyanensis and L. (L.) amazonensis in 2% respectively. Conclusion: In this study, we found a severe nasal disease with destruction and deformity of the nasal septum in 25% of the cases, probably associated with late diagnosis. Leishmania (V.) braziliensis was the predominant species. We described a case of mucosal leishmaniasis in Colombia caused by L. (L.) amazonensis for the first time.


Resumen Introducción. La leishmaniasis mucosa tiene un curso progresivo y puede causar deformidad e incluso mutilación de las zonas afectadas. Es endémica en el continente americano y es causada principalmente por Leishmania (Viannia) brasiliensis. Objetivo. Describir una serie de casos de leishmaniasis mucosa y las especies de Leishmania infecciosas. Materiales y métodos. Se estudiaron 50 pacientes con diagnóstico clínico de leishmaniasis mucosa y confirmación parasitológica. Se describieron sus características clínicas y los resultados de laboratorio. La tipificación de especies se hizo mediante reacción en cadena de la polimerasa de los polimorfismos de la longitud de los fragmentos de restricción (Restriction Fragment Length Polymorphism Polymerase Chain Reaction, PCR-RFLP) en la secuencia del miniexon y el gen hsp70 y se confirmó por secuenciación. Resultados. La evolución de la enfermedad fue de un mes a dieciséis años (mediana de 2,8 años). Los hallazgos clínicos fueron los siguientes: infiltración mucosa (94 %), cicatriz de leishmaniasis cutánea (74 %), pérdida total del tabique nasal (24 %), deformidad nasal (22 %) y ulceración (38 %). Los síntomas reportados fueron: obstrucción nasal (90 %), epistaxis (72 %), rinorrea (72 %), disfonía (28 %), disfagia (18 %) y prurito nasal (34 %). La histopatología mostró un patrón compatible con leishmaniasis en 86 % de las biopsias y se identificaron amastigotes en 14 % de ellas. La prueba de Montenegro fue positiva en 86 % de los pacientes, la inmunofluorescencia en 84 %, y el cultivo en 8 %. Leishmania (V.) brasiliensis se identificó en 88 % de las muestras, L. (V) panamensis en 8 %, y L. (V.) guyanensis y L. (L.) amazonensis en 2 %, respectivamente. Conclusión. Se encontró enfermedad nasal grave con destrucción y deformidad del tabique nasal en una cuarta parte de los casos, probablemente debido a un diagnóstico tardío. Leishmania (V.) brasiliensis fue la especie predominante. Se describe por primera vez un caso de leishmaniasis mucosa causado por L. (L.) amazonensis en Colombia.


Assuntos
Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Leishmania braziliensis/isolamento & purificação , Leishmaniose Mucocutânea/parasitologia , Leishmania guyanensis/isolamento & purificação , Pele/parasitologia , Especificidade da Espécie , Leishmania braziliensis/classificação , Leishmania braziliensis/genética , Polimorfismo de Fragmento de Restrição , Leishmaniose Mucocutânea/complicações , Leishmaniose Mucocutânea/patologia , Leishmaniose Mucocutânea/epidemiologia , Proteínas de Protozoários/genética , Reação em Cadeia da Polimerase , DNA de Protozoário/genética , Análise de Sequência de DNA , Genes de Protozoários , Leishmania guyanensis/classificação , Leishmania guyanensis/genética , Colômbia/epidemiologia , Proteínas de Choque Térmico HSP70/genética
15.
Vector Borne Zoonotic Dis ; 19(12): 896-900, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31314697

RESUMO

Presence of Leishmania spp. was evaluated in the blood of nine red howler monkeys (Alouatta seniculus) from a specific area of French Guiana, located in the northeast of the Amazon. The molecular detection was performed based on PCR targeting the markers 18S rRNA, kDNA and ITS2 genes, as well as rapid immunomigration tests. Two monkeys were positive for Leishmania infantum and one for Leishmania guyanensis. While L. guyanensis cutaneous leishmaniasis is common, visceral leishmaniasis (human and canine) caused by L. infantum has never been described in this area. The howler monkey proved to be a sentinel and a potential reservoir of a serious zoonosis. These results must be carefully considered by public health officials and veterinarians in the future.


Assuntos
Alouatta , Leishmania guyanensis/isolamento & purificação , Leishmania infantum/isolamento & purificação , Leishmaniose Mucocutânea/veterinária , Leishmaniose Visceral/veterinária , Doenças dos Macacos/parasitologia , Animais , Guiana Francesa/epidemiologia , Leishmania guyanensis/genética , Leishmania infantum/genética , Leishmaniose Mucocutânea/epidemiologia , Leishmaniose Mucocutânea/parasitologia , Leishmaniose Visceral/epidemiologia , Leishmaniose Visceral/parasitologia , Doenças dos Macacos/epidemiologia , Filogenia
16.
Med Sante Trop ; 29(1): 43-45, 2019 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-31031246

RESUMO

A 40-year-old soldier in Guyana consulted at the end of December for skin lesions that had been developing for several weeks after he was lost overnight in the equatorial forest, near the village of Saul. He was bitten by numerous mosquitoes during the night and as he crossed marshy areas. When he arrived at the clinic he had 23 leishmaniasis sites visible.


Assuntos
Leishmania guyanensis/isolamento & purificação , Leishmaniose Mucocutânea/diagnóstico , Adulto , Animais , Florestas , Guiana , Humanos , Masculino
17.
Mem Inst Oswaldo Cruz ; 113(12): e180323, 2018 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-30540021

RESUMO

BACKGROUND The transmission routes for American cutaneous leishmaniasis (ACL) are in flux, so studies examining its transmission in humans, mammalian hosts, and sand fly vectors are urgently needed. OBJECTIVES The aim of this work was understand the epidemiological cycles of Leishmania spp., which causes ACL in the Andean Region of Venezuela, by identifying the Leishmania and the sand fly species involved in human and dog infections. METHODS Thirty-one biopsies from patients in Mérida and Táchira states with suspected ACL were studied by both parasitological tests (cultures and hamster inoculation) and a molecular test [Internal transcribed spacer 1 (ITS1) nested polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP)]. We also conducted a survey to detect Leishmania infection in dogs (Immunifluorescence antibody test and ITS1 nested PCR-RFLP) and sand flies (ITS1 nested PCR-RFLP) from El Carrizal, a highly endemic focus of ACL in Venezuela. FINDINGS Three different Leishmania species were identified in the clinical samples from humans (Leishmania braziliensis, L. guyanensis, and L. mexicana) and dogs (L. guyanensis and L. mexicana). The predominant sand fly species found were those from the Verrucarum group (infected with L. mexicana) and Lutzomyia migonei (infected with L. guyanensis and L. mexicana). MAIN CONCLUSIONS We show that Lu. migonei may be the putative vector in two ACL epidemiological cycles, involving L. guyanensis and L. mexicana. We also report for the first time the presence of L. guyanensis in domestic animals.


Assuntos
DNA Espaçador Ribossômico/genética , Insetos Vetores/parasitologia , Leishmania braziliensis/genética , Leishmania guyanensis/genética , Leishmania mexicana/genética , Leishmaniose Cutânea/parasitologia , Psychodidae/parasitologia , Animais , Cães , Feminino , Humanos , Leishmania braziliensis/isolamento & purificação , Leishmania guyanensis/isolamento & purificação , Leishmania mexicana/isolamento & purificação , Leishmaniose Cutânea/transmissão , Tipagem Molecular , Reação em Cadeia da Polimerase , Polimorfismo de Fragmento de Restrição , Venezuela
18.
Am J Trop Med Hyg ; 99(6): 1537-1540, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30277199

RESUMO

Chronic skin lesions constitute a clinical diagnostic challenge. We report the case of a patient whose facial lesion was histopathologically compatible with squamous cell carcinoma and hence programmed for Mohs surgery. However, review of the clinical and epidemiological history led to laboratory diagnosis of cutaneous leishmaniasis, treatment with miltefosine, and complete resolution of the lesion.


Assuntos
Anticorpos Antiprotozoários/análise , Carcinoma de Células Escamosas/diagnóstico , Leishmania guyanensis/isolamento & purificação , Leishmaniose Cutânea/diagnóstico , Neoplasias Cutâneas/diagnóstico , Antiprotozoários/uso terapêutico , Carcinoma de Células Escamosas/patologia , Diagnóstico Diferencial , Feminino , Humanos , Leishmania guyanensis/imunologia , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Cutânea/parasitologia , Leishmaniose Cutânea/patologia , Pessoa de Meia-Idade , Cirurgia de Mohs , Fosforilcolina/análogos & derivados , Fosforilcolina/uso terapêutico , Neoplasias Cutâneas/patologia , Resultado do Tratamento
19.
Am J Trop Med Hyg ; 99(5): 1165-1169, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30203744

RESUMO

The disseminated form of leishmaniasis is a serious and rare disease, being diagnosed in 2% of the cutaneous cases registered per year in Brazil. The main characteristic is the appearance of multiple pleomorphic lesions on the cutaneous surface. A 68-year-old male from the rural area of Tocantins, Brazil, presented atypical disseminated cutaneous leishmaniasis (ACL). The clinical course and histopathological and immunological findings presented a mixed pattern that hindered diagnosis and therapeutic management. Molecular typing revealed a mixed infection with Leishmania (V.) guyanensis and Leishmania (L.) amazonensis. Molecular identification of the agents responsible for ACL is important for adequate therapeutic planning, minimizing the possibility of sequellae that impact the quality of life of the patient.


Assuntos
Coinfecção/diagnóstico , Coinfecção/parasitologia , Leishmania guyanensis/genética , Leishmania mexicana/genética , Leishmaniose Cutânea/diagnóstico , Idoso , Anfotericina B/uso terapêutico , Antiprotozoários/uso terapêutico , Brasil , DNA de Protozoário/genética , Técnica Indireta de Fluorescência para Anticorpo , Humanos , Leishmania guyanensis/isolamento & purificação , Leishmania mexicana/isolamento & purificação , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Cutânea/parasitologia , Masculino , Tipagem Molecular , População Rural , Pele/parasitologia , Pele/patologia
20.
Acta Trop ; 185: 204-211, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29852129

RESUMO

The current four year study was undertaken to investigate the clinical and epidemiological features of Leishmania (Viannia) guyanensis infections in Valle Hermoso, Santo Domingo de Los Tsachilas province, north-central Pacific areas of Ecuador. A total of 155 parasitologically confirmed (Leishmania-amastigote-positive) clinical cases diagnosed at a rural health center during January 2014-December 2017 were analyzed thoroughly. Molecular characterization of the causative Leishmania parasites from different endemic sites within the study areas was performed by PCR amplification of cytochrome b (cyt b) sequencing. All the FTA-card and/or smear impregnated materials tested were characterized, and identified as L. (V.) guyanensis, without detecting any other Leishmania species. The following features were described: 1) the majority of patients were suffered from a single ulcer lesion (simple and mild to chronic), followed by multiple lesions, including recidiva cutis-"like" and Chiclero's ulcer-"like" clinical forms; 2) the majority (65.70%) of lesions were less than 10 mm in size, and distributed mainly on the upper body regions (arm, forearm, face, and neck including ear and head); 3) about 30% (29.68%) of the subjects tested were less than 10 years of age, strongly suggesting the intra- and/or peri-domestic transmission of the disease in the areas. The current clinico-epidemiological feature detected emphasizes the need for further such investigations of the L. (V.) guyanensis infections prevalent at different Pacific ecoregions of Ecuador, including Amazon regions.


Assuntos
Leishmania guyanensis , Leishmaniose Mucocutânea/epidemiologia , Adolescente , Adulto , Idoso , Animais , Criança , Pré-Escolar , Citocromos b/genética , Equador/epidemiologia , Feminino , Humanos , Lactente , Leishmania guyanensis/genética , Leishmania guyanensis/isolamento & purificação , Leishmaniose Mucocutânea/transmissão , Masculino , Pessoa de Meia-Idade , Prevalência , Adulto Jovem
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