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Canine visceral leishmaniasis due to Leishmania (L.) infantum chagasi in Amazonian Brazil: comparison of the parasite density from the skin, lymph node and visceral tissues between symptomatic and asymptomatic, seropositive dogs; Leishmaniose visceral canina causada por Leishmania (L.) infantum chagasi na Amazônia brasileira: comparação da densidade parasitária da pele, linfonodo e vísceras entre cães soropositivos, sintomáticos e assintomáticos

LIMA, Luciana Vieira R.; CARNEIRO, Liliane Almeida; CAMPOS, Marliane Batista; CHAGAS, Eujênia Janis; LAURENTI, Márcia D.; CORBETT, Carlos E.P.; LAINSON, Ralph; SILVEIRA, Fernando Tobias
Fonte: Instituto de Medicina Tropical Publicador: Instituto de Medicina Tropical
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
96.7%
Canine visceral leishmaniasis (CVL) is recognizable by characteristic signs of disease and is highly lethal. The infection, however, may be quite inapparent in some seropositive dogs, and this has raised the polemic question as to whether or not such animals can be a source of infection for Lutzomyia longipalpis, the vector of American visceral leishmaniasis (AVL). In this study we have examined 51 dogs with acute CVL from an AVL area in Pará State, northern Brazil, and compared the parasite density, amastigotes of Leishmania (L.) infantum chagasi, in the skin, lymph node and viscera of symptomatic with that of nine asymptomatic but seropositive dogs (IFAT-IgG). Post-mortem biopsy fragments of these tissues were processed by immunohistochemistry, using a polyclonal antibody against Leishmania sp. The X² and Mann Whitney tests were used to evaluate the means of infected macrophage density (p < 0.05). There was no difference (p > 0.05) in the skin (10.7/mm² x 15.5/mm²) and lymph node (6.3/mm² x 8.3/mm²), between asymptomatic and symptomatic dogs, respectively. It was higher (p < 0.05), however, in the viscera of symptomatic (5.3/mm²) than it was in asymptomatic (1.4/mm²) dogs. These results strongly suggest that asymptomatic or symptomatic L. (L.) i. chagasi-infected dogs can serve as a source of infection...

Canine visceral leishmaniasis: Performance of a rapid diagnostic test (Kalazar Detect (TM)) in dogs with and without signs of the disease

LEMOS, Elenice Moreira; LAURENTI, Marcia Dalastra; MOREIRA, Marcio Antonio Batistela; REIS, Alexandre Barbosa; GIUNCHETTI, Rodolfo Cordeiro; RAYCHAUDHURI, Syamal; DIETZE, Reynaldo
Fonte: ELSEVIER SCIENCE BV Publicador: ELSEVIER SCIENCE BV
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
96.63%
Current visceral leishmaniasis (VL) control programs in Brazil include the infected dog elimination but, despite this strategy, the incidence of human VL is still increasing. One of the reasons is the long delay between sample collection, analysis, control implementation and the low sensitivity of diagnostic tests. Due to the high prevalence of asymptomatic dogs, the diagnosis of these animals is important considering their vector infection capacity. Hence, a rapid and accurate diagnosis of canine visceral leishmaniasis is essential for an efficient surveillance program. In this study we evaluated the performance of rK39 antigen in an immunochromatographic format to detect symptomatic and asymptomatic Leishmania chagasi infection in dogs and compared the results with those using a crude antigen ELISA. The sensitivity of rK39 dipstick and ELISA were 83% vs. 95%, respectively, while the specificity was both 100%. Our results also demonstrated that the dipstick test was able to detect infected dogs presenting different clinical forms. (C) 2008 Elsevier B.V. All rights reserved.

Canine visceral leishmaniasis and Chagas disease among dogs in Araguaína, Tocantins; Leishmaniose visceral canina e doença de Chagas em cães de Araguaína, Tocantins

Morais, Arielle Nunes; Sousa, Marlos Gonçalves; Ekman, Luciana Regina Meireles Jaguaribe; Kesper Jr, Norival; Umezawa, Eufrosina Setsu
Fonte: Jaboticabal Publicador: Jaboticabal
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
96.74%
The present study analyzed serum samples from 111 male and female dogs of various ages from the municipality of Araguaína in the State of Tocantins, Brazil. Serological diagnosis of canine visceral leishmaniasis (CVL) was initially performed at the Central Laboratory (Laboratório Central – LACEN) of Araguaína, resulting in 61 positive samples by an indirect immunofluorescence assay (IIFA) (≥1:40) and 50 non-reactive samples. The same samples were analyzed at the São Paulo Institute of Tropical Medicine (Instituto de Medicina Tropical de São Paulo – IMTSP) by an enzyme- linked-immunosorbent assay (ELISA), resulting in 57 positive samples (51.35%) and 54 negative samples (48.64%). The Kappa coefficient of agreement between the tests was 0.74. The serum samples were also subjected to a diagnostic assay for Trypanosoma cruzi (Trypomastigote Excreted/Secreted Antigens -TESA-blot) that detected five suspect animals; three of those animals were positive for leishmaniasis by ELISA but negative by IIFA. These findings suggest that the canine population of Araguaína may be simultaneously infected with Leishmania chagasi and T. cruzi. The results obtained demonstrate the difficulty of using serology to detect CVL, thus emphasizing the necessity for a reference test to diagnose CVL...

Leishmaniose visceral canina: aspectos clínico-epidemiológicos de casos atendidos no período de 1997 a 2007, no Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo; Canine visceral leishmaniasis: clinical and epidemiologic aspects of cases attended between 1997 to 2007, at the Animal Hospital of the Faculty of Medicine and Zootechny of the University of São Paulo

Sonoda, Marcia Cristina
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 29/11/2007 PT
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A leishmaniose é uma enfermidade zoonótica causada por protozoário pleomórfico do gênero Leishmania. Face a magnitude de alastramentro da doença, em especial no Brasil, foi realizado levantamento retrospectivo de casos de leishmaniose visceral canina diagnosticados (1997-2007) nos Serviços de Dermatologia e de Clínica Médica de cães e gatos do HOVET/USP. A amostragem compôs-se de 36 casos caninos, naturalmente infectados por Leishmania sp. O diagnóstico fora estabelecido pela caracterização propiciada pelos dados anamnésticos, de exames físico e dermatológico, complementados por exames hematológicos, bioquímicos e imagéticos, afora sorologia (ELISA e/ou RIFI), histopatologia de pele e/ou pela evidencialização do protozoário em exames parasitológicos de biópsia aspirativa de linfonodos e/ou medula óssea e pela técnica de imunoistoquímica. Os objetivos foram: evidenciar os aspectos clínico-dermatológicos de animais com diagnóstico estabelecido; caracterizar epidemiologicamente os casos, enfocando aspectos de aloctonia ou de autoctonia. Afora o de avaliar a aplicação da técnica de imunoistoquímica de pele visando o diagnóstico etiológico, comparando e relacionando-a aos exames complementares. Pôde-se concluir que: todos os casos foram alóctones; não houve predisposição por um determinado sexo; a faixa etária (52...

Comparison between ELISA using total antigen and immunochromatography with antigen rK39 in the diagnosis of canine visceral leishmaniasis

Felix de Lima, Valeria Marcal; Fattori, Karina Reinaldo; Michelin, Aparecida de Fatima; da Silveira Neto, Luiz; Vasconcelos, Rosemere de O.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 330-333
ENG
Relevância na Pesquisa
96.59%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); In this study, an enzyme-linked immunosorbent assay using crude total antigen (CTA-ELISA) and immunochromatography with antigen rK39 were compared in the diagnosis of canine visceral leishmaniasis (CVL). Fifty-two total blood samples from symptomatic dogs obtained from a location endemic for leishmaniasis and 52 blood samples from healthy dogs from a nonendemic region were tested. Polymerase chain reaction (PCR) was used to detect DNA from Leishmania spp. in both groups. Symptomatic dogs with positive PCR were considered infected by Leishmania spp. and the PCR technique was chosen as a gold standard test. The sensitivity determined for CTA-ELISA was 100%, with specificity of 91.2%, while the immunochromatographic assay with the antigen rK39 showed sensitivity of 91.5%, with specificity of 94.7%. A strong correlation was verified between CTA-ELISA and immunochromatography with antigen rK39, with a kappa coefficient of agreement of 0.88. Analysis of the results suggested that both assays presented good sensitivity and specificity for diagnosing CVL; however, immunochromatography with the antigen rK39 may be more advantageous when a fast field test is required. (C) 2010 Elsevier B.V. All rights reserved.

Leishmune (R) vaccine blocks the transmission of canine visceral leishmaniasis - Absence of Leishmania parasites in blood, skin and lymph nodes of vaccinated exposed dogs

Nogueira, F. S.; Moreira, MAB; Borja-Cabrera, G. P.; Santos, F. N.; Menz, I; Parra, L. E.; Xu, Z.; Chu, H. J.; Palatnik-de-Sousa, C. B.; Luvizotto, MCR
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 4805-4810
ENG
Relevância na Pesquisa
96.54%
Leishmune (R) vaccine is the first licensed vaccine against canine visceral leishmaniasis. It contains the Fucose-Mannose-ligand (FML) antigen of Leishmania donovani. The potential Leishmune (R) vaccine effect on the interruption of the transmission of the disease, was assayed by monitoring, in untreated (n = 40) and vaccinated dogs (n = 32) of a Brazilian epidemic area: the kala-azar clinical signs, the FML-seropositivity and the Leishmania parasite evidence by immunohistochemistry of skin and PCR for Leishmanial DNA of lymph node and blood samples. on month I I after vaccination, untreated controls showed: 25% of symptomatic cases, 50% of FML-seropositivity, 56.7% of lymph node PCR, 15.7% of blood PCR and 25% of immunohistochemical positive reactions. The Leishmune (R)-vaccinated dogs showed 100% of seropositivity to FML and a complete absence of clinical signs and of parasites (0%) in skin, lymph node and blood PCR samples (P < 0.01). The positivity in FML-ELISA in untreated dogs significantly correlates with the PCR in lymph node samples (p < 0.001) and with the increase in number of symptoms (p = 0.006) being strong markers of infectiousness. The absence of symptoms and of evidence of Leishmania DNA and parasites in Leishmune (R)-vaccinated animals indicates the non-infectious condition of the Leishmune (R)-vaccinated dogs. (c) 2005 Elsevier Ltd. All rights reserved.

Immunotherapy with the saponin enriched-Leishmune (R) vaccine versus immunochemotherapy in dogs with natural canine visceral leishmaniasis

Borja-Cabrera, G. P.; Santos, F. N.; Santos, F. B.; Trivellato, Fernando Antonio de A.; Kawasaki, Jarbas Kiyoshi A.; Costa, Andreia Cerqueira; Castro, Tatiana; Nogueira, F. S.; Moreira, M. A. B.; Luvizotto, M. C. R.; Palatnik, M.; Palatnik-de-Sousa, C. B.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 597-603
ENG
Relevância na Pesquisa
96.54%
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Leishmune (R), the first licensed vaccine for prophylaxis against canine visceral leishmaniasis (CVL) and is also immunotherapeutic when used with double saponin adjuvant concentration. The Leishmune (R) therapeutic vaccine was assessed for immunotherapy (IT) in 31 infected dogs and for iminunochemotherapy (ICT) in combination with allopurinol or amphotericinB/allopurinol, in 35 dogs Compared to infected untreated control dogs, at month 3. both treatments increased the proportion of dogs showing intradermal response to Leishmania antigen to a similar extent (from 8 to 67%, in the IT and to 76%, in the ICT groups), and conversely reduced from 100 to 38% (IT) and to 18% (ICT) the proportion of symptomatic cases, from 54 to 12% (IT) and to 15% (ICT) the proportion of parasite evidence in lymph nodes and from 48 to 19% (IT) and 12% (ICT) the proportion of deaths, indicating that the immunotherapy with enriched-Leishmune (R) vaccine promotes the control of the clinical and parasitological signs of CVL rendering most dogs asymptomatic although PCR positive. By month 8, negative lymph node PCR results were obtained in 80% of the ICT-treated dogs, but only in 33% of the IT group (p = 0.0253)...

A β-mercaptoethanol-modified enzyme-linked immunosorbent assay for diagnosis of canine visceral leishmaniasis

Veloso, Laura; Semião-Santos, Saul; Andrade, Paulo; Melo, Márcia; Martins, Luís; Marinho, Artur; Almeida, José; Cardoso, Luís; Harith, Abdallah
Fonte: Universidade de Évora Publicador: Universidade de Évora
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
96.74%
A β-mercaptoethanol-modified enzyme-linked immunosorbent assay for diagnosis of canine visceral leishmaniasis Laura Barral-Veloso, Saul J. Semião-Santos, Paulo P. de Andrade, Marcia A. de Melo, Luís Martins, Artur A. Marinho, José A. A. de Almeida, Luís Cardoso, Abdallah el Harith Abstract Two immunoglobulin G enzyme-linked immunosorbent assay (ELISA) versions using whole promastigotes of Leishmania infantum (syn. Leishmania chagasi) treated either with β-mercaptoethanol (β-ME_ELISA) or trypsin (TRYP-ELISA) as antigens were developed for the diagnosis of canine visceral leishmaniasis (CVL). By comparison with the direct agglutination test (DAT; 100%, 31/31; 95% confidence interval [CI]: 86.3-100%, slightly lower sensitivity was demonstrated for the newly developed β-ME-ELISA (93,5%, 29/31; 95% CI: 77.2-98.9). Sensitivity was higher for β-ME-ELISA compared with TRYP-ELISA (87.1%, 27/31; 95% CI: 69.2-95.8%) in serum samples from dogs with CVL. When tested with sera from 37 healthy dogs and from 45 dogs with clinical conditions other than CVL, a specificity of 97.6% (80/82; 95% CI: 87.3-98.4%) for DAT and TRYP-ELISA, respectively. Observed agreement was 94.0% (95% CI: 88.7-97.1%) between DAT and β-ME-ELISA (k = 0.879; 95% CI: 0.803-0.956) and 87.4% (95% CI: 80.8-92.1%) between DAT and TRYP-ELISA (k = 0.743; 95% CI: 0.636-0.851). Current results advocate application of the new β-ME-ELISA for diagnosis of CVL at the laboratory level and confirmation of results obtaines with the DAT in field studies. Key words: Antigen; β –mercaptoethanol; canine visceral leishmaniasis; diagnosis; enzyme-linked immunosorbent assay

Canine visceral leishmaniasis due to Leishmania (L.) infantum chagasi in Amazonian Brazil: comparison of the parasite density from the skin, lymph node and visceral tissues between symptomatic and asymptomatic, seropositive dogs

Lima,Luciana Vieira R.; Carneiro,Liliane Almeida; Campos,Marliane Batista; Chagas,Eujênia Janis; Laurenti,Márcia D.; Corbett,Carlos E.P.; Lainson,Ralph; Silveira,Fernando Tobias
Fonte: Instituto de Medicina Tropical Publicador: Instituto de Medicina Tropical
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2010 EN
Relevância na Pesquisa
96.65%
Canine visceral leishmaniasis (CVL) is recognizable by characteristic signs of disease and is highly lethal. The infection, however, may be quite inapparent in some seropositive dogs, and this has raised the polemic question as to whether or not such animals can be a source of infection for Lutzomyia longipalpis, the vector of American visceral leishmaniasis (AVL). In this study we have examined 51 dogs with acute CVL from an AVL area in Pará State, northern Brazil, and compared the parasite density, amastigotes of Leishmania (L.) infantum chagasi, in the skin, lymph node and viscera of symptomatic with that of nine asymptomatic but seropositive dogs (IFAT-IgG). Post-mortem biopsy fragments of these tissues were processed by immunohistochemistry, using a polyclonal antibody against Leishmania sp. The X² and Mann Whitney tests were used to evaluate the means of infected macrophage density (p < 0.05). There was no difference (p > 0.05) in the skin (10.7/mm² x 15.5/mm²) and lymph node (6.3/mm² x 8.3/mm²), between asymptomatic and symptomatic dogs, respectively. It was higher (p < 0.05), however, in the viscera of symptomatic (5.3/mm²) than it was in asymptomatic (1.4/mm²) dogs. These results strongly suggest that asymptomatic or symptomatic L. (L.) i. chagasi-infected dogs can serve as a source of infection...

First description of autochthonous canine visceral leishmaniasis in the metropolitan region of Vitória, State of Espírito Santo, Brazil

Tonini,Marco André Loureiro; Lemos,Elenice Moreira; Reis,Alexandre Barbosa; Vital,Wendel Coura; Dias,Edelberto Santos; Dietze,Reynaldo
Fonte: Sociedade Brasileira de Medicina Tropical - SBMT Publicador: Sociedade Brasileira de Medicina Tropical - SBMT
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2012 EN
Relevância na Pesquisa
96.63%
INTRODUCTION: We investigated autochthonous canine visceral leishmaniasis (CVL) in the metropolitan region of Vitória (MRV), an area in which a human case was previously reported. METHODS: Serological, parasitological, and molecular tests were performed in 201 dogs. RESULTS: Twenty-six (13%) and 12 (6%) dogs were identified as positive using in-house enzyme-linked immunosorbent assay (ELISA) and rK39 tests, respectively. Two dogs had a positive culture for Leishmania chagasi, and 4 were polymerase chain reaction (PCR)-positive for Leishmania spp. One positive dog belonged to the aforementioned patient. CONCLUSIONS: Although the responsible vector was not found, our results provide evidence of autochthonous CVL in the MRV, a non-endemic area for VL.

Canine visceral leishmaniasis and Chagas disease among dogs in Araguaina, Tocantins

Morais,Arielle Nunes; Sousa,Marlos Goncalves; Meireles,Luciana Regina; Kesper Jr.,Norival; Umezawa,Eufrosina Setsu
Fonte: Colégio Brasileiro de Parasitologia Veterinária Publicador: Colégio Brasileiro de Parasitologia Veterinária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2013 EN
Relevância na Pesquisa
96.63%
The present study analyzed serum samples from 111 male and female dogs of various ages from the municipality of Araguaína in the State of Tocantins, Brazil. Serological diagnosis of canine visceral leishmaniasis (CVL) was initially performed at the Central Laboratory (Laboratório Central – LACEN) of Araguaína, resulting in 61 positive samples by an indirect immunofluorescence assay (IIFA) (≥1:40) and 50 non-reactive samples. The same samples were analyzed at the São Paulo Institute of Tropical Medicine (Instituto de Medicina Tropical de São Paulo – IMTSP) by an enzyme-linked-immunosorbent assay (ELISA), resulting in 57 positive samples (51.35%) and 54 negative samples (48.64%). The Kappa coefficient of agreement between the tests was 0.74. The serum samples were also subjected to a diagnostic assay for Trypanosoma cruzi (Trypomastigote Excreted/Secreted Antigens -TESA-blot) that detected five suspect animals; three of those animals were positive for leishmaniasis by ELISA but negative by IIFA. These findings suggest that the canine population of Araguaína may be simultaneously infected with Leishmania chagasi and T. cruzi. The results obtained demonstrate the difficulty of using serology to detect CVL...

First autochthonous case of canine visceral leishmaniasis in Volta Redonda, Rio de Janeiro, Brazil

Campos,Monique Paiva de; Silva,Denise Amaro da; Madeira,Maria de Fatima; Velho Junior,Artur Augusto Mendes; Figueiredo,Fabiano Borges
Fonte: Colégio Brasileiro de Parasitologia Veterinária Publicador: Colégio Brasileiro de Parasitologia Veterinária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2013 EN
Relevância na Pesquisa
96.74%
In Brazil, American visceral leishmaniasis (AVL) is caused by Leishmania (Leishmania) chagasi and its main vector is Lutzomyia longipalpis. Cases of canine visceral leishmaniasis (CVL) in non-endemic areas have been reported over the last few years throughout the country. The objective of this research note is to describe an autochthonous case of CVL that occurred in the municipality of Volta Redonda, state of Rio de Janeiro, an area where the disease is not endemic, alerting veterinarians and the scientific community to the expansion of this important zoonosis and advising veterinary practitioners on how to deal with a suspicion of CVL. Canine visceral leishmaniasis can be misdiagnosed within a broad spectrum of canine diseases based on clinical and laboratory findings. Therefore, knowledge of its clinical manifestations, specific and sensitive laboratory diagnostic tests and parasitological procedures are of the utmost importance for rapid confirmation and notification of a case, thus contributing directly to the control of a focus.

Canine visceral leishmaniasis: Performance of a rapid diagnostic test (Kalazar Detect TM ) in dogs with and without signs of the disease

Lemos, Elenice Moreira; Laurenti, Marcia Dalastra; Moreira, M?rcio Ant?nio Batistela; Reis, Alexandre Barbosa; Giunchetti, Rodolfo Cordeiro; Raychaudhuri, Syamal; Dietze, Reynaldo
Fonte: Universidade Federal de Ouro Preto Publicador: Universidade Federal de Ouro Preto
Tipo: Artigo publicado em periodico
EN_US
Relevância na Pesquisa
96.63%
Current visceral leishmaniasis (VL) control programs in Brazil include the infected dog elimination but, despite this strategy, the incidence of human VL is still increasing. One of the reasons is the long delay between sample collection, analysis, control implementation and the low sensitivity of diagnostic tests. Due to the high prevalence of asymptomatic dogs, the diagnosis of these animals is important considering their vector infection capacity. Hence, a rapid and accurate diagnosis of canine visceral leishmaniasis is essential for an efficient surveillance program. In this study we evaluated the performance of rK39 antigen in an immunochromatographic format to detect symptomatic and asymptomatic Leishmania chagasi infection in dogs and compared the results with those using a crude antigen ELISA. The sensitivity of rK39 dipstick and ELISA were 83% vs. 95%, respectively, while the specificity was both 100%. Our results also demonstrated that the dipstick test was able to detect infected dogs presenting different clinical forms.

Histopathology, parasite density and cell phenotypes of the popliteal lymph node in canine visceral leishmaniasis

Giunchetti, Rodolfo Cordeiro; Martins Filho, Olindo Assis; Carneiro, Cl?udia Martins; Mayrink, Wilson; Marques, Marcos Jos?; Tafuri, Wagner Luiz; Oliveira, Rodrigo Corr?a de; Reis, Alexandre Barbosa
Fonte: Universidade Federal de Ouro Preto Publicador: Universidade Federal de Ouro Preto
Tipo: Artigo publicado em periodico
EN_US
Relevância na Pesquisa
96.54%
While enlargement of popliteal lymph nodes (LN) is frequently described in canine visceral leishmaniasis (CVL), there are few histopathologic studies of lymph nodes during this chronic immunopathological condition. Besides a detailed histopathologic analysis, we have characterized the parasite load and major immunophenotypic features of the LN inLeishmania (Leishmania ) chagasi-infected dogs. Our major histopathological findings highlight that hypertrophy/hyperplasia of LN cortical and medullary zones was the principal characteristic observed in asymptomatic dogs (AD), whereas atrophy of LN cortical zone was predominant in symptomatic animals (SD). The LN parasite density detected by anti- Leishmania immunohistochemical assay or expressed as Leishman Donovan Units was also highly correlated with the skin parasitism, the most reliable parameter to decode the clinical status of CVL. The major LN immunophenotypic changes during ongoing CVL were an increased frequency of T-lymphocytes, particularly CD8 + T-cells, up-regulation of MHC-II expression by lymphocytes and decreased levels of CD21 + B-cells. Our findings further demonstrated that changes in the LN B-lymphocyte compartment exhibited a negative correlation with the skin parasite load. Conversely...

Fatores de risco de Leishmaniose Visceral em cães no município de Panorama, Estado de São Paulo, SP, Brasil; Risks factors of Visceral Leishmaniasis in dogs in Panorama, São Paulo, State, Brazil

Villegas, Tatiana Jimenez
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 20/02/2015 PT
Relevância na Pesquisa
86.86%
A Leishmaniose Visceral Canina é uma doença na qual o ciclo de transmissão envolve a interação de vetores, parasitas, reservatórios e hospedeiros além de componentes ambientais, sociais, e biológicos, que tornam complexa a compreensão da dinâmica desta doença nas regiões endêmicas. Este estudo epidemiológico transversal de tipo caso controle objetivou a identificação de fatores sociodemográficos, socioeconômicos, ambientais, da dinâmica populacional canina e do estilo de vida dos cães, associados à ocorrência de Leishmaniose Visceral Canina no município de Panorama, estado de São Paulo, Brasil. Para a identificação destes fatores foi realizada um inquérito epidemiológico nos domicílios com cães positivos e negativos a Leishmaniose Visceral diagnosticados por sorologia no anos 2012 e 2013. Mediante um modelo de regressão logística foram considerados como fatores de risco para a ocorrência de Leishmaniose Visceral Canina: cães não castrados, cães que dormem fora de casa, famílias com renda inferior a três salários mínimos, presença de vegetação próximo do domicilio, não ter vidro na janela, ter vasos com plantas, ter arvores no quintal e aquisição de um cão no último ano. O desenvolvimento deste trabalho auxilia no programa de prevenção e controle da Leishmaniose Visceral Canina do Município de Panorama...

Canine visceral leishmaniasis: seroprevalence and risk factors in Cuiabá, Mato Grosso, Brazil

Almeida,Arleana do Bom Parto Ferreira de; Sousa,Valéria Régia Franco; Cruz,Felipe Augusto Constantino Seabra da; Dahroug,Magyda Arabia Araji; Figueiredo,Fabiano Borges; Madeira,Maria de Fátima
Fonte: Colégio Brasileiro de Parasitologia Veterinária Publicador: Colégio Brasileiro de Parasitologia Veterinária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2012 EN
Relevância na Pesquisa
96.63%
In Brazil, canine visceral leishmaniasis (CVL) is endemic and the number of cases in humans and dogs has increased in the Midwest region. A transversal study was carried out in endemic areas from Cuiabá, State of Mato Grosso, to assess data on seroprevalence and risk factors associated to canine infection. Four hundred and thirty (430) dogs were randomly evaluated through indirect fluorescence antibody test (IFAT) considering variables related to the animals, the environment and the knowledge by owners on CVL aspects and control. From 430 dogs, 95 (22.1%) were seroreagent for leishmaniasis and animals living in rural environments present risk 1.9 times higher for acquiring the disease than those in urban environments (p = 0.01; OR 1.9). Factors related to animals' habits, such as free access to the street and guard function were considered indicators to predict infection by Leishmania sp. (p < 0.05) by statistical univariate analysis. The presence of agricultural activities was also a fact that contributed for the insurgence of the infection (p = 0.02; OR 1.68). The results contributed to the knowledge on the aspects of CVL in Cuiabá and point to an urgent need to include educational and sanitary programs in the city, since the region presents favorable characteristics for spreading the infection of CVL as already observed in other Brazilian cities.

Outbreak of autochthonous canine visceral leishmaniasis in Santa Catarina, Brazil

Steindel,Mário; Menin,Álvaro; Evangelista,Tatiane; Stoco,Patrícia H.; Marlow,Mariel A.; Fleith,Renata C.; Pilati,Celso; Grisard,Edmundo C.
Fonte: Colégio Brasileiro de Patologia Animal - CBPA; Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Publicador: Colégio Brasileiro de Patologia Animal - CBPA; Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2013 EN
Relevância na Pesquisa
96.58%
The present study reports the first outbreak of autochthonous canine visceral leishmaniasis in Florianópolis, Santa Catarina, southern Brazil. Following the report of two cases of CVL, the Control Center of Zoonotic Diseases conducted a serological survey by ELISA and IFAT assays in seven districts of the Santa Catarina Island. Eleven seropositive dogs of autochthonous transmission were used in the present study. Infection by Leishmania sp. was confirmed by parasitological examination of bone marrow, liver, spleen and lymph nodes, culture in Schneider's medium and PCR. Leishmania sp. isolates were characterized by PCR-RFLP and hybridization with specific probes, allowing for the identification of Leishmania infantum. Autochthonous transmission of this disease in an area with high tourist traffic presents a major public health concern and signifies the emergence of an important zoonosis in southern Brazil. Therefore, the implementation of surveillance and control measures is imperative to prevent the spread of the disease among the canine population as well as transmission to the human population.

Desempenho do teste rápido imunocromatográfico (TRI) para o diagnóstico da leishmaniose visceral canina: comparação com outros métodos sorológicos em cães suspeitos de Cuiabá, Mato Grosso, Brasil; Performance of DPP™ immunochromathographic rapid test (IRT) for canine visceral leishmaniasis: comparison with other serological methods in suspected dogs from Cuiabá, Mato Grosso State, Brazil

De Santis, Bianca; Santos, Elizabeth Gloria Barbosa; Souza, Celeste da Silva Freitas de; Chaves, Sérgio Augusto de Miranda
Fonte: Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia Publicador: Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Publicado em 21/06/2013 ENG
Relevância na Pesquisa
96.63%
O teste rápido imunocromatográfico (TRI) para leishmaniose visceral canina (LVC) foi testado em cães suspeitos da área urbana de Cuiabá. O desempenho do teste foi comparado com RIFI e ELISA e, como padrão ouro, o teste parasitológico direto (TPD). A amostra com 45 cães foi selecionada pelo Centro de Controle de Zoonoses, sendo 23 (51,1%) machos, 34 (75,5%) sem raça definida e com idade estimada inferior a três anos. De acordo com os dados clínicos e os exames laboratoriais, 10 (26,3%) cães foram classificados como expostos, outros 10 (26,3%) como infectados e 18 (47,4%) como doentes. O TRI alcançou os melhores resultados quanto à sensibilidade, 62%, elevada especificidade, 87% e para os valores preditivos positivo e negativo: 83,30% e 81,48%, respectivamente, consolidado pelo coeficiente Kappa igual a 0,50, de concordância moderada. Os resultados confirmaram TRI como um bom preditor de doença e infecção para LVC.; The immunochromathographic rapid test (IRT) for canine visceral leishmaniasis (CVL) was tested in suspected dogs from the urban area of Cuiabá. The performance of IRT was compared with IFT and EIE and the direct parasitological test (DPT) as the gold standard. The sample, comprising 45 dogs, was selected by the Zoonosis Control Center. Twenty (51%) were male and thirty-four (75.5%) were both mongrel and had an estimated age of less than three years old. According to clinical data and lab tests: 10 (26.3%) dogs have been classified as exposed or infected and 18 (47.4%) as sick. IRT has achieved the best result for sensibility...

Estudo de campo para avaliação da efetividade de vacinação e de uso de coleiras impregnadas com inseticidas para o controle da leishmaniose visceral canina; Field study to evaluate the effectiveness of vaccination and insecticides impregnated collars to control canine visceral leishmaniasis

Lopes, Estela Gallucci
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 21/09/2015 PT
Relevância na Pesquisa
96.75%
As leishmanioses e particularmente a leishmaniose visceral (LV) são doenças transmitidas por vetores artrópodes candidatas a experimentar uma grande expansão territorial em virtude de problemas relacionados ao aquecimento global. Este evento climático deverá causar grande impacto sobre a distribuição geográfica do artrópode transmissor no Brasil e no mundo. Com efeito, nos últimos 20 anos a situação epidemiológica da LV no Brasil vem se modificando de um padrão esporádico prevalente eminentemente em áreas rurais para uma condição de epidemias peri-urbanas que pode afetar todos os estratos sociais da população, tornando-se uma séria ameaça à saúde pública. As leishmanioses são consideradas até o momento doenças não preveníveis e seu padrão epidemiológico vêm se alterando de forma flagrante, o que demanda urgência para o desenvolvimento de novas ferramentas de controle e tratamento. Dentre as diversas questões levantadas sobre as demandas em pesquisa relacionadas ao controle desta enfermidade, destaca-se a importância de avanços em estudos de epidemiologia quantitativa e modelagem matemática que permitam prever efeitos de vacinações de populações empregando-se imunógenos com eficácia e/ou cobertura vacinal menor que 100%...

Leishmaniose visceral canina causada por Leishmania (L.) infantum chagasi na Amazônia brasileira: comparação da densidade parasitária da pele, linfonodo e vísceras entre cães soropositivos, sintomáticos e assintomáticos; Canine visceral leishmaniasis due to Leishmania (L.) infantum chagasi in Amazonian Brazil: comparison of the parasite density from the skin, lymph node and visceral tissues between symptomatic and asymptomatic, seropositive dogs

Lima, Luciana Vieira R.; Carneiro, Liliane Almeida; Campos, Marliane Batista; Chagas, Eujênia Janis; Laurenti, Márcia D.; Corbett, Carlos E.P.; Lainson, Ralph; Silveira, Fernando Tobias
Fonte: Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo Publicador: Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/10/2010 ENG
Relevância na Pesquisa
96.7%
A leishmaniose visceral canina (LVC) é reconhecida pelas características clínicas da doença e é altamente letal. A infecção, entretanto, pode ser totalmente assintomática em alguns cães soropositivos, o que tem levantado questão polêmica sobre a possibilidade desses animais, serem ou não uma fonte importante da infecção para o flebotomíneo, Lutzomyia longipalpis, o principal vetor da leishmaniose visceral americana (LVA). Neste estudo foram examinados 51 cães com LVC aguda, provenientes de área endêmica de LVA no Estado do Pará, Brasil, e a carga parasitária, formas amastigotas de Leishmania (L.) infantum chagasi, na pele, linfonodo poplíteo e vísceras (fígado e baço) foi comparada com a de nove cães assintomáticos soropositivos (IFAT-IgG). Fragmentos de biópsia desses tecidos obtidos post-mortem foram processados para análise através de imunohistoquímica, usando um anticorpo policlonal contra Leishmania sp. Os testes do Qui-quadrado (X²) e Mann Whitney foram usados para avaliar as médias da densidade de macrófagos infectados (p < 0,05). Os resultados mostraram que não houve diferença (p > 0,05) na densidade de macrófagos infectados da pele (10,7/mm² x 15,5/mm²) e do linfonodo (6,3/mm² x 8...