Consulta: creatorFacets:"Machado,JG"
Registros recuperados: 3
Data/hora: 07/06/2024 07:22:57

Cell-mediated immune response to Leishmania chagasi experimental infection of BALB/c immunosuppressed mice
Provedor de dados: 80
Autores: Machado,JG; Hoffmann,JL; Krause,VLK; da Silva,AV; Dias-Melicio,LA; Langoni,H.
Leishmaniasis, a zoonosis of worldwide distribution, presents a significant impact on immunosupressed patients. This study aimed to evaluate Leishmania chagasi infection in BALB/c mice immunosuppressed with dexamethasone. Spleen cells stimulated or not with L. chagasi were cultured for cytokine quantification (IFN-γ, IL-2, IL-4 and IL-10) by sandwich ELISA. Parasite loads in the spleen and liver were determined by means of culture microtitration. Immunosuppressed groups showed statistically lower spleen weight and CD4-cell percentage in blood on the day of infection and produced Th1 and Th2 cytokines on other days of the study. The other infected groups, weather immunosupressed or not, also produced Th1 and Th2 cytokines. Parasite loads in the spleen and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Visceral leishmaniasis; Immunosuppression; Immunopathology; Mice; Interleukins.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000100013

Performance of IFAT, ELISA, direct parasitological examination and PCR on lymph node aspirates for canine visceral leishmaniasis diagnosis
Provedor de dados: 80
Autores: Camargo,JB; Langoni,H; Troncarelli,MZ; Machado,JG; Lucheis,SB; Padovani,CR.
Canine visceral leishmaniasis (CVL) is endemic in numerous Brazilian regions. The greatest difficulty in controlling the disease is the diagnostic limitation. In the present study, the most common tests employed for visceral leishmaniasis diagnosis were compared: immunofluorescence antibody test (IFAT), immunoenzymatic assay (ELISA), direct parasitological examination and polymerase chain reaction (PCR). Samples of lymph node aspirates and blood were collected from 100 dogs that lived in an endemic area (Bauru city, São Paulo state) and from 100 negative controls from a non-endemic area (Botucatu city, São Paulo state). Specificity of both IFAT and PCR was 100% whereas ELISA was 99%. Sensitivities were 97.77, 93.33 and 91.11% respectively for IFAT, ELISA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Visceral leishmaniasis; Dog; Diagnosis.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000300007

Experimental infection with Leishmania chagasi in immunosuppressed Balb/c mice: cytokines and parasite burdens
Provedor de dados: 80
Autores: Hoffmann,JL; Machado,JG; Gaio,FC; Dias-Melicio,LA; Langoni,H.
The immune response in leishmaniasis may result in a polarization of the T lymphocyte subpopulation, altering cell phenotype and resulting in immune protection or disease exacerbation. Leishmania may persist in the body either during asymptomatic infections or after treatment, which represents high risk under immunosuppression. The objective of this study was to evaluate the effect of infection with immunosuppression by dexamethasone associated with pentoxifylline on animal weight, spleen weight, spleen and hepatic parasitic load and immunopathology, as well as the IFN-γ and IL-10 production in spleen cell culture of Balb/c mice infected with Leishmania chagasi. The infection did not cause body weight gain in animals, but both the weight and size of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leishmania chagasI; Immunosuppression; Cell-mediated response; Parasite burden; Experimental infection.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000300004