Acanthamoeba Castellanii
Mostrando 1-12 de 107 artigos, teses e dissertações.
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1. An investigation of virulence factors of Legionella pneumophila environmental isolates
ABSTRACT Nine Legionella pneumophila strains isolated from cooling towers and a standard strain (L. pneumophila serogroup 1, ATCC 33152, Philadelphia 1) were analyzed and compared in terms of motility, flagella structure, ability to form biofilms, enzymatic activities (hemolysin, nucleases, protease, phospholipase A, phospholipase C, acid phosphatase, alkali
Braz. J. Microbiol.. Publicado em: 2018-03
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2. Avaliação da atividade amebicida do óleo essencial de Pterocaulon polystachyum frente à Acantamoeba polyphaga / Amebicidal activy evaluation of pterocaulon polystachyum essencial oil against acanthamoeba polyphaga
Espécies de Acanthamoeba pertencem ao grupo das amebas de vida livre e constituem um agente etiológico da ceratite amebiana, doença que pode causar inflamação ocular grave e até mesmo cegueira. Plantas do gênero Pterocaulon (Asteraceae) são utilizadas na medicina popular como agente anti-séptico e antifúngico. Neste trabalho, foi investigada a comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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3. Análise do co-cultivo de cepas de origem clínica e ambiental de acinetobacter baumannii com diferentes perfis de susceptibilidade a antimicrobianos com acanthamoeba spp.
Acinetobacter baumannii é um patógeno oportunista causador de infecções hospitalares, que pode interagir com outros microorganismos como amebas de vida livre (AVL) potencialmente patogênicas pertencentes ao gênero Acanthamoeba, tanto no ambiente hospitalar como nos efluentes. Foram realizados testes de hemólise, hemaglutinação, aderência a células
Publicado em: 2010
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4. Atividade de pterocaulon polystachyum DC. (asteraceae) frente a acanthamoeba castellanii
O gênero Pterocaulon agrupa cerca de 20 espécies sendo 10 delas encontradas no Rio Grande do Sul. Várias espécies de Pterocaulon, conhecidas como "Quitoco", são utilizadas na medicina popular na forma de infusão ou decocto com diferentes fins terapêuticos. O extrato metanólico bruto e as frações de Pterocaulon polystachyum apresentam largo espectro
Publicado em: 2009
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5. Caracterização de isolados de Acanthamoeba em água de piscinas da cidade de Porto Alegre, RS / Characterization of Acanthamoeba isolates in swimming pools water at the city of Porto Alegre, RS
Foram coletadas amostras de água de piscinas térmicas e não térmicas na cidade de Porto Alegre, RS, Brasil entre os meses de maio de 2006 e março de 2007, com o objetivo de determinar a presença do gênero Acanthamoeba, bem como realizar a caracterização fenotípica e genotípica dos isolados. Amebas foram isoladas em cultivo monoxênico com Escheric
Publicado em: 2009
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6. Effects of Grazing by the Free-Living Soil Amoebae Acanthamoeba castellanii, Acanthamoeba polyphaga, and Hartmannella vermiformis on Various Bacteria
Cultures of 10 different bacteria were used to serve as food sources for axenically grown Acanthamoeba castellanii, Acanthamoeba polyphaga, and Hartmannella vermiformis. The nonpigmented enterobacteriaceae Escherichia coli K-12 and Klebsiella aerogenes appeared to be excellent feed to all three amoebae. Hardly any growth or ammonium production was observed i
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7. Isolation and characterization of a cycloheximide-resistant mutant of Acanthamoeba castellanii Neff.
A cycloheximide-resistant mutant was isolated from the amoeba Acanthamoeba castellanii Neff. Drug resistance was found to be due to a ribosomal modification.
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8. Infection of Acanthamoeba castellanii with Mycobacterium bovis and M. bovis BCG and Survival of M. bovis within the Amoebae
Survival of Mycobacterium bovis after ingestion by protozoa would provide an environmental reservoir for infection of cattle. We have shown that M. bovis survived ingestion by Acanthamoeba castellanii. In contrast, two strains of M. bovis BCG did not survive well within Acanthamoeba.
American Society for Microbiology.
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9. Development of Colorimetric Microtiter Plate Assay for Assessment of Antimicrobials against Acanthamoeba
We have developed and optimized a 96-well microtiter plate assay, based on the reduction of alamarBlue, to assess the efficacies of much needed new antimicrobials against Acanthamoeba species. This assay has been optimized for determination of drug efficacy against two potentially pathogenic species, Acanthamoeba castellanii and Acanthamoeba polyphaga, and h
American Society for Microbiology.
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10. A quantitative method to evaluate neutralizer toxicity against Acanthamoeba castellanii.
A standard methodology for quantitatively evaluating neutralizer toxicity against Acanthamoeba castellanii does not exist. The objective of this study was to provide a quantitative method for evaluating neutralizer toxicity against A. castellanii. Two methods were evaluated. A quantitative microtiter method for enumerating A. castellanii was evaluated by a 5
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11. In Vitro Evaluation of the Effectiveness of the Macrolide Rokitamycin and Chlorpromazine against Acanthamoeba castellanii
The present study demonstrates the in vitro effectiveness of the macrolide rokitamycin and the phenothiazine compound chlorpromazine against Acanthamoeba castellanii. Growth curve evaluations revealed that both drugs inhibit trophozoite growth in dose- and time-dependent ways. The effects of both drugs when they were used at the MICs at which 100% of isolate
American Society for Microbiology.
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12. By Releasing ADP, Acanthamoeba castellanii Causes an Increase in the Cytosolic Free Calcium Concentration and Apoptosis in Wish Cells
The role played by soluble molecules that may participate in acanthamoebal cytopathogenicity has yet to be fully characterized. We demonstrate here that Acanthamoeba castellanii trophozoites constitutively release ADP in the medium. Cell-free supernatants prepared from A. castellanii, by interaction with specific P2y2 purinoceptors expressed on the Wish cell
American Society for Microbiology.