Free Living Amoebae
Mostrando 1-12 de 57 artigos, teses e dissertações.
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1. Potentially pathogenic Acanthamoeba genotype T4 isolated from dental units and emergency combination showers
BACKGROUND Acanthamoeba is the genus of free-living amoebae that is most frequently isolated in nature. To date, 20 Acanthamoeba genotypes have been described. Genotype T4 is responsible for approximately 90% of encephalitis and keratitis cases. Due to the ubiquitous presence of amoebae, isolation from environmental sources is not uncommon; to determine the
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-12
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2. Presence of rotavirus and free-living amoebae in the water supplies of Karachi, Pakistan
ABSTRACT Rotavirus and pathogenic free-living amoebae are causative agents of important health problems, especially for developing countries like Pakistan where the population has limited access to clean water supplies. Here, we evaluated the prevalence of rotavirus and free-living amoebae (Acanthamoeba spp., Balamuthia mandrillaris, Naegleria fowleri) in dr
Rev. Inst. Med. trop. S. Paulo. Publicado em: 01/06/2017
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3. Isolamento e caracterização de Acanthamoeba spp. em água de torneira no Estado do Rio Grande do Sul / Isolation and characterization of Acanthamoeba spp. In tap water in the state of Rio Grande do Sul
Amebas de vida livre (AVL) do gênero Acanthamoeba estão amplamente distribuídas no ambiente e podem tornar-se amebas patogênicas ao homem. O objetivo deste trabalho foi isolar em de água de torneira amebas de vida livre do gênero Acanthamoeba, identificá-las e classificá-las. Um total de 132 amostras de água de torneira foi coletado de escolas estad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Isolamento e identificação de amebas de vida livre potencialmente patogênicas em amostras de ambientes de hospital público da cidade de Porto Alegre-RS / Isolation and identification of potentially pathogenic free-living amoebae in samples from environments in a public hospital in the city of Porto Alegre, Rio Grande do Sul
Um estudo sobre a presença de amebas de vida livre em um hospital público foi desenvolvido na Cidade de Porto Alegre, RS. Poeira e biofilmes de 15 ambientes hospitalares, incluindo CTI, UTI pediátrica, cozinha, emergência, centro cirúrgico ambulatorial e centro cirúrgico, reservatórios de água, torneira e 6 bebedouros coletivos foram coletados mensal
Publicado em: 2010
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5. Prevalence of potentially pathogenic free-living amoebae from Acanthamoeba and Naegleria genera in non-hospital, public, internal environments from the city of Santos, Brazil
Acanthamoeba and Naegleria species are free-living amoebae (FLA) found in a large variety of natural habitats. The prevalence of such amoebae was determined from dust samples taken from public non-hospital internal environments with good standards of cleanliness from two campuses of the same University in the city of Santos (SP), Brazil, and where young and
Brazilian Journal of Infectious Diseases. Publicado em: 2009-12
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6. 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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7. Immunity to pathogenic free-living amoebae: role of cell-mediated immunity.
The role of cell-mediated immunity in defense against pathogenic free-living amoebae was examined. Both the in vitro macrophage inhibition test and the in vivo delayed hypersensitivity test showed responses to both heterologous and homologous antigens, although homologous systems were the most efficient. It is suggested that exposure to nonpathogenic species
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8. Microorganisms Resistant to Free-Living Amoebae
Free-living amoebae feed on bacteria, fungi, and algae. However, some microorganisms have evolved to become resistant to these protists. These amoeba-resistant microorganisms include established pathogens, such as Cryptococcus neoformans, Legionella spp., Chlamydophila pneumoniae, Mycobacterium avium, Listeria monocytogenes, Pseudomonas aeruginosa, and Franc
American Society for Microbiology.
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9. Immunity to pathogenic free-living amoebae: role of humoral antibody.
Pathogenic free-living amoebae are common in nature, but few clinical infections by these amoebae have been reported. This has prompted studies of host susceptibility factors in humans. A survey of normal human sera from three New Zealand Health Districts was made; antibodies to pathogenic free-living amoebae were found in all sera, with titers ranging from
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10. Application of flow cytometry to studies of pathogenic free-living amoebae.
Species of small, free-living amoebae of the genera Naegleria and Acanthamoeba can cause fatal amoebic meningoencephalitis. Previous investigations have shown that pathogenic amoebae are associated with thermally altered water. Flow cytometric techniques for identifying species of pathogenic and nonpathogenic amoebae from such water have been developed, usin
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11. Elastase in the pathogenic free-living amoebae Naegleria and Acanthamoeba spp.
The data showed that pathogenic free-living amoebae contain the proteolytic enzyme elastase. The levels of enzyme were similar in Naegleria fowleri, N. australianis italica, and Acanthamoeba culbertsoni A-1. No difference was found between elastase levels in a highly pathogenic N. fowleri and those in the same organism which had lost pathogenicity as a resul
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12. Use of cell cultures as an indicator of pathogenicity of free-living amoebae.
Results comparing the time needed for the development of cytopathic effects in cell cultures with that needed to cause death in mice using inocula of Naegleria and Acanthamoeba are presented. The significance of the source and concentration of the inocula is demonstrated. The use of cell cultures as an indicator of the pathogenicity of free-living amoebae is