Ocorrência de micobactérias e outros microorganismos nas águas de uma fazenda produtora de leite de búfalas, na região de São Carlos, estado de São Paulo
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Data
2008-12-18
Autores
Jordão Junior, Cleso Mendonça [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Micobacterias ambientais (MA) ou micobactérias não-tuberculosas (MNT) estão relacionadas a uma grande variedade de doenças em seres humanos. As micobactérias ambientais são saprófitas comumente encontradas em todos os ecossistemas, incluindo água, solo, alimento, poeira e aerósóis. Particularmente, essas micobactérias podem se multiplicar em diferentes fontes de águas, como por exemplo águas de superfície, recreação, residuais, subterrâneas e de torneiras. Sistemas de encanamentos fornecedores de águas são rapidamente colonizados por micobactérias e assim os biofilmes formados nos canos d´água servem como fontes desses microrganismos. Micobactérias são resistentes contra a maioria dos desinfetantes usuais e podem tolerar grandes variações de pH e temperatura, o que lhes permite a permanência nos sistemas de distribuição de água por longos períodos de tempo. O objetivo desse estudo foi isolar e identificar MNT de amostras de água e biofilmes na canalização de água de uma fazenda produtora de leite de búfalas na região de São Carlos-SP e também avaliar a qualidade da água da propriedade por meio da contagem de microrganismos heterotróficos, coliformes totais e termotolerantes e Staphylococcus aureus.Das amostras analisadas, 90,5% das amostras foram classificadas como fora dos padrões em relação a coliformes totais e 69% foram classificadas como fora dos padrões em relação a coliformes termotolerantes. Trinta e duas amostras (76,3%) de um total de 42(100%) apresentaram populações acima de 500 UFC/mL para bactérias heterotróficas. S.aureus foram isolados em 9 amostras (32,14%) de um total de 28(100%). De um total de 33 (100%)MNT isoladas nesse trabalho, 12 (36,36%) foram isoladas de biofilmes presentes nos encanamentos de água da propriedade. Esses isolados foram posteriormente identificados usando a técnica do PRA (PCR- restriction enzyme...
Environmental mycobacteria (EM) or nontuberculosis mycobacteria (NTMs) are implicated in a variety of human diseases. They are common saprophytes in all ecosystems, including water, soil, food, dust, and aerosols. In particular, EM species can multiply in numerous water sources, including wastewater, surface water, recreational water, ground water, and tap water. Piped water supplies are readily colonized by mycobacteria, and thus the biofilm in the water pipes may serve as a reservoir for these organisms. Mycobacteria are resistant against common disinfectants and can tolerate wide ranges of pH and temperature, which allows them to persist in drinking water systems for long periods of time.The aim of this study was to isolate and identify NTMs from water samples and biofilms from a dairy buffalo farm in São Carlos city, State of Sao Paulo and to evaluate the water quality of the farm using heterotrophic, faecal and total coliforms count plates. Results showed that 90.5% of the samples were considered as being out of the standards related to total coliforms and 69% of the samples were classified as being out of the standards related to faecal coliforms. From a total of 42 (100%) samples, 32 (76,3%) presented populations above of 500 CFU/mL for heterotrophic bacteria. S.aureus were isolated in 9 samples (32,14%) from a total of 28(100%).Out of 33(100%) NTMs isolated in this work, 12 (36,36) were isolated from biofilms in water pipes. These isolates were further identified using PRA (PCR- restriction enzyme analysis), as well as 16S rDNA and hsp65 DNA sequencing, and mycolic acids by thin layer chromatography (TLC). Twenty-eighty species (84,84%) were identified as M. gordonae (18 isolates from water samples and 10 from biofilms), 2 (2,06%) M. lentiflavum (biofilms), 2 (2,06%)... (Complete abstract click electronic access below)
Environmental mycobacteria (EM) or nontuberculosis mycobacteria (NTMs) are implicated in a variety of human diseases. They are common saprophytes in all ecosystems, including water, soil, food, dust, and aerosols. In particular, EM species can multiply in numerous water sources, including wastewater, surface water, recreational water, ground water, and tap water. Piped water supplies are readily colonized by mycobacteria, and thus the biofilm in the water pipes may serve as a reservoir for these organisms. Mycobacteria are resistant against common disinfectants and can tolerate wide ranges of pH and temperature, which allows them to persist in drinking water systems for long periods of time.The aim of this study was to isolate and identify NTMs from water samples and biofilms from a dairy buffalo farm in São Carlos city, State of Sao Paulo and to evaluate the water quality of the farm using heterotrophic, faecal and total coliforms count plates. Results showed that 90.5% of the samples were considered as being out of the standards related to total coliforms and 69% of the samples were classified as being out of the standards related to faecal coliforms. From a total of 42 (100%) samples, 32 (76,3%) presented populations above of 500 CFU/mL for heterotrophic bacteria. S.aureus were isolated in 9 samples (32,14%) from a total of 28(100%).Out of 33(100%) NTMs isolated in this work, 12 (36,36) were isolated from biofilms in water pipes. These isolates were further identified using PRA (PCR- restriction enzyme analysis), as well as 16S rDNA and hsp65 DNA sequencing, and mycolic acids by thin layer chromatography (TLC). Twenty-eighty species (84,84%) were identified as M. gordonae (18 isolates from water samples and 10 from biofilms), 2 (2,06%) M. lentiflavum (biofilms), 2 (2,06%)... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Micobacterias - Teses, Agua - Teses, Microbiologia dos alimentos, Ácidos micólicos, Mycobacteria, Water, Sequencing, Mycolics acids, Biofilm
Como citar
JORDÃO JUNIOR, Cleso Mendonça. Ocorrência de micobactérias e outros microorganismos nas águas de uma fazenda produtora de leite de búfalas, na região de São Carlos, estado de São Paulo. 2008. 111 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, 2008.