Potencial probiótico de Enterococcus faecium isolados de queijo

The purpose of this work was to identify, assess and compare some Enterococcus faecium potential probiotic micro-organisms isolated from artisanal cheese in Londrina. First, identified by molecular techniques already isolated strains of Enterococcus. The rest of the tests were made only with isolate...

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Autor principal: Brandalize, Claudia Carneiro
Formato: Dissertação
Idioma: Português
Publicado em: Universidade Tecnológica Federal do Paraná 2017
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spelling riut-1-21582017-06-27T14:57:23Z Potencial probiótico de Enterococcus faecium isolados de queijo Brandalize, Claudia Carneiro Furlaneto-Maia, Luciana http://lattes.cnpq.br/6007117281861512 Furlaneto-Maia, Luciana Coelho, Alexandre Rodrigo Favero, Daniel Probióticos Micro-organismos Alimentos - Conservação Probiotics Microorganisms Food - Preservation CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS::TECNOLOGIA DE ALIMENTOS Tecnologia de Alimentos The purpose of this work was to identify, assess and compare some Enterococcus faecium potential probiotic micro-organisms isolated from artisanal cheese in Londrina. First, identified by molecular techniques already isolated strains of Enterococcus. The rest of the tests were made only with isolates of Enterococcus faecium. There was then a antibiogram forward to erythromycin 15 mg, 30 mg tetracycline and vancomycin 30 mg, checking the resistance or sensitivity of each isolate against these antibiotics. It was then performed simulation tests in vitro gastro-intestinal tract and compared with the commercial Lactobacillus acidophilus strain. To simulate the conditions in the mouth was performed to test for resistance to lysozyme, thus verifying its viability. Have to simulate conditions in the stomach was performed tolerance test in acid medium in cultivation. We evaluated the survival conditions simulating the small intestine, determining the viability of these micro-organisms against the pancreatin at pH 8.0. In the study of auto-aggregation, either isolated from E. faecium and a strain of commercial L.acidophilus were separately placed and the optical density verified of 540 nm. The results showed that the 98 Enterococcus, isolated from cheese, was 54.0% E. faecium, 39.8% E. faecalis and 6.2% Enterococcus spp. Regarding antimicrobial susceptibility were slightly resistant to the antibiotics tested, and 24.5% were resistant to erythromycin and 1.9% to tetracycline and vancomycin. Already in lysozyme resistance test after 120 min showed 15 isolates that had no significant difference at 5% when compared to L. acidophilus and 7 isolates were more resistant than the same. In result against acid stress after 3 h, 3 isolates showed no significant difference at 5% when compared with L. acidophilus and 2 isolates had greater resistance than Lactobacillus. Regarding testing survival to the small intestine, compared to commercial strain of L. acidophilus, presented with survival rates without significant difference, 21 isolates of E. faecium, and still can highlight the isolates 7 isolates, which found a higher survival rate than the control. 32 of the 53 isolates tested showed the ability to auto-aggregation, or 60%. Tendo em vista fazer uma verificação de algumas das características de microorganismos com potencial probiótico, esse trabalho tem por objetivo identificar, avaliar e comparar o potencial probiótico de Enterococcus faecium isolados de queijo artesanal da cidade de Londrina. Primeiramente foram identificadas por técnica molecular as cepas já isoladas de Enterococcus. O restante dos testes foram feitos somente com os isolados de Enterococcus faecium. Fez-se então, um antibiograma frente à eritromicina 15 µg, tetraciclina 30 µg e vancomicina 30 µg, verificando-se a resistência ou sensibilidade de cada isolado frente a estes antibióticos. Em seguida foram realizados testes de simulação in vitro do trato gastro-intestinal e comparados com a cepa comercial de Lactobacillus acidophilus. Para simular as condições na boca foi realizado o teste de resistência à lisozima, verificando assim a sua viabilidade. Já para simular as condições no estômago realizou-se o teste de tolerância em meio ácido, em cultivo. Foram avaliadas as condições de sobrevivência simulando o intestino delgado, determinando-se a viabilidade destes micro-organismos frente à pancreatina em pH 8,0. No estudo de auto-agregação, cada isolado de E. faecium e a cepa comercial de L. acidophilus, foram colocados separadamente e verificados em densidade óptica de 540 nm. Os resultados demonstraram que dos 98 isolados de Enterococcus, 54,0 % eram E. faecium, 39,8% eram E. faecalis e 6,2% eram Enterococcus spp. Em relação à susceptibilidade à antimicrobianos foram pouco resistentes aos antibióticos testados, sendo que 24,5% apresentaram resistência à eritromicina e 1,9% apresentaram resistência à tetraciclina e vancomicina. Já no teste de resistência à lisozima após 120 min obteve-se 15 isolados que não apresentaram diferença significativa ao nível de 5% quando comparados ao L. acidophilus e 7 isolados que foram mais resistentes que o mesmo. No resultado frente ao estresse ácido após 3 h, 3 isolados não apresentaram diferença significativa ao nível de 5 % quando comparados com L. acidophilus e 2 isolados apresentaram maior resistência que o Lactobacillus. Em relação ao teste sobrevivência ao intestino delgado, em comparação a cepa comercial de L. acidophilus, apresentaram-se com taxas de sobrevivência sem diferença significativa, 21 isolados de E. faecium, e ainda pode-se destacar 7 isolados, onde encontrou-se uma taxa de sobrevivência maior que o controle. Dos 53 isolados analisados 60 % apresentaram capacidade de auto-agregação. 2017-06-27T14:56:58Z 2017-06-27T14:56:58Z 2013-07-03 masterThesis BRANDALIZE, Claudia Carneiro. Potencial probiótico de Enterococcus faecium isolados de queijo. 2013. 70 f. Dissertação (Mestrado em Tecnologia de Alimentos) - Universidade Tecnológica Federal do Paraná, Campo Mourão, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/2158 por openAccess application/pdf Universidade Tecnológica Federal do Paraná Campo Mourao Medianeira Brasil Programa de Pós-Graduação em Tecnologia de Alimentos UTFPR
institution Universidade Tecnológica Federal do Paraná
collection RIUT
language Português
topic Probióticos
Micro-organismos
Alimentos - Conservação
Probiotics
Microorganisms
Food - Preservation
CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS::TECNOLOGIA DE ALIMENTOS
Tecnologia de Alimentos
spellingShingle Probióticos
Micro-organismos
Alimentos - Conservação
Probiotics
Microorganisms
Food - Preservation
CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS::TECNOLOGIA DE ALIMENTOS
Tecnologia de Alimentos
Brandalize, Claudia Carneiro
Potencial probiótico de Enterococcus faecium isolados de queijo
description The purpose of this work was to identify, assess and compare some Enterococcus faecium potential probiotic micro-organisms isolated from artisanal cheese in Londrina. First, identified by molecular techniques already isolated strains of Enterococcus. The rest of the tests were made only with isolates of Enterococcus faecium. There was then a antibiogram forward to erythromycin 15 mg, 30 mg tetracycline and vancomycin 30 mg, checking the resistance or sensitivity of each isolate against these antibiotics. It was then performed simulation tests in vitro gastro-intestinal tract and compared with the commercial Lactobacillus acidophilus strain. To simulate the conditions in the mouth was performed to test for resistance to lysozyme, thus verifying its viability. Have to simulate conditions in the stomach was performed tolerance test in acid medium in cultivation. We evaluated the survival conditions simulating the small intestine, determining the viability of these micro-organisms against the pancreatin at pH 8.0. In the study of auto-aggregation, either isolated from E. faecium and a strain of commercial L.acidophilus were separately placed and the optical density verified of 540 nm. The results showed that the 98 Enterococcus, isolated from cheese, was 54.0% E. faecium, 39.8% E. faecalis and 6.2% Enterococcus spp. Regarding antimicrobial susceptibility were slightly resistant to the antibiotics tested, and 24.5% were resistant to erythromycin and 1.9% to tetracycline and vancomycin. Already in lysozyme resistance test after 120 min showed 15 isolates that had no significant difference at 5% when compared to L. acidophilus and 7 isolates were more resistant than the same. In result against acid stress after 3 h, 3 isolates showed no significant difference at 5% when compared with L. acidophilus and 2 isolates had greater resistance than Lactobacillus. Regarding testing survival to the small intestine, compared to commercial strain of L. acidophilus, presented with survival rates without significant difference, 21 isolates of E. faecium, and still can highlight the isolates 7 isolates, which found a higher survival rate than the control. 32 of the 53 isolates tested showed the ability to auto-aggregation, or 60%.
format Dissertação
author Brandalize, Claudia Carneiro
author_sort Brandalize, Claudia Carneiro
title Potencial probiótico de Enterococcus faecium isolados de queijo
title_short Potencial probiótico de Enterococcus faecium isolados de queijo
title_full Potencial probiótico de Enterococcus faecium isolados de queijo
title_fullStr Potencial probiótico de Enterococcus faecium isolados de queijo
title_full_unstemmed Potencial probiótico de Enterococcus faecium isolados de queijo
title_sort potencial probiótico de enterococcus faecium isolados de queijo
publisher Universidade Tecnológica Federal do Paraná
publishDate 2017
citation BRANDALIZE, Claudia Carneiro. Potencial probiótico de Enterococcus faecium isolados de queijo. 2013. 70 f. Dissertação (Mestrado em Tecnologia de Alimentos) - Universidade Tecnológica Federal do Paraná, Campo Mourão, 2013.
url http://repositorio.utfpr.edu.br/jspui/handle/1/2158
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score 10,814766