19
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Genetic heterogeneity of Escherichia coli strains isolated from raw milk, Minas Frescal cheese, and food handlers Translated title: Heterogeneidade genética de cepas de Escherichia coli isoladas de leite cru, queijo Minas Frescal e manipuladores

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          From February 2004 to March 2005, 140 samples of food handlers - hands and nostrils - (92), raw milk (24), and minas frescal cheese (24) were analyzed for the presence of Escherichia coli in a dairy processing plant of Goiás State. Forty-seven E. coli strains were obtained and compared by DNA macrorestriction patterns obtained from pulsed-field gel electrophoresis following XbaI restriction in order to investigate the possible sources of cheese contaminations. Based on PFGE genotyping, one strain isolated from food the hands of a handler and five strains isolated from raw milk were identical or closely related to six strains from cheese suggesting, in these cases, the probable source of E. coli contamination in cheeses. No strain isolated from the nostrils was related to those found in cheeses or milk strains. The results showed high diversity among the strains, demonstrating a lack of predominance of an endemic clone in the dairy plant. This paper highlights the usefulness of PFGE as an epidemiological tool for determining the source of E. coli contamination in the food industry.

          Translated abstract

          Durante um ano, de fevereiro de 2004 a março de 2005, 140 amostras retiradas das mãos e das narinas de manipuladores de alimentos (92), do leite cru (24) e do queijo-de-minas frescal (24) foram analisadas para a presença de Escherichia coli, em um laticínio do Estado de Goiás. As 47 cepas obtidas foram comparadas por macrorrestrição do DNA com enzima XbaI, seguida de eletroforese em gel em campo pulsado (PFGE), a fim de investigar as possíveis fontes de contaminação do queijo. Baseado na genotipagem pelo PFGE, uma cepa obtida do leite cru e cinco cepas obtidas dos manipuladores mostraram similaridade maior que 80% com seis cepas isoladas do queijo, denotando forte correlação genética entre elas e sugerindo, nestes casos, a fonte provável de contaminação do produto final. Nenhuma cepa isolada do nariz foi relacionada às isoladas do queijo ou do leite. Os resultados mostraram grande diversidade entre as cepas, demonstrando ausência de um clone endêmico no laticínio avaliado. Este estudo destaca a utilidade do PFGE como uma ferramenta importante em investigações epidemiológicas e na determinação de possíveis fontes de contaminação por E. coli na indústria de alimentos.

          Related collections

          Most cited references21

          • Record: found
          • Abstract: not found
          • Article: not found

          Clinical Microbiology Procedures Handbook

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Compendium of methods for the microbiological examination for foods

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Interpreting chromosomal DNA restriction patterns produced by pulsed-field gel electrophoresis: criteria for bacterial strain typing

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                abmvz
                Arquivo Brasileiro de Medicina Veterinária e Zootecnia
                Arq. Bras. Med. Vet. Zootec.
                Universidade Federal de Minas Gerais, Escola de Veterinária (Belo Horizonte )
                1678-4162
                October 2009
                : 61
                : 5
                : 1203-1209
                Affiliations
                [1 ] Universidade Federal de Goiás Brazil
                [2 ] Universidade Federal de Goiás Brazil
                [3 ] UFGUniversidade Federal de Santa Catarina
                Article
                S0102-09352009000500025
                10.1590/S0102-09352009000500025
                dca5b17c-df28-448c-b8d0-0ae60335aa21

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0102-0935&lng=en
                Categories
                VETERINARY SCIENCES

                General veterinary medicine
                Escherichia coli,pulsotypes,minas frescal cheese,raw milk,food handlers,PFGE,queijo Minas Frescal,leite cru,manipuladores

                Comments

                Comment on this article