42
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Producción de biofilme en genotipos de Staphylococcus aureus aislados de mastitis bovina en Cuba Translated title: Biofilm production of Staphylococcus aureus genotypes isolated from bovine mastitis in Cuba

      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

          Staphylococcus aureus es uno de los patógenos más importante de la mastitis bovina. La producción de biofilme por parte de las bacterias asociadas a las infecciones intramamarias, les confiere mayor capacidad de colonizar el tejido y de protección contra el sistema inmune y contra la acción de antimicrobianos. En este estudio, se trabajó con 98 aislados cubanos de S. aureus, previamente genotipados para la región X de la proteína A, colectados de cinco provincias de Cuba y se testaron para la producción de slime y biofilme. Se observó que el 98% de los aislados tuvieron algún tipo de producción de biofilme. Se considera que el método por tinción con Violeta Cristal utilizando placas de poliestireno es el método de elección, pues el método de producción de slime por siembra en medio con Rojo Congo no fue adecuado para inferir producción de biofilme por la aparición de gran cantidad de falsos negativos. Se determinó además que el genotipo t605 está asociado a la alta producción de biofilme, por lo que presenta un mayor potencial patogénico.

          Translated abstract

          Staphylococcus aureus is one of the major causes of bovine mastitis. Biofilm production by intramammary pathogens provides microorganisms a higher capacity to colonize the host tissue and protection against the host immune system and the protective action against antimicrobial agents. In this study, 98 S. aureus isolates were collected from five Cuban provinces; all isolates were tested for slime and biofilm formation, and the genetic background related to the polymorphic X-region of protein A was recorded. A high percent (98%) of Cuban isolates presented some biofilm production. These results suggest that microplate by Crystal Violet staining method for biofilm detection is the election method, since slime methodology by inoculation in Red Congo Medium is not useful for inferring biofilm production, due to a high false negative number of strains found. It was determined that t605 genotype it is associated to a high biofilm production, then a greater pathogenic potential should be expected.

          Related collections

          Most cited references46

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

          Typing of methicillin-resistant Staphylococcus aureus in a university hospital setting by using novel software for spa repeat determination and database management.

          The spa gene of Staphylococcus aureus encodes protein A and is used for typing of methicillin-resistant Staphylococcus aureus (MRSA). We used sequence typing of the spa gene repeat region to study the epidemiology of MRSA at a German university hospital. One hundred seven and 84 strains were studied during two periods of 10 and 4 months, respectively. Repeats and spa types were determined by Ridom StaphType, a novel software tool allowing rapid repeat determination, data management and retrieval, and Internet-based assignment of new spa types following automatic quality control of DNA sequence chromatograms. Isolates representative of the most abundant spa types were subjected to multilocus sequence typing and pulsed-field gel electrophoresis. One of two predominant spa types was replaced by a clonally related variant in the second study period. Ten unique spa types, which were equally distributed in both study periods, were recovered. The data show a rapid dynamics of clone circulation in a university hospital setting. spa typing was valuable for tracking of epidemic isolates. The data show that disproval of epidemiologically suggested transmissions of MRSA is one of the main objectives of spa typing in departments with a high incidence of MRSA.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            New method for detecting slime production by coagulase negative staphylococci.

            An alternative method for detecting the production of slime by coagulase negative staphylococci was compared with the routinely used Christensen method on 124 isolates of coagulase negative staphylococci from carriage sites, blood cultures, and infected peritoneal dialysis fluids. The alternative method requires the use of a specially prepared solid medium--brain heart infusion broth, supplemented with 5% sucrose, and Congo red stain. Of the 124 tests, there was complete agreement between methods in 107 and only one strain was clearly negative by Christensen's method while positive on Congo red agar. The Congo red method is rapid, sensitive, and reproducible and has the advantage that colonies remain viable on the medium. It is also not subject ot interbatch variation of media which sometimes affects the reproducibility of the Christensen method.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Role of biofilm-associated protein bap in the pathogenesis of bovine Staphylococcus aureus.

              Staphylococcus aureus is a common cause of intramammary infections, which frequently become chronic, associated with the ability of the bacteria to produce biofilm. Here, we report a relationship between the ability to produce chronic bovine mastitis and biofilm formation. We have classified bovine mastitis S. aureus isolates into three groups based on the presence of particular genetic elements required for biofilm formation: group 1 (ica(+) bap(+)), group 2 (ica(+), bap negative), and group 3 (ica negative, bap negative). Overall, animals naturally infected with group 1 and 2 isolates had a lower milk somatic cell count than those infected with isolates of group 3. In addition, Bap-positive isolates were significantly more able to colonize and persist in the bovine mammary gland in vivo and were less susceptible to antibiotic treatments when forming biofilms in vitro. Analysis of the structural bap gene revealed the existence of alternate forms of expression of the Bap protein in S. aureus isolates obtained under field conditions throughout the animal's life. The presence of anti-Bap antibodies in serum samples taken from animals with confirmed S. aureus infections indicated the production of Bap during infection. Furthermore, disruption of the ica operon in a bap-positive strain had no effect on in vitro biofilm formation, a finding which strongly suggested that Bap could compensate for the deficiency of the PIA/PNAG product (a biofilm matrix polysaccharide). Altogether, these results demonstrate that, in the bovine intramammary gland, the presence of Bap may facilitate a biofilm formation connected with the persistence of S. aureus.
                Bookmark

                Author and article information

                Journal
                rsa
                Revista de Salud Animal
                Rev Salud Anim.
                Centro Nacional de Sanidad Agropecuaria (La Habana, , Cuba )
                0253-570X
                2224-4700
                December 2013
                : 35
                : 3
                : 189-196
                Affiliations
                [01] Mayabeque orgnameCentro Nacional de Sanidad Agropecuaria (CENSA) orgdiv1Dirección de Salud Animal Cuba joan@ 123456censa.edu.cu
                Article
                S0253-570X2013000300007 S0253-570X(13)03500307
                02f2c59f-d439-43fe-8cc0-77abac23d16e

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 04 July 2013
                : 02 September 2013
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 33, Pages: 8
                Product

                SciELO Cuba

                Categories
                ARTÍCULOS ORIGINALES

                Staphylococcus aureus,slime,biofilm,genotipo Spa,Spa genotype,bovine mastitis,mastitis bovina,biofilme

                Comments

                Comment on this article

                Similar content551

                Cited by4

                Most referenced authors488