17 documents found, page 1 of 2

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The impact of efflux on reduced susceptibility to biocides and fluoroquinolone ...

Leal, Marta; Pomba, Constança; Morais, Catarina; Costa, Sofia Santos; Ramos, Bárbara; Couto, Isabel; Abrantes, Patrícia

Staphylococcus pseudintermedius is the main bacterial agent causing skin and soft tissue infections (SSTIs) in companion animals. The increasing resistance to antimicrobial compounds, associated with multidrug resistance phenotypes, poses a risk for the therapeutic control of skin infections caused by this pathogenic agent. Until now, efflux as a resistance mechanism has been overlooked for this species. The ai...


Biopreservation approaches to reduce Listeria monocytogenes in fresh vegetables

Ramos, Bárbara; Brandão, Teresa R. S.; Teixeira, Paula; Silva, Cristina L. M.

Two biopreservation approaches for fresh lettuce, rocket salad, parsley and spinach were studied. The potential of Pediococcus pentosaceus DT016, as a protective culture, to suppress Listeria monocytogenes in vegetables during storage was evaluated. The pathogen numbers in the vegetables inoculated with P. pentosaceus DT016 were significantly (p < 0.01) lower throughout the storage period and, at the last stora...


Patient-physician discordance in assessment of adherence to inhaled controller ...

Jácome, Cristina; Pereira, Ana Margarida; Almeida, Rute; Ferreira-Magalhaes, Manuel; Couto, Mariana; Araujo, Luís; Pereira, Mariana

We aimed to compare patient's and physician's ratings of inhaled medication adherence and to identify predictors of patient-physician discordance.


Influences of physicochemical stresses on injury and inactivation behaviour of ...

Miller, Fátima A.; Ramos, Bárbara; Gil, Maria M.; Brandão, Teresa R. S.; Teixeira, Paula; Silva, Cristina L. M.

Many minimally processed foods depend on a combination of inhibitory factors to reduce the hazard of foodborne illness. Therefore, inactivation of Listeria innocua was studied according to a 24 factorial experiment designed to draw conclusions about temperature (52.5 °C and 65.0 °C), pH (4.5 and 7.5), water activity (aw=0.95 and 0.99) and solute type (NaCl and glycerol) effects. Three different recovery media w...


Antilisterial active compound from lactic acid bacteria present on fresh iceber...

Ramos, Bárbara; Ferreira, Vânia; Brandão, Teresa R. S.; Teixeira, Paula; Silva, Cristina L. M.

Pediococcus pentosaceus DT016, a bacteriocin producing strain, was isolated from fresh lettuce. A protein with antilisterial activity (bacDT016), between 11 to 17 kDa, was identifi ed and characterized as the bioactive substance from the LAB culture. Highest bacteriocin production was noted after 15 h of growth. Antibacterial activity was affected by some enzymes and detergents, as well as by temperatures equal...


Balsamic vinegar from Modena: an easy effective approach to reduce Listeria mon...

Ramos, Bárbara; Brandão, Teresa R. S.; Teixeira, Paula; Silva, Cristina L.M.

The microbiological safety of fresh produce is a significant concern of consumers and industry. After applying at an inoculated level (6e7 log CFU/mL) of Listeria monocytogenes on Iceberg lettuce, the antilisterial properties of balsamic vinegar from Modena, white wine vinegar and acetic acid solutions were investigated. Different proportions of the vinegars, acetic acid (58.7 g/L), and deionized water were eva...


An accessible approach to reduce Listeria monocytogenes from lettuce

Ramos, Bárbara; Brandão, Teresa R. S.; Teixeira, Paula; Silva, Cristina L. M.


An accessible approach to reduce Listeria monocytogenes from lettuce

Ramos, Bárbara; Brandão, Teresa R. S.; Teixeira, Paula; Silva, Cristina L. M.


Comparison of recovery methods for the enumeration of injured Listeria innocua ...

Miller, Fátima A.; Ramos, Bárbara; Brandão, Teresa R.S.; Teixeira, Paula; Silva, Cristina L.M.

This study compares the feature of different media with the combination of selective with non-selective media in a TAL method for recovery of Listeria innocua cells exposed to thermal treatments. Experiments were conducted in broth at constant temperature (52.5 and 65.0 ºC) and pH (4.5 and 7.5) conditions, using NaCl or glycerol to adjust water activity to 0.95. Four different media were used in bacterial cell ...


Phenotypic and genotypic characterization of Staphylococcus aureus isolated fro...

Santos, Carla; Meireles, Helena; Ramos, Bárbara; Castro, Ana; Silva, Joana; Teixeira, Paula


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