Showing papers in "International Journal of Food Microbiology in 2001"

TL;DR: Toxicity data exist for only a few bacteriocins, but research and their long-time intentional use strongly suggest that bacteriOCins can be safely used.

TL;DR: Electron microscopy showed that chitosan caused extensive cell surface alterations and covered the OM with vesicular structures, explaining the loss of the barrier function of the outer membrane, which makes chitOSan a potentially useful indirect antimicrobial for food protection.

TL;DR: The data obtained from the study of the bactericidal effect of oregano essential oil indicated that the major part of the species was irreversibly inactivated, i.e. they could not be revived by enrichment.

TL;DR: Analysis of unpublished data about food-borne disease outbreaks, listeriosis excluded, collected by the coordinator of the French surveillance system from 1992 to 1997 revealed 69 documented outbreaks for which milk and milk products were confirmed as the vehicle by the isolation of the etiologic agent.

TL;DR: A standardized molecular subtyping protocol for subtyped Listeria monocytogenes that was recently added to PulseNet is described and can be completed within 30 h from the time a pure culture of the bacteria is obtained.

TL;DR: The sensitivity of the biofilm cells grown on these surfaces to different levels of two sanitizers namely hypochlorite and iodophor for varying exposure times was studied and offered greater resistance when compared to their planktonic counterparts.

TL;DR: The inhibitory molecules secreted into the spent media by these strains were partially affected by treatments with lactate dehydrogenase, trypsin and proteinase K suggesting that overall inhibition may be due to a synergistic action of lactic acid and proteinaceous substances.

TL;DR: A simple screening method has been developed for detecting ochratoxin production by fungi, based on high-performance liquid chromatographic determinations on extracts obtained from agar plugs cut from pure Petri dish cultures, which provides quantitative information on the level of ochRatoxin produced by the cultures.

TL;DR: Compared honeys from six floral sources for their inhibitory activity against Escherichia coli O157:H7, Salmonella typhimurium, Shigella sonnei, Listeria monocytogenes, Staphylococcus aureus, and Bacillus cereus, it was revealed that darker colored honeys were generally more inhibitory than lightcolored honeys, and contained higher antioxidant power.

TL;DR: Using this method, even small amounts of SE can be recovered and immunologically analyzed by Western blotting or by ELISA with a very low background, and has the potential to be a general method for the preparation of samples used for analysis of SEs.

TL;DR: A double coupling bioreactor system was used to fast screen yeast strains for the production of acetate esters and non-Saccharomyces wine yeast and S. cerevisiae strains were found to be strong producers of 2-phenylethyl acetate and isoamyl acetates, respectively.

TL;DR: The results obtained for biogenic amine production by bacteria in a synthetic medium suggest that amino acid-decarboxylase activity is strain dependent rather than being related to specific species.

TL;DR: This work confirms that the main biological feature influencing the biogenic amine formation is the extent of growth of microorganisms, like E. faecalis, characterised by decarboxylase activity.

TL;DR: The chemical composition is discussed with particular reference to the proximate composition, the amino acid content and profile, as well as the volatile flavour components of various types of sufu.

TL;DR: It can be concluded that carvacrol can be added to food products at doses below the MIC value, thereby reducing the risk of toxin production by B. cereus and increasing the safety of the products.

TL;DR: An evaluation of various lactic acid bacteria for the fermentation of cabbage, carrot and beet-based vegetable products was carried out, and the selection process enabled the preparation of a mixed culture that was more rapid than the silage inoculants in acidifying the medium and was more effective in reducing the production of gas during the fermentation and storage of the fermented vegetables.

TL;DR: The HOA can be applied as an alternative for low O2 modified atmospheres for some specific types of ready-to-eat vegetables, sensitive to enzymatic browning and spoilage by yeasts, and high O2 atmospheres were found to be particularly effective in inhibiting enzyme browning of the tested vegetables.

TL;DR: A microbial map of the 25 sourdoughs was plotted showing characteristic associations among lactic acid bacteria and differences in the lactic Acid bacteria species which were mainly due to the species of wheat flour, use of bakers yeast and type of bread.

TL;DR: Molecular epidemiological studies of E. coli O157:H7 have demonstrated that subtypes of the organism can persist on cattle farms for years, thus supporting a conclusion that cattle farms represent a reservoir, but it is not completely clear that cattle themselves are the reservoir.

TL;DR: Comparison of data with past surveys seems to indicate that contamination of red smear soft cheese with L. monocytogenes has not decreased sufficiently over the past 15 years, and it is therefore strongly recommended that these products are monitored carefully by cheese-making companies.

TL;DR: The majority of E. coli O157 strains, from animals, carcasses and meat samples, were isolated during the summer, and most were verocytotoxigenic as determined by Vero cell assay and DNA hybridisation, eaeA gene positive and contained a 92 kb plasmid.

TL;DR: The increasing knowledge of gene sequences and the concomitant development of new culture-independent molecular techniques are providing new and effective tools to compare the diversity of microbial communities and to monitor population dynamics in minimally disturbed samples.

TL;DR: The extent to which interaction between yeasts and bacteria contribute to the final product is discussed and Yeasts that possess the proper physiological attributes to counteract the specific ecological determinants will be favored.

TL;DR: Hydrogen peroxide, at approximately 10,000-fold higher concentration, was less effective than ozone against Bacillus spores, and resistance of spores to ozone was highest for Bacillus stearothermophilus and lowest for B. cereus.

TL;DR: Although Aeromonas species are frequently detected in organic vegetables, the absence of accepted enteric pathogens was encouraging, and does not support the allegation of organic foods being of high risk due to the farming methods used.

TL;DR: A total of 15 samples of traditional fermented milk were collected from individual households in South Africa and Namibia, and lactic acid bacteria dominated the microflora of these samples, especially the genera Leuconostoc, Lactococcus and Lactobacillus.

TL;DR: Comparison of the amino acid sequence of plantaricin C19, with the sequence of some other anti-Listeria bacteriocins produced with lactic acid bacteria, revealed that it has in its N-terminal region the consensus sequence--YYGNGL--(uniquely with Valine instead of Leucine as found in all other bacteriOCins), identifying Plantaric in C19 as a pediocin-like bacteriokin.

TL;DR: The sensitivity and specificity of nucleic acid microarrays for detecting and genotyping E. coli O157:H7 were examined, with a glass-based array being found to be 32-fold more sensitive than gel electrophoresis and capable of detecting amplification products from < 1 cell equivalent of genomic DNA.

TL;DR: Survival of yeast cells was increased from 0.2% to 30-40% by using appropriate protective media containing combinations of skim milk and other protectants such as 5% or 10% lactose or glucose, and 10% fructose or sucrose.

TL;DR: The physiological function of EPS produced by Lactococcus lactis was studied by comparing the tolerance of the non-EPS producing strain L. cremoris MG1614 and an EPS producing isogenic variant of this strain to several anti-microbial factors.