Preliminary analysis of the lipase gene (gehM) expression of Staphylococcus xylosus in vitro and during fermentation of naturally fermented sausages (in situ) - (Journal of Food Protection®)
November 23, 2007 – 10:57 pmABSTRACT: Coagulase-negative catalase-positive cocci (CNCPC) play a very important role during the fermentation of sausages. In particular, they are involved in the aroma formation of the final product, because they release lipases that are able to free short-chain fatty acids that are contributing to the sensory characteristics of the fermented sausage. Few studies have been undertaken to elucidate the regulation of lipase gene expression in Staphylococcus xylosus by substrate molecules or products of lipolysis.
The aim of this study was to analyze the gehM gene expression of S. xylosus DSMZ 6179 in vitro with growth media containing different concentrations of lipids and in situ during the maturation of fermented sausages.
The results obtained suggest that a concentration that increases in triglycerides in the growth medium suppresses the expression of the lipase gene.
MORE:
http://www.extension.iastate.edu/foodsafety/news/fsnews.cfm?newsid=22759
Related posts:
ABSTRACT: Use of selected sourdough strains of lactobacillus for removing gluten and enhancing the nutritional properties of gluten-free bread - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1491-1495(5))
ABSTRACT: Inhibition of Escherichia coli O157:H7 in ripening dry fermented sausage by ground yellow mustard - (Journal of Food Protection)
Real-time PCR detection of Staphylococcus aureus in milk and meat using new primers designed from the heat shock protein gene htrA sequence - (Journal of Food Protection)
ABSTRACT: Transcription analysis of stx1, marA, and eaeA genes in Escherichia coli O157:H7 treated with sodium benzoate - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1469-1474(6))
Inhibition of Bacillus cereus in milk fermented with kefir grains - (Journal of Food Protection®)
ABSTRACT: Lytic activity of the recombinant staphylococcal bacteriophage FH5 endolysin active against Staphylococcus aureus in milk - (International Journal of Food Microbiology Volume 128, Issue 2, 10 December 2008, Pages 212-218)
ABSTRACT: Role of sigma B factor in the alkaline tolerance response of Listeria monocytogenes 10403S and cross-protection against subsequent ethanol and osmotic stress - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1481-1485(5))
Expression around the clock
US: Influence of autoinducer-2 (AI-2) and beef sample extracts on E. coli O157:H7 survival and gene expression of virulence genes yadK and hhA - (Blackwell Synergy)
ABSTRACT: Real-time PCR for quantitative detection of bovine tissues in food and feed - (Journal of Food Protection)
Association of prophage antiterminator Q alleles and susceptibility to food-processing treatments applied to Escherichia coli O157 in laboratory media - (Journal of Food Protection®, Volume 70, Number 11, November 2007 , pp. 2617-2619(3))
ABSTRACT: Survival of Bacillus cereus vegetative cells during Spanish-style fermentation of conservolea green olives - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1393-1400(8))
Species-specific identification of Penicillium linked to Patulin contamination - (Journal of Food Protection®)
A unique restriction site in the flaA gene allows rapid differentiation of group I and group II Clostridium botulinum strains by PCR-restriction fragment length polymorphism analysis - (Journal of Food Protection (Volume 70, Number 9, pp. 2133-2139))
SPROUTNET: Garbage in garbage out - (International Specialty Supply)
ABSTRACT: Evaluation of Escherichia coli O157:H7 internationalization into romaine lettuce tissues and detection of metabolic changes of internalized bacteria in response to bioavailable carbon using developed bioluminescent assay - (Purdue University)
ABSTRACT: Protein expression by Listeria monocytogenes grown on a RTE-meat matrix - (International Journal of Food Microbiology Volume 128, Issue 2, 10 December 2008, Pages 203-211)
ABSTRACT: Comparative effect of direct-fed microbials on fecal shedding of Escherichia coli O157:H7 and salmonella in naturally infected feedlot cattle - (Journal of Food Protection)
ABSTRACT: Enterotoxins and emetic toxins production by Bacillus cereus and other species of Bacillus isolated from Soumbala and Bikalga, African alkaline fermented food condiments - (International Journal of Food Microbiology Volume 124, Issue 3)
Variable number of tandem repeats and pulsed-field gel electrophoresis cluster analysis of Enterohemorrhagic Escherichia coli Serovar O157 strains - (Journal of Food Protection®, Volume 70, Number 11, November 2007 , pp. 2583-2588(6))
ABSTRACT: Effect of Inoculum preparation procedure and storage time and temperature on the fate of Listeria monocytogenes on inoculated salami - (Journal of Food Protection)
Safety assessment of dairy microorganisms: The Lactobacillus genus - (International Journal of Food Microbiology Vol. 126, Issue 3)
AUSTRALIA: Coles recalls sausages following metal contamination - (Scopical News/Data)
ARIZONA: The medium is the message: Manipulating salmonella in spaceflight curtails infectiousness - (Arizona State University)
Safety assessment of dairy microorganisms: Streptococcus thermophilus - (International Journal of Food Microbiology Vol 126, Issue 3)
Characterization of shiga toxigenic Escherichia coli isolated from foods - (Journal of Food Protection)
Safety assessment of dairy microorganisms: Propionibacterium and Bifidobacterium - (International Journal of Food Microbiology Vol. 126, Issue 3)
Cleaning and handling implements as potential reservoirs for bacterial contamination of some ready-to-eat foods in retail delicatessen environments - (Journal of Food Protection)
Death of Salmonella serovars, Escherichia coli O157:H7, Staphylococcus aureus and Listeria monocytogenes during the drying of meat: A case study using biltong and droewors - (Journal of Food Safety Vol. 28, Issue 2)
Bacteriophage-based enrichment coupled to Immunochromatographic strip-based detection for the determination of Salmonella in meat and poultry - (Journal of Food Protection®, Volume 70, Number 10, October 2007 , pp. 2235-2242(8))
UK: Continental sausages under the spotlight - (The Argus Lite)
NEW ZEALAND: People urged to heat cocktail sausages thoroughly - (Scoop)
Examination of Salmonella and Escherichia coli translocation from hog manure to forage, soil, and cattle grazed on the hog manure-treated pasture - (Journal of Environmental Quality)
ABSTRACT: A survey of bacteriological quality and the occurrence of Salmonella in raw bovine colostrum - (Foodborne Pathogens and Disease, 5(6): 853-858)
Potential of phenolic compounds for controlling lactic acid bacteria growth in wine - (Journal of Food Control, Volume 19, Issue 9)
Kraft patents new method for detecting listeria - (Food Innovation Weekly)
ABSTRACT: The potential influence of fruit polyphenols on colonic microflora and human gut health - (International Journal of Food Microbiology Volume 124, Issue 3)
KENTUCKY: Staph bacteria suspected in illnesses among Claudia Sanders patrons - (Courier Journal)
ABSTRACT: Spread of a large plasmid carrying the cpe gene and the tcp locus amongst Clostridium perfringens isolates from nosocomial outbreaks and sporadic cases of gastroenteritis in a geriatric hospital - (Epidemiology and Infection (2009), 137:108-113)
AUSTRALIA: Food safety under the spotlight - (Food Safety Autorid NSW)
ABSTRACT: Outbreaks where food workers have been implicated in the spread of foodborne disease. Part 4. Infective doses and pathogen carriage - (Journal of Food Protection, Volume 71, Number 11, pp. 2339-2373(35))
IRAC-sponsored public conference: Risk assessment, economic analysis, and foodborne illness regulations - (United States Department of Agriculture)
Decontamination of fluid milk containing Bacillus spores using commercial household products - (Journal of Food Protection)
ABSTRACT: Mathematically assessing the consequences of food terrorism scenarios - (Journal of Food Science Volume 73 Issue 7)
Prevalence of Escherichia coli O157:H7 in the AMERICAN bison (Bison bison) - (Journal of Food Protection®)
US: Fresh-cut lettuce in modified atmosphere packages stored at improper temperatures supports enterohemorrhagic E. coli isolates to survive gastric acid challenge - (Blackwell Synergy)
ABSTRACT: Oligosaccharide-mediated inhibition of the adhesion of pathogenic Escherichia coli strains to human gut epithelial cells in vitro - (Journal of Food Protection, Volume 71, Number 11, pp. 2272-2277(6))
ABSTRACT: Spoilage of blood sausages morcilla de Burgos treated with high hydrostatic pressure - (Journal of Food Microbiology, Volume 123, Issue 3)
Evaluation of nonpathogenic surrogate bacteria as process validation indicators for Salmonella enterica for selected antimicrobial treatments, cold storage, and fermentation in meat - (Journal of Food Protection®, Volume 71, Number 4, April 2008 , pp. 714-718(5))
The claim: Mayonnaise can increase the risk of food poisoning - (New York Times)
ABSTRACT: Development of TiO2 powder-coated food packaging film and its ability to inactivate Escherichia coli in vitro and in actual tests - (Journal of Food Microbiology, Volume 123, Issue 3)
Relationship between nitrate/nitrite reductase activities in meat associated staphylococci and nitrosylmyoglobin formation in a cured meat model system - (International Journal of Food )
Effects of essential oils of oregano and nutmeg on growth and survival of Yersinia enterocolitica and Listeria monocytogenes in barbecued chicken - (Journal of Food Protection®, Volume 70, Number 11, November 2007 , pp. 2626-2630(5))
NEW ZEALAND: Savs blamed for disease hitting six children - (Yahoo!xtra News)
Inhibition of food poisoning and pathogenic bacteria by Lactobacillus plantarum strain 2.9 isolated from ben saalga, both in a culture medium and in food - (Journal of Food Control, Volume 19, Issue 9)
ONTARIO: Health Hazard Alert - Dunn’s Famous brand Smoked Meat Pouches may contain a toxin produced by Staphylococcus bacteria - (Canadian Food Inspection Agency)
ABSTRACT: Are Staff Management Practices and inspection risk ratings associated with foodborne disease outbreaks in the catering industry in England and Wales? - (Journal of Food Protection)
INDIANA: Health department sued over inspection - (Herald Journal)
ABSTRACT: Sterility testing of a dispensing valve for aseptic function in food service applications - (Journal of Food Protection)
Microbiological quality of sushi from sushi bars and retailers - (Journal of Food Protection®, Volume 71, Number 4, April 2008 , pp. 860-864(5))
NORTH CAROLINA: NC gets federal funds for food safety research - (North Carolina News Network)
Survival and growth of Listeria monocytogenes in broth as a function of temperature, pH, and potassium lactate and sodium diacetate concentrations - (Journal of Food Protection®, Volume 70, Number 11, November 2007 , pp. 2620-2625(6))
ABSTRACT: A qualitative assessment of toxoplasma gondii risk in ready-to-eat smallgoods processing - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1442-1452(11))
Effectiveness of Trisodium Phosphate, Acidified Sodium Chlorite, Citric Acid, and Peroxyacids against pathogenic bacteria on poultry during refrigerated storage - (Journal of Food Protection (Volume 70, Number 9, pp. 2063-2071))
ABSTRACT: Microbial growth and the effects of mild acidification and preservatives in refrigerated sweet potato puree - (Journal of Food Protection)
ABSTRACT: A putative ABC transporter is involved in negative regulation of biofilm formation by Listeria monocytogenes - (Applied and Environmental Microbiology, p. 7675-7683, Vol. 74, No. 24)
WASHINGTON: AVMA declares preliminary victory on farm bill provisions - (American Veterinary Medical Association)
US: FDA Food Protection Plan shows significant progress - (FDA News)
ABSTRACT: Microbiological evaluation of stuffed mussels - (Journal of Food Protection)
Controlling Staphylococcus aureus on beef and sheep carcasses in Australia - (Food Protection Trends)
An outbreak of Escherichia coli O157:H7 infection in southern Sweden associated with consumption of fermented sausage; aspects of sausage production that increase the risk of contamination - (Cambridge Journals)
Interactions in dual species biofilms between Listeria monocytogenes EGD-e and several strains of Staphylococcus aureus - (International Journal of Food Microbiolgy (Volume 126, Issues 1-2, Pages 1-262))
ABSTRACT: Use of sensitivity analysis to aid interpretation of a probabilistic Bacillus cereus spore lag time model applied to heat-treated chilled foods (REPFEDs) - (International Journal of Food Microbiology (Volume 128, Issue 1, Pages 28-33 ))
BARFBLOG: Can TV cooks become food safety celebrities? or Have you spotted Doug Powell ranting? - (barfblog)
ABSTRACT: Production of the exopolysacchzrides by Streptococcus thermophilus: Effect of growth conditions on fermentation kinetics and intrinsic viscosity - (International Journal of Food Microbiology Volume 124, Issue 3)
Transcriptome analysis of organisms with food safety relevance - (Foodborne Pathogens and Disease Volume 5, Number 4)
MICHIGAN: Researchers confirm virulence differences in E coli O157:H7 strains - (CIDRAP News)
ABSTRACT: Fast real-time polymerase chain reaction for quantitative detection of Lactobacillus delbrueckii bacteriophages in milk - (Food Microbiology (Volume 25, Issue 8, Pages 978-982 ))
Safety assessment of dairy microorganisms: The Lactococcus genus - (International Journal of Food Microbiology Vol 126, Issue 3)
US: FDA releases Food Protection Plan progress report - (CleanRooms)
ABSTRACT: Individual effects of sodium, potassium, calcium, and magnesium chloride salts on Lactobacillus pentosus and Saccharomyces cerevisiae growth - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1412-1421(10))
UK: Health Protection Agency confirms salmonella investigation - (Salisbury Journal)
FDA has provided few details on the resources and strategies needed to implement its food protection plan - (GAO)
ABTRACT: Effectiveness of icing as a postharvest treatment for control of vibrio vulnificus and vibrio parahaemolyticus in the eastern oyster (crassostrea virginica) - (Journal of Food Protection, Volume 71, Number 7, July 2008 , pp. 1475-1480(6))
Testing the assertion that local food is best: the challenges of an evidencebased approach- - (Trends in Food Science & Technology, Volume 19, Issue 5, May 2008, Pages 265-274)
MICHIGAN: Bay City to study drinking water quality - (The Bay City Times)
Safety assessment of dairy microorganisms: Bacterial taxonomy - (International Journal of Food Microbiology Vol 126, Issue 3)
UK: Xmas lunch may have caused poisoning - (News and Star)
NEW JERSEY: Food poisoning - it’s the norwalk virus - (The Jersey Evening Post)
ABSTRACT: Effect of addition of Versagel® on microbial, chemical, and physical properties of low-fat yogurt - (Journal of Food Science Volume 73 Issue 7)
Number of Salmonella on chicken breast filet at retail level and its implications for public health risk - (Journal of Food Protection (Volume 70, Number 9, pp. 2045-2055))
WISCONSIN: Kwik Trip stressing food safety - (WKBT.com)
FEDERAL REGISTER: Food Protection Rapid Response Team and Program Infrastructure Improvement Prototype Project; Availability of an agreement of limited competition; Request for applications: RFA Number: RFA FD08-007 - (Federal Register (Volume 73, Number 126))
MICHIGAN: New technique puts DNA profiling of E. coli on fast track - (from a pres release)
U.S. unveils new food protection plan - (IFT Neutraceutical and Functional Foods Newsletter)
BARFBLOG: Greenhouse vegetable food safety: Watch those dirty boots - (barfblog)
Preliminary FoodNet data on the incidence of infection with pathogens transmitted commonly through food — 10 States, 2007 - (CDC)
Development of a sanitizing fabric wipe for use on food contact surfaces - (Journal of Food Science )
An outbreak of Escherichia coli O157 in Aberdeen, Scotland, September 2007 - (Eurosurveillance)
US: Dr. David A. Acheson appointed Interim CFSAN Director - (Center for Food Safety and Applied Nutrition)