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Results 401 - 450 of 814
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Piyasena P - - 2003
Prompted by concerns regarding outbreaks of food-borne illness which have occurred due to the consumption of commercial, nonpasteurized fruit juices contaminated with Escherichia coli O157:H7, the US Food and Drug Administration and Canadian Food Inspection Agency are considering several new safety standards to apply to fresh juices, including mandatory pasteurization ...
Aldus C F - - 2003
AIMS: The verotoxigenic Escherichia coli (VTEC) serotype most commonly associated with verotoxin (VT) production is O157:H7, but other serotypes have also been implicated in food-borne illness. These serotypes exhibit much greater genetic and biochemical diversity than E. coli O157:H7, making screening for all VTEC difficult. Here we describe development and ...
Reid Donald C - - 2003
The quality of private water supplies within Aberdeenshire sampled between 1992 and 1998 was analysed with respect to the presence of total coliforms (TC), faecal coliforms (FC), and nitrate. Of the approximately 1750 samples analysed, which included multiple samples from larger supply categories, the individual failure rate was 41%, 30% ...
Nishimura Masako - - 2003
A variable-pressure scanning electron microscopy (VP-SEM) with a cooling stage permits long hours of observation of water-containing specimens in their natural or close to natural state, without the conventional specimen preparations of fixation, dehydration, drying and metal coating. It reduces water vaporization and beam damage by keeping the specimens at ...
Richardson I R - - 2003
AIMS: To establish the microbiological quality of ready-to-eat stuffing from retail premises in the north-east of England. To establish threshold levels of bacteria in the product for acceptance as a ready-to-eat food. To determine the relationship between the microbiology of the product and production processes. METHODS AND RESULTS: A microbiological ...
Kaufman G E - - 2003
This study examined the variability in the levels of total and pathogenic Vibrio parahaemolyticus in individual oysters. Twenty oysters were collected on three occasions (in June, July, and September 2001) from a site near Mobile Bay, Ala. Ten of these oysters were tested immediately, and 10 were tested after 24 ...
Alexandre Marcela - - 2003
Shiga toxin-producing Escherichia coli are emerging as a significant source of food-borne infectious disease all over the world. Illness caused by Shiga toxin-producing E. coli can range from self limited, watery diarrhea to life-threatening manifestations such as hemorrhagic colitis, hemolytic uremic syndrome or thrombotic thrombocytopenic purpura and death. Shiga toxin-producing ...
Moore Ginny - - 2002
A rapid, instrument-free, hygiene monitoring system, based on protein detection, was assessed as a means to evaluate the cleanliness of food contact surfaces within four different food processing environments. Its performance was compared to that of both ATP bioluminescence and a traditional agar-based microbiological method. Each surface was sampled using ...
Aschner Michael - - 2002
Methylmercury (MeHg) epidemics and studies in fish-eating populations have provided invaluable insights into the neurotoxic sequelae of MeHg exposure. MeHg is a ubiquitous environmental contaminant, and its accumulation in the food chain will continue to pose health risks given anthropogenic and natural contamination. This review briefly addresses recent epidemiological data ...
Estrada-Garcia T - - 2002
The street-vended food industry provides employment and cheap ready-to-eat meals to a large proportion of the population in developing countries like Mexico, yet little is known about its role in the transmission of food borne diseases (FBD). Because of its wide consumption, street-vended chili sauces in Mexico are potential vehicles ...
Samadpour Mansour - - 2002
Shiga toxin-producing Escherichia coli (STEC) is increasingly recognized as a common cause of diarrhea. STEC infection is a major public health threat because of its ability to cause serious and potentially life-threatening illnesses. The main reservoirs of STEC are believed to be the intestinal tracts of animals. Several studies have ...
Grooters Amy M - - 2002
The purpose of this study was to evaluate the effects of sample handling, storage, and culture techniques on the isolation of Pythium insidiosum from infected equine tissues. Tissue and kunker samples obtained immediately posteuthanasia from a horse with subcutaneous pythiosis were used to assess the effects of sample type (kunkers ...
D'Haese Eva - - 2002
Solid-phase cytometry (SPC) is a novel technique that allows rapid detection of bacteria at the single cell level, without the need for a growth phase. After filtration of the sample, the retained microorganisms are fluorescently labeled on the membrane filter and automatically counted by a laser scanning device. Each fluorescent ...
Hozová B - - 2002
The work presents some results from the evaluation of microbiological (total bacterial count, coliform bacteria, moulds and yeasts) and sensory (shape, odour, colour, taste, consistency, crust, soft inside, etc.) quality and of the aw value and pH during the 90-day storage (interval of 0, 30, 45, 60, 75 and 90 ...
Gooch J A - - 2002
Oysters at the retail stage of distribution generally contain greater densities of Vibrio parahaemolyticus than do oysters at harvest. The objective of this study was to determine the effects of postharvest storage at 26 and 3 degrees C on the growth and survival of naturally occurring V. parahaemolyticus in shellstock ...
Cai Sheng Jian - - 2002
EnvZ, a histidine kinase/phosphatase in Escherichia coli, responds to the osmolarity changes in the medium by regulating the phosphorylation state of the transcription factor OmpR, which controls the expression levels of outer membrane porin proteins OmpF and OmpC. Although both ompR and envZ genes are located on the ompB locus ...
Tessi M A - - 2002
The purpose of this study was to evaluate the microbiological and sensory quality as well as the safety of ready-to-eat (RTE) cooked foods prepared in and distributed from a centralized kitchen to schools in Argentina. A total of 101 cooked food samples delivered as hot RTE cooked foods (group A) ...
Leclercq A - - 2002
A 24-h direct plating method for fecal coliform enumeration with a resuscitation step (preincubation for 2 h at 37 +/- 1 degrees C and transfer to 44 +/- 1 degrees C for 22 h) using fecal coliform agar (FCA) was compared with the 24-h standardized violet red bile lactose agar ...
Gill C O - - 2002
Manufacturing beef was pasteurized by immersion in water of 85 degrees C for 60 s, or was not pasteurized before being coarsely ground. The coarsely ground beef was vacuum-packaged and stored at 2 degrees C for up to 6 weeks. Before storage and at weekly intervals, three packs of pasteurized ...
Vachon J F - - 2002
Improving the microbiological safety of perishable foods is currently a major preoccupation in the food industry. The aim of this study was to investigate the inactivation of three major food pathogens (Listeria monocytogenes [LSD 105-1], Escherichia coli O157:H7 [ATCC 35150], and Salmonella enterica serotype Enteritidis ATCC [13047]) by dynamic high ...
Gomaa N F - - 2002
This study aimed to assess the microbiological quality of 90 frozen food samples (50 samples of raw frozen vegetables including molokeya, okra, green peas, peas + carrot, and artichoke, 20 of frozen poultry products and 20 of frozen meat products), and to assess the level of women practice during handling. ...
Beuchat L R - - 2002
AIMS: The aims of this study were (i) to determine the retention of viability of mycoflora removed from raw fruits, and how this affected diluents used to prepare samples for enumeration of propagules, and (ii) to evaluate the performance of recovery media for supporting colony development. METHODS AND RESULTS: Yeasts ...
Schets F M - - 2002
AIMS: The reference methods for enumeration of total coliforms and Escherichia coli as stated in the European Drinking Water Directive were compared with alternative methods. METHODS AND RESULTS: Laboratories used the reference method on Lactose TTC agar (LTTC), the Colilert/18 system, Laurysulphate Agar (LSA), Chromocult Coliform Agar and the E. ...
Murdock C A - - 2002
AIMS: To evaluate the antimicrobial activity in peptone yeast extract glucose (PYG) broth and ultra-high temperature (UHT) milk of bovine lactoferrin hydrolysate (LFH) with pepsin against the foodborne pathogens Salmonella Stanley, Escherichia coli, Listeria monocytogenes and Staphylococcus aureus. METHODS AND RESULTS: The LFH was suspended in PYG and the minimum ...
González Garcia E A - - 2002
The majority of interactions between microorganisms and animals are based on convenient relations for both of them. Symbiotic microorganisms, like intestinal microbiota, produce important vitamins for animals and protects them from putative pathogens. In general, for monogastric animals, the main contribution of intestinal microorganisms is to supply with growth factors ...
Mensah Patience - - 2002
OBJECTIVE: To investigate the microbial quality of foods sold on streets of Accra and factors predisposing to their contamination. METHODS: Structured questionnaires were used to collect data from 117 street vendors on their vital statistics, personal hygiene, food hygiene and knowledge of foodborne illness. Standard methods were used for the ...
Hjelm M - - 2002
AIMS: To compare the number of attached Shewanella putrefaciens on stainless steel with different silver surfaces, thus evaluating whether silver surfaces could contribute to a higher hygienic status in the food industry. METHODS AND RESULTS: Bacterial adhesion to three types of silver surface (new silver, tarnished silver and sulphide-treated silver) ...
Sagoo S K - - 2001
AIMS: A microbiological study of uncooked ready-to-eat organic vegetables was undertaken to determine the microbiological quality of these vegetables on retail sale in the UK. METHODS AND RESULTS: Organic vegetables were collected and examined according to a standardized protocol. The majority (3185 of 3200; 99.5%) of samples were found to ...
Lorca T A - - 2001
The objective of this study was to determine the effect of normal microflora and Morganella morganii on histamine formation and olfactory acceptability in raw bluefish under controlled storage conditions. Fillets inoculated with and without M. morganii were stored at 5, 10, and 15 degrees C for 7 days. Microbial isolates ...
Sullivan M M - - 2001
Hospital-prepared tube feedings from four Philippine acute-care hospitals were analysed for microbial contamination. Two feedings were prepared on three separate days at each hospital. The tube feedings were either blended natural whole foods or a reconstituted commercial powdered nutritional product. Samples of each feeding were collected for coliform count and ...
Taniwaki M H - - 2001
The efficacy of three culture media, dichloran rose bengal chloramphenicol (DRBC), dichloran 18% glycerol agar (DG18), and potato dextrose agar (PDA) supplemented with two antibiotics, were compared with the Simplate and Petrifilm techniques for mold and yeast enumeration. The following foods were analyzed: corn meal, wheat flour, cassava flour, bread ...
Knowles J - - 2001
The ability of natural compounds to inactivate foodborne organisms adhered to surfaces was investigated with the ultimate aim of replacing synthetic biocides by more environmentally friendly, natural alternatives. The antimicrobial efficacy of 0.5, 1.0, and 2.0% chitosan and Spor-Klenz RTU (a commercial biocide based on hydrogen peroxide and peroxyacetic acid) ...
Cakir I - - 2001
An assay to screen Escherichia coli in foods using MUG supplemented lauryl sulfate tryptose (LST) broth instead of tryptone water (TW) medium was evaluated. The results presented in this paper suggest that this method is more sensitive for lower levels of E. coli, faster (16-18 h vs. 6-10 days) and ...
Silbernagel K M - - 2001
A rehydratable dry-film plating method for Staphylococcus aureus in foods, the 3M Petrifilm Rapid S. aureus Count Plate method, was compared with AOAC Official Method 975.55 (Staphylococcus aureus in Foods). Nine foods-instant nonfat dried milk, dry seasoned vegetable coating, frozen hash browns, frozen cooked chicken patty, frozen ground raw pork, ...
Yamamoto S A - - 2001
It is common practice to dilute food products in 0.1% peptone before microbiological analysis. However, this diluent may not be appropriate for detection of injured organisms present in acidic foods. Shelf-stable unclarified apple juice (pH 3.6) was inoculated with approximately 1 x 10(7) CFU/ml of Escherichia coli O157:H7 and held ...
Toshima Y - - 2001
People wash their hands only for a short time outside the home and when preparing meals at home. This may not be sufficient for those who prepare meals because of possible secondary contamination from food. Although washing with a placebo soap for a short period (lathering 3 s and rinsing ...
Ogden I D - - 2001
AIMS: To compare media used in immunomagnetic separation (IMS) techniques for the isolation of Escherichia coli O157 from food. METHODS AND RESULTS: Foods, both naturally contaminated and spiked, with low numbers (< 1 g(-1)) of stressed E. coli O157 were enriched in media based on buffered peptone water (BPW), tryptone ...
Heredia N - - 2001
Eighty-eight samples of ground meat were randomly collected from retail stores in the metropolitan area of Monterrey, Mexico, and were analyzed for microbial contamination. Methods were those recommended by the Mexican regulation and/or the U.S. Food and Drug Administration. Over 75% of the samples contained > 10(5) total mesophilic microorganisms ...
Arias M L - - 2001
Escherichia coli O157: H7 has emerged as a new pathogen and is found worldwide. We studied the effect of several storage temperatures on the survival of this bacterium in common foods from a neotropical environment (Costa Rica) because at least seven clinical cases have been reported from the country, and ...
Paniagua E - - 2001
We analysed the influence of various bacteria on the in vitro growth of trophozoites of a Platyamoeba strain isolated from diseased gill tissues of cultured turbot. Little or no growth was shown by amoebae cultured in the presence of (1) the turbot-pathogenic bacteria Vibrio anguillarum, Aeromonas salmonicida or Streptococcus sp., ...
Phillips D - - 2001
A survey of the microbiological quality of beef carcasses and boneless beef produced in Australia was conducted during the period June to November 1998. Sponge samples were collected from 1,275 carcasses, and meat samples were drilled from 990 cartons of frozen boneless beef. Carcass and boneless beef samples were respectively ...
Raybourne R B - - 2001
E. coli O157:H7 is one of the more important food pathogens, andrapid, quantitative methods to evaluate foods for the presence of this pathogen are needed. This unit provides exactly that: a very much simplified flow cytometric assay for detection of E. coli O157:H7 in a well established vehicle of infection, ...
Corradini M G - - 2001
Industrial microbial count records usually form an irregular fluctuating time series. If the series is truly random or weakly autocorrelated, the fluctuations can be considered as the outcome of the interplay of numerous factors that promote or inhibit growth. These factors usually balance each other, although not perfectly, hence, the ...
Bird C B - - 2001
Five different food types were analyzed by the Reveal for E. coli O157:H7 8-Hour Test System (Reveal 8) and either the U.S. Food and Drug Administration's Bacteriological Analytical Manual (BAM) culture method or the U.S. Department of Agriculture Food Safety Inspection Service (FSIS) culture method for the presence of E. ...
McWilliam Leitch E C - - 2001
The high mortality rate associated with human infections caused by Escherichia coli strains of the serotype O157:H7 has brought to public attention the importance of ruminants as reservoirs of food-borne pathogens. In addition to established examples such as salmonella, campylobacter and listeria, recent evidence is emerging of the role of ...
Gabriel H M - - 2001
BACKGROUND: Mascara Life is a liquid additive that claims to reconstitute mascara consistency while retarding bacterial and fungal growth in tubes of used mascara. The purpose of this study was to compare the effectiveness of mascara alone versus mascara with the addition of Mascara Life against the growth of Staphylococcus ...
Peng L - - 2001
Reticulocyte counting using the Sysmex RAM-1 was evaluated. The results of 113 samples analysed on the Sysmex RAM-1 were compared with those from both flow cytometry (FCM) and a manual technique. Reticulocyte counting with the Sysmex RAM-1 showed excellent precision, with an overall coefficient of variance (CV) less than 5%, ...
Jagannath A - - 2001
The increasing popularity of traditional milk-based foods has placed emphasis on the need for microbial safety in food-chain establishments, as there are ample possibilities for foodborne pathogens to occur as postprocessing contaminants. The behavioral pattern of an enterotoxigenic strain of Escherichia coli D 21 introduced as a postprocessing contaminant in ...
Vonada M L - - 2001
The potential market for single-ribbed bellies and Boston butts in South Korea was characterized and quantitative selection criteria were identified for use by U.S. packers when selecting pork for export. South Korean retail meat market managers and traders/wholesalers in Seoul and Pusan were interviewed and asked to identify the quality ...
Leitner G - - 2001
The purpose of the present study was to examine the effect of apramycin sulphate on the colonization of pathogenic E. coli in the intestines of chicks. Apramycin treatment (0.5g/l in the drinking water) of 3-to 5-week-old Leghorn chicks for 24 or 48 hours resulted in a reduction, to an undetectable ...
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