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https://www.readbyqxmd.com/read/28231666/-an-outbreak-of-paratyphoid-fever-in-a-county-of-yunnan-province-2010-2011
#1
S K Wang, Z G Wang, X H Zhang, B Yang, Q Wu, B Kan, Y H Zhou, R S Yang, M Y Yan
Objective: To identify the source and to comment on control program regarding an outbreak of paratyphoid A fever in a county, through field studies. Methods: Descriptive epidemiological methods were adopted to describe the epidemiological characteristics of the outbreak, which occurred in Yuanjiang county, Yunan province between 2010-2011, China. Case-control study with environmental investigation was performed to identify related risk factors and pathogens while isolation and susceptibility on the suspected pathogens were conducted...
February 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28231169/an-evaluation-of-alternatives-to-nitrites-and-sulfites-to-inhibit-the-growth-of-salmonella-enterica-and-listeria-monocytogenes-in-meat-products
#2
Alexandre Lamas, José Manuel Miranda, Beatriz Vázquez, Alberto Cepeda, Carlos Manuel Franco
In recent years, the use of nitrites and sulfites as food preservatives has been a cause for concern due to the health problems that these additives can cause in humans. Natural products have been studied as an alternative, but most of them have hardly been applied in the food industry for technological and economic reasons. In this sense, organic salts such as sodium acetate are a good alternative due to their affordability. Thus, this study evaluated the capacity of sodium nitrite, sodium sulfite, a sodium acetate product (TQI C-6000), and chitosan to inhibit two important foodborne pathogens, Salmonella enterica and Listeria monocytogenes...
October 31, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28229618/the-first-description-of-the-extended-spectrum-beta-lactamase-blashv-12-gene-in-a-salmonella-monophasic-typhimurium-strain-isolated-from-acute-gastroenteritis-in-a-kidney-transplant-recipient-in-southeast-spain
#3
José Antonio Aparicio-Gómez, Silvia Herrera-López, José Gutiérrez-Fernández
Acute gastroenteritis (AGE) is a common disease within the population. Most cases are self-limited. However, intensive treatment is sometimes necessary to ensure patient integrity. This disease is characterized by vomiting and/or diarrhea with blood or mucus, discomfort, fever, and nonspecific abdominal pain. Commonly involved pathogens in the developed world include: viruses, bacteria, and parasites. In this paper we report a rare cause of AGE.
February 23, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28222764/occurrence-of-salmonella-spp-a-comparison-between-indoor-and-outdoor-housing-of-broilers-and-laying-hens
#4
Martin Wierup, Helene Wahlström, Elina Lahti, Helena Eriksson, Désirée S Jansson, Åsa Odelros, Linda Ernholm
BACKGROUND: Outdoor production of poultry is rapidly increasing, which could be associated with increased risks for exposure to different environmental sources of Salmonella. We report a comparison on the occurrence of Salmonella during 2007-2015 in broilers and laying hens in outdoor and indoor production subjected to the same requirements for the prevention and control of Salmonella as applied in Sweden. RESULTS: Our results give no indication that, during the period studied, the exposure to Salmonella in outdoor poultry production was higher than in the indoor production...
February 21, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28221986/induction-of-viable-but-nonculturable-salmonella-in-exponentially-grown-cells-by-exposure-to-a-low-humidity-environment-and-their-resuscitation-by-catalase
#5
Yuta Morishige, Atsushi Koike, Ai Tamura-Ueyama, Fumio Amano
Salmonella is a major cause of foodborne disease that sometimes occurs in massive outbreaks around the world. This pathogen is tolerant of low-humidity conditions. We previously described a method for induction of viable but nonculturable (VBNC) Salmonella enterica serovar Enteritidis by treatment with hydrogen peroxide (H2O2) and subsequent resuscitation with 0.3 mM sodium pyruvate. Here, we report a new method for the induction of the VBNC state in Salmonella Enteritidis cells, one involving dehydration. Exposure of Salmonella Enteritidis cells to dehydration stress under poor nutritional conditions (0...
February 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221969/development-and-validation-of-pathogen-environmental-monitoring-programs-for-small-cheese-processing-facilities
#6
Sarah M Beno, Matthew J Stasiewicz, Alexis D Andrus, Robert D Ralyea, David J Kent, Nicole H Martin, Martin Wiedmann, Kathryn J Boor
Pathogen environmental monitoring programs (EMPs) are essential for food processing facilities of all sizes that produce ready-to-eat food products exposed to the processing environment. We developed, implemented, and evaluated EMPs targeting Listeria spp. and Salmonella in nine small cheese processing facilities, including seven farmstead facilities. Individual EMPs with monthly sample collection protocols were designed specifically for each facility. Salmonella was detected in only one facility, with likely introduction from the adjacent farm indicated by pulsed-field gel electrophoresis data...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221968/isolation-identification-and-characterization-of-foodborne-pathogens-isolated-from-egg-internal-contents-in-china
#7
Zhao Ge, Song Xue, Zhao Jianmei, L I Yuehua, Wang Juan, Huang Xiumei, Q U Zhina, Wang Yudong, Yan Shigan, Wang Junwei
Eggs continue to be significant in terms of the world economy and human nutrition. The aim of this study was to estimate the prevalence of foodborne pathogens in a cross section of egg production types in China and to examine the virulence features of the isolated pathogens. Three hundred eggs from three provinces were tested for Salmonella , Escherichia coli , Staphylococcus aureus , and Campylobacter . Two eggs were positive for Salmonella , one was positive for both E. coli and S. aureus , and none were positive for Campylobacter ...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221963/prevalence-and-antimicrobial-resistance-of-enterobacteriaceae-in-shell-eggs-from-small-scale-poultry-farms-and-farmers-markets
#8
A Kilonzo-Nthenge, S N Nahashon, S Godwin, S Liu, D Long
Public health concerns over the emergence of antimicrobial resistant bacteria have increased recently. The purpose of this study was to investigate the prevalence of antimicrobial resistant Enterobacteriaceae in shell eggs purchased from small poultry farms and farmers' markets. A total of 504 eggs were pooled to make 252 composite samples, consisting of 2 eggs per composite. The microbial quality of shell eggs was determined by standard quantitative, biochemical, and PCR techniques. Susceptibility to 13 antimicrobial agents was determined by the Kirby-Bauer disk diffusion technique, and results were interpreted based on Clinical and Laboratory Standards Institute values...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221958/using-a-six-sigma-fishbone-analysis-approach-to-evaluate-the-effect-of-extreme-weather-events-on-salmonella-positives-in-young-chicken-slaughter-establishments
#9
John W Linville, Douglas Schumann, Christopher Aston, Stephanie Defibaugh-Chavez, Scott Seebohm, Lucy Touhey
A six sigma fishbone analysis approach was used to develop a machine learning model in SAS, Version 9.4, by using stepwise linear regression. The model evaluated the effect of a wide variety of variables, including slaughter establishment operational measures, normal (30-year average) weather, and extreme weather events on the rate of Salmonella -positive carcasses in young chicken slaughter establishments. Food Safety and Inspection Service (FSIS) verification carcass sampling data, as well as corresponding data from the National Oceanographic and Atmospheric Administration and the Federal Emergency Management Agency, from September 2011 through April 2015, were included in the model...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221949/growth-of-escherichia-coli-o157-h7-non-o157-shiga-toxin-producing-escherichia-coli-and-salmonella-in-water-and-hydroponic-fertilizer-solutions
#10
Angela Shaw, Kara Helterbran, Michael R Evans, Christopher Currey
The desire for local, fresh produce year round is driving the growth of hydroponic growing systems in the United States. Many food crops, such as leafy greens and culinary herbs, grown within hydroponics systems have their root systems submerged in recirculating nutrient-dense fertilizer solutions from planting through harvest. If a foodborne pathogen were introduced into this water system, the risk of contamination to the entire crop would be high. Hence, this study was designed to determine whether Escherichia coli O157:H7, non-O157 Shiga toxin-producing E...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221946/effect-of-power-levels-on-inactivation-of-escherichia-coli-o157-h7-salmonella-typhimurium-and-listeria-monocytogenes-in-tomato-paste-using-915-megahertz-microwave-and-ohmic-heating
#11
Sang-Soon Kim, Hye-Jung Sung, Hyo-Sun Kwak, In-Sun Joo, Jeong-Su Lee, Gwangpyo Ko, Dong-Hyun Kang
The effect of power levels on inactivation of Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in tomato paste was investigated using 915-MHz microwave heating (MW) and ohmic heating (OH). Heating uniformity, pathogen inactivation, and quality aspects were determined with 1.8-, 2.1-, 2.4-, and 3.0-kW MW and corresponding OH. GInaFit was used to analyze pathogen inactivation. The heating uniformity of MW-treated samples was inferior to that of OH-treated samples at low power levels of 1...
September 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221924/reductions-in-natural-microbial-flora-nonpathogenic-escherichia-coli-and-pathogenic-salmonella-on-jalapeno-peppers-processed-in-a-commercial-antimicrobial-cabinet-a-pilot-plant-trial
#12
Jeremy M Adler, Erin D Cain-Helfrich, Cangliang Shen
This experiment aimed to validate the use of antimicrobial solutions in a spray cabinet to inactivate natural microbial flora, nonpathogenic Escherichia coli , and Salmonella on jalapeno peppers. Jalapeno peppers, uninoculated or inoculated with a five-strain mixture of rifampin-resistant E. coli (3.9 log CFU/g) or novobiocin- and nalidixic acid-resistant Salmonella (4.2 log CFU/g), were passed through a commercial antimicrobial cabinet containing both a top and bottom bar spraying (1.38 bar and 2 liters/min) water, sodium hypochlorite (50 ppm), sodium hypochlorite with pH adjusted to 6...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221909/effect-of-temperature-and-nutrient-concentration-on-survival-of-foodborne-pathogens-in-deciduous-fruit-processing-environments-for-effective-hygiene-management
#13
Stacey Duvenage, Lise Korsten
Temperature and good sanitation practices are important factors for controlling growth of microorganisms. Fresh produce is stored at various temperatures to ensure quality and to prolong shelf life. When foodborne pathogens survive and grow on fresh produce at storage temperatures, then additional control strategies are needed to inactivate these pathogens. The aim of this study was to determine how temperatures associated with deciduous fruit processing and storage facilities (0.5, 4, and 21°C) affect the growth and/or survival of Escherichia coli O157:H7, Listeria monocytogenes , Salmonella enterica subsp...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221907/salmonella-presence-in-mandibular-mesenteric-and-subiliac-lymph-nodes-collected-from-sheep-and-goats-in-the-united-states
#14
Keelyn E Hanlon, Markus F Miller, Lacey M Guillen, Mindy M Brashears
Even though often underappreciated in the United States, meat derived from goats and lambs is a valuable global commodity. Although extensive studies have been conducted examining pathogen prevalence in beef, pork, and poultry species, less research is available about pathogen presence in small ruminants. Understanding the presence of Salmonella in small ruminants can influence processing method improvements for these species to minimize food safety risks. The objective of this study was to establish the Salmonella presence in lymph nodes from sheep (n = 311) and goats (n =357) in the United States...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221906/tracing-surrogates-for-enteric-pathogens-inoculated-on-hide-through-the-beef-harvesting-process
#15
Mariana Villarreal-Silva, Daniel P Genho, Irfan Ilhak, Lisa M Lucia, James S Dickson, Kerri B Gehring, Jeffrey W Savell, Alejandro Castillo
Multiple antimicrobial interventions have been validated for use during the beef postharvesting process. However, little has been done to determine the impact of the postharvest environment on pathogen contamination. In this study, surrogate microorganisms were used to simulate pathogen cross-contamination through the postharvest environment at three different abattoirs. At each abattoir, the brisket areas of 13 hide-on carcasses were inoculated after stunning, with a gelatin slurry containing a cocktail (~7 log CFU/ml) of fluorescent Escherichia coli biotype I...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221904/reduction-of-bacterial-pathogens-and-potential-surrogates-on-the-surface-of-almonds-using-high-intensity-405-nanometer-light
#16
Alison Lacombe, Brendan A Niemira, Joseph Sites, Glenn Boyd, Joshua B Gurtler, Breanna Tyrell, Melissa Fleck
The disinfecting properties of high-intensity monochromatic blue light (MBL) were investigated against Escherichia coli O157:H7, Salmonella , and nonpathogenic bacteria inoculated onto the surface of almonds. MBL was generated from an array of narrow-band 405-nm light-emitting diodes. Almonds were inoculated with higher or lower levels (8 or 5 CFU/g) of pathogenic E. coli O157:H7 and Salmonella , as well as nonpathogenic E. coli K-12 and an avirulent strain of Salmonella Typhimurium, for evaluation as potential surrogates for their respective pathogens...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221898/foodborne-disease-outbreaks-associated-with-organic-foods-in-the-united-states
#17
R Reid Harvey, Christine M Zakhour, L Hannah Gould
Consumer demand for organically produced foods is increasing in the United States as well as globally. Consumer perception often credits organic foods as being safer than conventionally produced foods, although organic standards do not directly address safety issues such as microbial or chemical hazards. We reviewed outbreaks reported to the Centers for Disease Control and Prevention's Foodborne Disease Outbreak Surveillance System where the implicated food was reported to be organic. Information collected for each outbreak included the year, state, number of illnesses, pathogen, and implicated food...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221891/microbial-quality-safety-and-pathogen-detection-by-using-quantitative-pcr-of-raw-salad-vegetables-sold-in-dhanbad-city-india
#18
Sujeet K Mritunjay, Vipin Kumar
Consumption of ready-to-eat fresh vegetables has increased worldwide, with a consequent increase in outbreaks caused by foodborne pathogens. In the Indian subcontinent, raw fresh vegetables are usually consumed without washing or other decontamination procedures, thereby leading to new food safety threats. In this study, the microbiological quality and pathogenic profile of raw salad vegetables was evaluated through standard protocols. In total, 480 samples (60 each of eight different salad vegetables) of cucumber, tomato, carrot, coriander, cabbage, beetroot, radish, and spinach were collected from different locations in Dhanbad, a city famous for its coal fields and often called the "Coal Capital of India...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221887/soil-type-soil-moisture-and-field-slope-influence-the-horizontal-movement-of-salmonella-enterica-and-citrobacter-freundii-from-floodwater-through-soil
#19
Mary Theresa Callahan, Shirley A Micallef, Robert L Buchanan
Pathogens in soil are readily mobilized by infiltrating water to travel downward through the soil. However, limited data are available on the horizontal movement of pathogens across a field. This study used a model system to evaluate the influence of soil type, initial soil moisture content, and field slope on the movement of Salmonella enterica serovar Newport across a horizontal plane of soil under flooding conditions. Three soil types of varying clay content were moistened to 40, 60, or 80% of their maximum water-holding capacities and flooded with water containing 6 log CFU/ml Salmonella Newport and Citrobacter freundii , the latter being evaluated as a potential surrogate for S...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221883/enrichment-amplification-and-sequence-based-typing-of-salmonella-enterica-and-other-foodborne-pathogens
#20
Tom Edlind, Jeffrey D Brewster, George C Paoli
Detection of Salmonella enterica in foods typically involves microbiological enrichment, molecular-based assay, and subsequent isolation and identification of a pure culture. This is ideally followed by strain typing, which provides information critical to the investigation of outbreaks and the attribution of their sources. Pulsed-field gel electrophoresis is the "gold standard" for S. enterica strain typing, but its limitations have encouraged the search for alternative methods, including whole genome sequencing...
January 2017: Journal of Food Protection
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