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https://www.readbyqxmd.com/read/29222098/longitudinal-study-of-the-occurrence-persistence-and-contamination-routes-of-listeria-monocytogenes-genotypes-on-three-finnish-dairy-cattle-farms
#1
Hanna Castro, Anniina Jaakkonen, Marjaana Hakkinen, Hannu Korkeala, Miia Lindström
The molecular epidemiology of Listeria monocytogenes was investigated in a longitudinal study of three Finnish dairy farms during 2013 -- 2016. Totals of 186 bulk tank milk (BTM) samples, 224 milk filter socks (MFS), and 1702 samples of the barn environment were analyzed and isolates of L. monocytogenes were genotyped using pulsed-field gel electrophoresis. L. monocytogenes occurred throughout the year in all sample types, and the prevalence in MFS increased significantly during the indoor season. L. monocytogenes was more prevalent in MFS (29%) than in BTM samples (13%)...
December 8, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29214175/what-healthcare-workers-should-know-about-environmental-bacterial-contamination-in-the-intensive-care-unit
#2
REVIEW
Vincenzo Russotto, Andrea Cortegiani, Teresa Fasciana, Pasquale Iozzo, Santi Maurizio Raineri, Cesare Gregoretti, Anna Giammanco, Antonino Giarratano
Intensive care unit- (ICU-) acquired infections are a major health problem worldwide. Inanimate surfaces and equipment contamination may play a role in cross-transmission of pathogens and subsequent patient colonization or infection. Bacteria contaminate inanimate surfaces and equipment of the patient zone and healthcare area, generating a reservoir of potential pathogens, including multidrug resistant species. Traditional terminal cleaning methods have limitations. Indeed patients who receive a bed from prior patient carrying bacteria are exposed to an increased risk (odds ratio 2...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29210765/environmental-infection-prevention-priorities-of-patient-safety-collaboration
#3
Patti G Grota, Patti S Grant
Although progress has been made in decreasing health care-associated infections (HAI) in intensive care unit (ICU) patients, there has been an increase in HAI caused by drug-resistant pathogens, particularly those that contaminate the environment such as methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus, Pseudomonas spp, Acinetobacter spp, and Clostridium difficile. The ICU environment including sinks and medical equipment has been identified as being at risk for contamination and associated with cross-transmission of pathogens between the health care provider, the environment, and the patient...
January 2018: Critical Care Nursing Quarterly
https://www.readbyqxmd.com/read/29210075/noise-contamination-from-pet-blood-sampling-pump-effects-on-structural-mri-image-quality-in-simultaneous-pet-mr-studies
#4
Elizabeth Bartlett, Christine DeLorenzo, Ramin Parsey, Chuan Huang
PURPOSE: To fully quantify PET imaging outcome measures, a blood-sampling pump is often used during the PET acquisition. With simultaneous PET/MR studies, a structural magnetization-prepared rapid gradient-echo (MP-RAGE) may also be acquired while the pump is generating electromagnetic noise. This study investigated whether this noise contamination would be detrimental to the quantification of volume and cortical thickness measures obtained from automated segmentation of the MP-RAGE image...
December 6, 2017: Medical Physics
https://www.readbyqxmd.com/read/29203077/waste-wood-as-bioenergy-feedstock-climate-change-impacts-and-related-emission-uncertainties-from-waste-wood-based-energy-systems-in-the-uk
#5
Mirjam Röder, Patricia Thornley
Considering the urgent need to shift to low carbon energy carriers, waste wood resources could provide an alternative energy feedstock and at the same time reduce emissions from landfill. This research examines the climate change impacts and related emission uncertainties of waste wood based energy. For this, different grades of waste wood and energy application have been investigated using lifecycle assessment. Sensitivity analysis has then been applied for supply chain processes and feedstock properties for the main emission contributing categories: transport, processing, pelletizing, urea resin fraction and related N2O formation...
December 1, 2017: Waste Management
https://www.readbyqxmd.com/read/29202916/the-use-of-visual-examination-for-determining-the-presence-of-gluten-containing-grains-in-gluten-free-oats-and-other-grains-seeds-beans-pulses-and-legumes
#6
Laura K Allred, Cynthia Kupper, Channon Quinn
Obtaining representative test samples for antibody-based testing is challenging when analyzing whole grains for gluten. When whole grains are ground into flour for testing, confocal microscopy studies have shown that gluten tends to exist as aggregates within the starch background, making single-sample testing inaccurate and complicating the ability to arrive at an accurate average from multiple samples. In addition, whole-grain products present a unique risk to gluten free consumers, in that any contamination is localized to specific servings rather than being distributed across the product lot...
December 5, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/29196954/prevalence-of-human-parainfluenza-viruses-and-noroviruses-genomes-on-office-fomites
#7
Agata Stobnicka, Małgorzata Gołofit-Szymczak, Angelina Wójcik-Fatla, Violetta Zając, Joanna Korczyńska-Smolec, Rafał L Górny
The aim of this study was to evaluate the potential role of office fomites in respiratory (human parainfluenza virus 1-HPIV1, human parainfluenza virus 3-HPIV3) and enteric (norovirus GI-NoV GI, norovirus GII-NoV GII) viruses transmission by assessing the occurrence of these viruses on surfaces in office buildings. Between 2016 and 2017, a total of 130 surfaces from open-space and non-open-space rooms in office buildings located in one city were evaluated for HPIV1, HPIV3, NoV GI, and NoV GII viral RNA presence...
December 1, 2017: Food and Environmental Virology
https://www.readbyqxmd.com/read/29195414/a-high-precision-flat-crystal-spectrometer-compatible-for-ultra-high-vacuum-light-source
#8
Y Yang, J Xiao, D Lu, Y Shen, K Yao, C Chen, R Hutton, Y Zou
We report on a flat crystal spectrometer (FCS) featuring a differently pumped rotary feedthrough and double detectors connected to a crystal chamber by extendable bellows built at the Shanghai EBIT Laboratory. It was designed to overcome defects such as oil contamination, little distance from the detector to the crystal and others of an early FCS equipped at the same laboratory, but still keeps a large detectable angle range of detectors and brings new features and functions such as the Bond method measurement and double-crystal measurement which are based on the two-detector and large bellow design...
November 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29192494/regulated-and-unregulated-halogenated-flame-retardants-in-peregrine-falcon-eggs-from-greenland
#9
Katrin Vorkamp, Knud Falk, Soren Moller, Frank Rigét, Peter Borgen Sørensen
Median levels of regulated flame retardants, i.e. polybrominated diphenyl ethers (PBDEs), brominated biphenyl (BB) 153 and hexabromocyclododecane (HBCD) in 33-48 eggs of peregrine falcons (Falco peregrinus) from Greenland were 1900, 359 and 5.98 ng/g lipid weight (lw) and generally intermediate to levels in North America and Europe. Unregulated flame retardants had lower median concentrations of 1.06 (2-ethylhexyl-2,3,4,5-tetrabromobenzoate, EH-TBB), 2.42 (1,2-bis(2,4,6-tribromophenoxy)-ethane, BTBPE), 0.52 (2,4,6-tribromophenyl 2,3-dibromopropyl ether, DPTE) and 4...
December 1, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29190268/synthetic-cannabinoid-and-mitragynine-exposure-of-law-enforcement-agents-during-the-raid-of-an-illegal-laboratory-nevada-2014
#10
Loren Tapp, Jessica G Ramsey, Anita Wen, Roy Gerona
Synthetic cannabinoids (SCs), commonly known by the street name "Spice," are designer drugs of abuse that mimic the psychoactive effects of marijuana. Intentional SC use has resulted in multiple toxicities (1,2), but little is known about occupational SC exposure. After a federal agency's law enforcement personnel in Nevada reported irritability and feeling "high" after raiding illegal SC laboratories and processing seized SCs, a request for a health hazard evaluation was made by the agency to CDC's National Institute for Occupational Safety and Health (NIOSH) in 2014 to evaluate agents' occupational SC exposures...
December 1, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29180375/formation-and-characterization-of-early-bacterial-biofilms-on-different-wood-typologies-applied-in-dairy-production
#11
Margherita Cruciata, Raimondo Gaglio, Maria Luisa Scatassa, Giovanna Sala, Cinzia Cardamone, Marisa Palmeri, Giancarlo Moschetti, Tommaso La Mantia, Luca Settanni
Main hypothesis: Sicilian forestry resources are suitable for the production of equipment to be used in cheese making and indigenous milk lactic acid bacteria (LAB) are able to develop stable biofilms providing starter and non starter cultures necessary for curd fermentation and cheese ripening, respectively. Hence, the present work was carried out to evaluate LAB biofilm formation on different woods derived from trees species grown in Sicily with deproteinized whey. Microbiological and scanning electron microscopy analyses showed minimal differences in microbial levels and composition for the neoformed biofilms...
November 27, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29174193/environmental-and-body-contamination-from-cleaning-vomitus-in-a-health-care-setting-a-simulation-study
#12
Linh Phan, Yu-Min Su, Rachel Weber, Charissa Fritzen-Pedicini, Osayuwamen Edomwande, Rachael M Jones
BACKGROUND: Environmental service workers may be exposed to pathogens during the cleaning of pathogen-containing bodily fluids. METHODS: Participants with experience cleaning hospital environments were asked to clean simulated, fluorescein-containing vomitus using normal practices in a simulated patient room. Fluorescein was visualized in the environment and on participants under black lights. Fluorescein was quantitatively measured on the floor, in the air, and on gloves and shoe covers...
November 21, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/29173645/different-lactobacillus-populations-dominate-in-chorizo-de-le%C3%A3-n-manufacturing-performed-in-different-production-plants
#13
Narciso M Quijada, Francesca De Filippis, José Javier Sanz, María Del Camino García-Fernández, David Rodríguez-Lázaro, Danilo Ercolini, Marta Hernández
"Chorizo de Léon" is a high-value Spanish dry fermented sausage traditionally manufactured without the use of starter cultures, owing to the activity of a house-specific autochthonous microbiota that naturally contaminates the meat from the environment, the equipment and the raw materials. Lactic acid bacteria (particularly Lactobacillus) and coagulase-negative cocci (mainly Staphylococcus) have been reported as the most important bacterial groups regarding the organoleptic and safety properties of the dry fermented sausages...
April 2018: Food Microbiology
https://www.readbyqxmd.com/read/29173620/loop-mediated-isothermal-amplification-lateral-flow-dipstick-lamp-lfd-to-detect-toxoplasma-gondii-oocyst-in-ready-to-eat-salad
#14
Marco Lalle, Alessia Possenti, Jitender P Dubey, Edoardo Pozio
The apicomplexan parasite Toxoplasma gondii is the causative agent of toxoplasmosis, a foodborne zoonosis with a global distribution and estimated to cause up to 20% of the total foodborne disease burden in Europe. Association between T. gondii infection and the consumption of unwashed raw fruits and vegetables contaminated with oocysts has been reported and the increasing habit to eat pre-washed ready-to-eat salads poses a new potential risk for consumers. It is therefore important to trace the occurrence of potential contamination with this parasite to guarantee the safety of ready-to-eat vegetables...
April 2018: Food Microbiology
https://www.readbyqxmd.com/read/29173374/minimizing-sources-of-airborne-aerosolized-and-contact-contaminants-in-the-or-environment
#15
Donna Armellino
Surgical site infections are unintended consequences of surgery that can cause harm to patients and place financial burdens on health care organizations. Extrinsic factors in the OR-including health care providers' behavior and practices that modify air movement, the physical environment, equipment, or surgical instruments-can increase microbial contamination. Microbes can be transported into the surgical incision by airborne or contact routes and contribute to a surgical site infection. Simple practices to prevent infection-such as minimizing airborne particles and contaminants, maintaining equipment according to the manufacturer's recommendations, cleaning and disinfecting the environment and surgical instruments, and performing proper hand hygiene-can reduce the degree of microbial contamination...
December 2017: AORN Journal
https://www.readbyqxmd.com/read/29168446/a-randomized-trial-of-two-cover-gowns-comparing-contamination-of-healthcare-personnel-during-removal-of-personal-protective-equipment
#16
Thriveen S C Mana, Myreen E Tomas, Jennifer L Cadnum, Annette L Jencson, Christina T Piedrahita, Curtis J Donskey
In a randomized trial, a gown designed to allow easy removal at the neck and with increased skin coverage and snugness of fit at the wrist significantly reduced contamination of personnel during personal protective equipment (PPE) removal. Our results suggest that simple modifications of PPE can reduce contamination of personnel. Infect Control Hosp Epidemiol 2017;1-4.
November 23, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/29167773/prevalence-of-aflatoxin-contamination-in-herbs-and-spices-in-different-regions-of-iran
#17
Payam Khazaeli, Mitra Mehrabani, Mahmoud Reza Heidari, Gholamreza Asadikaram, Moslem Lari Najafi
Background: Mycotoxins are natural toxins, produced by several fungal species and are associated with morbidity or even mortality in animals, plants, and humans. In this study, 120 samples of herbs and spices in both bulk and packaged forms were prepared in order to measure aflatoxin level in different regions of Iran. Methods: The aflatoxin was extracted during Mar to May 2015, using 80% methanol and then purified via immunoaffinity column. Measurements were performed, using high-performance liquid chromatography, equipped with a fluorescence detection system at excitation and emission wavelengths of 365 and 435 nm, respectively...
November 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/29161268/nucleic-acid-purification-from-plants-animals-and-microbes-in-under-30-seconds
#18
Yiping Zou, Michael Glenn Mason, Yuling Wang, Eugene Wee, Conny Turni, Patrick J Blackall, Matt Trau, Jose Ramon Botella
Nucleic acid amplification is a powerful molecular biology tool, although its use outside the modern laboratory environment is limited due to the relatively cumbersome methods required to extract nucleic acids from biological samples. To address this issue, we investigated a variety of materials for their suitability for nucleic acid capture and purification. We report here that untreated cellulose-based paper can rapidly capture nucleic acids within seconds and retain them during a single washing step, while contaminants present in complex biological samples are quickly removed...
November 2017: PLoS Biology
https://www.readbyqxmd.com/read/29160720/effects-of-a-dry-ice-process-on-surface-and-carcase-decontamination-in-the-poultry-industry
#19
M Uyarcan, S Kayaardi
1. The objective of this study was to evaluate the effects of dry ice decontamination on equipment and carcase surfaces in a poultry slaughterhouse and to present an effective alternative method to the conventional decontamination processes. 2. Appreciable reductions occurred in total aerobic mesophilic bacterial counts of surface swab samples treated with dry ice (maximum difference 3.92 log CFU/100 cm(2)). 3. After dry ice treatment, Listeria spp. were detected on surfaces of pluckers and chiller cylinders whereas Salmonella spp...
November 21, 2017: British Poultry Science
https://www.readbyqxmd.com/read/29157193/effect-of-ventilation-velocity-on-hexavalent-chromium-and-isocyanate-exposures-in-aircraft-paint-spraying
#20
James Bennett, David Marlow, Fariba Nourian, James Breay, Amy Feng, Mark Methner
Exposure control system performance was evaluated during aircraft paint spraying at a military facility. Computational fluid dynamics (CFD) modeling, tracer gas testing, and exposure monitoring examined contaminant exposure versus crossflow ventilation velocity. CFD modeling using the RNG k-ϵ turbulence model showed exposures to simulated methyl isobutyl ketone of 294 and 83.6 ppm, as a spatial average of five worker locations, for velocities of 0.508 and 0.381 m/s (100 and 75 fpm) respectively. In tracer gas experiments, observed supply/exhaust velocities of 0...
November 20, 2017: Journal of Occupational and Environmental Hygiene
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