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https://www.readbyqxmd.com/read/28549275/understanding-the-relationships-between-water-quality-recreational-fishing-practices-and-human-health-in-phoenix-arizona
#1
E Pulford, B A Polidoro, M Nation
Across the United States, recreational freshwater fisheries are not only an important leisure activity, but can also provide a relatively inexpensive source of protein in local diets. However, recreational freshwater fisheries are generally not well-monitored in terms of fish consumption vs. catch and release, nor are all recreational surface waters regularly monitored for the presence of potentially harmful contaminants in water or fishes. In six urban lakes that support recreational fisheries in Phoenix, Arizona, a majority of surveyed anglers reported eating recreationally caught fishes, even though they thought the water might be polluted...
May 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28538189/evaluation-of-methods-to-sample-fecal-indicator-bacteria-in-foreshore-sand-and-pore-water-at-freshwater-beaches
#2
Laura J Vogel, Thomas A Edge, Denis M O'Carroll, Helena M Solo-Gabriele, Caitlin S E Kushnir, Clare E Robinson
Fecal indicator bacteria (FIB) are known to accumulate in foreshore beach sand and pore water (referred to as foreshore reservoir) where they act as a non-point source for contaminating adjacent surface waters. While guidelines exist for sampling surface waters at recreational beaches, there is no widely-accepted method to collect sand/sediment or pore water samples for FIB enumeration. The effect of different sampling strategies in quantifying the abundance of FIB in the foreshore reservoir is unclear. Sampling was conducted at six freshwater beaches with different sand types to evaluate sampling methods for characterizing the abundance of E...
May 9, 2017: Water Research
https://www.readbyqxmd.com/read/28520707/using-molecular-characterization-to-support-investigations-of-aquatic-facility-associated-outbreaks-of-cryptosporidiosis-alabama-arizona-and-ohio-2016
#3
Michele C Hlavsa, Dawn M Roellig, Matthew H Seabolt, Amy M Kahler, Jennifer L Murphy, Taishayla K McKitt, Evelyn F Geeter, Ron Dawsey, Sherri L Davidson, Thuy N Kim, Theresa H Tucker, Sally Ann Iverson, Brenna Garrett, Nicole Fowle, Jennifer Collins, Gregory Epperson, Scott Zusy, Joli R Weiss, Ken Komatsu, Edwin Rodriguez, J Gage Patterson, Rebecca Sunenshine, Brandi Taylor, Katie Cibulskas, Lynn Denny, Keoni Omura, Boris Tsorin, Kathleen E Fullerton, Lihua Xiao
Cryptosporidiosis is a nationally notifiable gastrointestinal illness caused by parasitic protozoa of the genus Cryptosporidium, which can cause profuse, watery diarrhea that can last up to 2-3 weeks in immunocompetent patients and can lead to life-threatening wasting and malabsorption in immunocompromised patients. Fecal-oral transmission of Cryptosporidium oocysts, the parasite's infectious life stage, occurs via ingestion of contaminated recreational water, drinking water, or food, or following contact with infected persons or animals, particularly preweaned bovine calves (1)...
May 19, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28494284/evaluating-the-impact-of-irrigation-on-surface-water-groundwater-interaction-and-stream-temperature-in-an-agricultural-watershed
#4
Hedeff I Essaid, Rodney R Caldwell
Changes in groundwater discharge to streams caused by irrigation practices can influence stream temperature. Observations along two currently flood-irrigated reaches in the 640-square-kilometer upper Smith River watershed, an important agricultural and recreational fishing area in west-central Montana, showed a downstream temperature decrease resulting from groundwater discharge to the stream. A watershed-scale coupled surface water and groundwater flow model was used to examine changes in streamflow, groundwater discharge to the stream and stream temperature resulting from irrigation practices...
May 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28489717/coliphages-and-gastrointestinal-illness-in-recreational-waters-pooled-analysis-of-six-coastal-beach-cohorts
#5
Jade Benjamin-Chung, Benjamin F Arnold, Timothy J Wade, Kenneth Schiff, John F Griffith, Alfred P Dufour, Stephen B Weisberg, John M Colford
BACKGROUND: Coliphages have been proposed as indicators of fecal contamination in recreational waters because they better mimic the persistence of pathogenic viruses in the environment and wastewater treatment than fecal indicator bacteria. We estimated the association between coliphages and gastrointestinal illness and compared it to the association with culturable enterococci. METHODS: We pooled data from six prospective cohort studies that enrolled coastal beachgoers in California, Alabama, and Rhode Island...
May 9, 2017: Epidemiology
https://www.readbyqxmd.com/read/28483548/evaluation-of-triclosan-in-minnesota-lakes-and-rivers-part-ii-human-health-risk-assessment
#6
Lisa J Yost, Timothy R Barber, P Robinan Gentry, Michael J Bock, Jennifer L Lyndall, Marie C Capdevielle, Brian P Slezak
Triclosan, an antimicrobial compound found in consumer products, has been detected in low concentrations in Minnesota municipal wastewater treatment plant (WWTP) effluent. This assessment evaluates potential health risks for exposure of adults and children to triclosan in Minnesota surface water, sediments, and fish. Potential exposures via fish consumption are considered for recreational or subsistence-level consumers. This assessment uses two chronic oral toxicity benchmarks, which bracket other available toxicity values...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28477238/identifying-societal-preferences-for-river-restoration-in-a-densely-populated-urban-environment-evidence-from-a-discrete-choice-experiment-in-central-brussels
#7
Wendy Y Chen, Inge Liekens, Steven Broekx
One of the major challenges facing river restoration in densely populated urban areas has been the disparity between the expectations of policy-makers and societal preferences. This study aimed to elicit public preferences and elucidate underlying sources of preference heterogeneity, using the Zenne River in central Brussels, Belgium, as a case study. A discrete choice experiment was administered to a representative sample of the Brussels population. Five attributes were specified, including water quality, ecological status, hydromorphological features of channels, recreational opportunities, and monetary cost...
May 5, 2017: Environmental Management
https://www.readbyqxmd.com/read/28473615/ten-days-of-repeated-local-forearm-heating-does-not-affect-cutaneous-vascular-function
#8
Michael A Francisco, Vienna E Brunt, Krista Nicole Jensen, Santiago Lorenzo, Christopher Todd Minson
The aim of the present study was to determine whether 10 days of repeated local heating was capable of inducing peripheral adaptations to the cutaneous vasculature, and to investigate potential mechanisms of adaptation. We also assessed maximal forearm blood flow to determine if repeated local heating affects maximal dilator capacity. METHODS: Before and after 10 days of heat training consisting of one-hour forearm exposures to 42°C water, or 32°C (control) in the contralateral arm (randomized and counterbalanced), we assessed hyperemia to rapid local heating of the skin (N=14 young, recreationally-active subjects)...
May 4, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28456079/temporal-variations-analyses-and-predictive-modeling-of-microbiological-seawater-quality
#9
Darija Vukić Lušić, Lado Kranjčević, Senka Maćešić, Dražen Lušić, Slaven Jozić, Željko Linšak, Lovorka Bilajac, Luka Grbčić, Neiro Bilajac
Bathing water quality is a major public health issue, especially for tourism-oriented regions. Currently used methods within EU allow at least a 2.2 day period for obtaining the analytical results, making outdated the information forwarded to the public. Obtained results and beach assessment are influenced by the temporal and spatial characteristics of sample collection, and numerous environmental parameters, as well as by differences of official water standards. This paper examines the temporal variation of microbiological parameters during the day, as well as the influence of the sampling hour, on decision processes in the management of the beach...
April 21, 2017: Water Research
https://www.readbyqxmd.com/read/28437769/contamination-study-of-forest-track-soils-located-in-a-recreational-area-and-filled-with-steel-industry-waste-30years-ago
#10
Leticia Gómez-Nubla, Julene Aramendia, Silvia Fdez-Ortiz de Vallejuelo, Juan Manuel Madariaga
The reuse of waste is increasingly widespread in order to avoid the exploitation of natural resources and to reduce costs. An example of that reuse is the employment of steel slag, a by-product from the steel making process. When the steel is produced through an electric arc furnace (EAF), two types of slag are generated: black and white slag. One application rarely used for this waste is as filler in forest tracks. In this work, two forest tracks of the Basque Country (northern Spain) filled with black and white slag 19 and 35years ago, respectively, have been studied...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28434183/impacts-of-forestry-on-boreal-forests-an-ecosystem-services-perspective
#11
REVIEW
Tähti Pohjanmies, María Triviño, Eric Le Tortorec, Adriano Mazziotta, Tord Snäll, Mikko Mönkkönen
Forests are widely recognized as major providers of ecosystem services, including timber, other forest products, recreation, regulation of water, soil and air quality, and climate change mitigation. Extensive tracts of boreal forests are actively managed for timber production, but actions aimed at increasing timber yields also affect other forest functions and services. Here, we present an overview of the environmental impacts of forest management from the perspective of ecosystem services. We show how prevailing forestry practices may have substantial but diverse effects on the various ecosystem services provided by boreal forests...
April 22, 2017: Ambio
https://www.readbyqxmd.com/read/28432932/surveillance-of-vittaforma-corneae-in-hot-springs-by-a-small-volume-procedure
#12
Jung-Sheng Chen, Tsui-Kang Hsu, Bing-Mu Hsu, Tung-Yi Huang, Yu-Li Huang, Men-Fang Shaio, Dar-Der Ji
Vittaforma corneae is an obligate intracellular fungus and can cause human ocular microsporidiosis. Although accumulating reports of V. corneae causing keratoconjunctivitis in both healthy and immunocompromised persons have been published, little is known about the organism's occurrence in aquatic environments. Limitations in detection sensitivity have meant a large sampling volume is required to detect the pathogen up to now, which is problematic. A recent study in Taiwan has shown that some individuals suffering from microsporidial keratitis (MK) were infected after exposure to the pathogen at a hot spring...
July 1, 2017: Water Research
https://www.readbyqxmd.com/read/28428874/population-assessment-using-multivariate-time-series-analysis-a-case-study-of-rockfishes-in-puget-sound
#13
Nick Tolimieri, Elizabeth E Holmes, Gregory D Williams, Robert Pacunski, Dayv Lowry
Estimating a population's growth rate and year-to-year variance is a key component of population viability analysis (PVA). However, standard PVA methods require time series of counts obtained using consistent survey methods over many years. In addition, it can be difficult to separate observation and process variance, which is critical for PVA. Time-series analysis performed with multivariate autoregressive state-space (MARSS) models is a flexible statistical framework that allows one to address many of these limitations...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28427569/chronic-low-level-exposure-to-the-common-seafood-toxin-domoic-acid-causes-cognitive-deficits-in-mice
#14
Kathi A Lefebvre, Preston S Kendrick, Warren Ladiges, Emma M Hiolski, Bridget E Ferriss, Donald R Smith, David J Marcinek
The consumption of one meal of seafood containing domoic acid (DA) at levels high enough to induce seizures can cause gross histopathological lesions in hippocampal regions of the brain and permanent memory loss in humans and marine mammals. Seafood regulatory limits have been set at 20mgDA/kg shellfish to protect human consumers from symptomatic acute exposure, but the effects of repetitive low-level asymptomatic exposure remain a critical knowledge gap. Recreational and Tribal-subsistence shellfish harvesters are known to regularly consume low levels of DA...
April 2017: Harmful Algae
https://www.readbyqxmd.com/read/28426408/isolation-and-molecular-characterization-of-a-naegleria-strain-from-a-recreational-water-fountain-in-tenerife-canary-islands-spain
#15
María Reyes-Batlle, Carolina Wagner, Atteneri López-Arencibia, Ines Sifaoui, Enrique Martínez-Carretero, Basilio Valladares, Jose E Piñero, Jacob Lorenzo-Morales
Free-Living Amoebae (FLA) are widely distributed protozoa in the environment and have been isolated from many sources such as dust, soil and water. Among the pathogenic genera included in this group Acanthamoeba spp., Naegleria fowleri and Balamuthia mandrillaris have been reported to be causative agents of lethal encephalitis, disseminated infections and keratitis. Naegleria fowleri is a pathogenic FLA species which causes Primary Amoebic Meningoencephalitis (PAM). At present there are not many available data on the distribution of Naegleria species in Spain from environmental sources...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28424217/use-of-life-jackets-and-other-types-of-flotation-for-in-water-recreation-in-designated-swim-areas-in-washington-state
#16
Linda Quan, Thomas Mangione, Elizabeth Bennett, Wendy Chow
Most fatal drownings worldwide occur in open water. Flotation devices may protect swimmers. Their use by those recreating in water has not been described. METHODS: Observational survey of swimmers and waders at designated swim sites at lakes and rivers evaluated them by age group, sex, type of flotation used (life jacket vs substandard flotation, eg, water wings, noodles, inflatables) and, for children <6 years, being within arm's reach of an adult. RESULTS: Of 1967 swimmers/waders observed, 37% used some type of flotation device...
April 19, 2017: Injury Prevention: Journal of the International Society for Child and Adolescent Injury Prevention
https://www.readbyqxmd.com/read/28424132/outcomes-of-recreational-activity-associated-trauma-in-elderly-persons-on-blood-thinning-medications
#17
Zachary M DeBoard, Jonathan Grotts, Lisa Ferrigno
With increasing life expectancy, the elderly are participating in recreational activities traditionally pursued by younger persons. Elderly patients have many reasons for worse outcomes after trauma, one of which may be the rising use of anticoagulant and/or antiplatelet medications. This study aimed to determine whether preinjury use of these agents yielded worse outcomes in geriatric patients injured during high-impact recreational activities. The National Trauma Data Bank was reviewed from 2007 to 2010 for patients ≥65 years admitted to Level I or II trauma centers with ICD-9 E-codes for specific mechanisms of injury...
April 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28411571/a-structural-equation-modeling-approach-to-water-quality-perceptions
#18
Jonas G Levêque, Robert C Burns
Researches on water quality perceptions have used various techniques and models to explain relationships between specific variables. Surprisingly, Structural Equation Modeling (SEM) has received little attention in water quality perceptions studies, and reporting has been inconsistent among existing studies. One objective of this article is to provide readers with a methodological example for conducting and reporting SEM. Another objective is to build a model that explains the different relationships among the diverse factors highlighted by previous studies on water quality perceptions...
April 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28397524/effects-of-oxygen-enriched-air-on-cognitive-performance-during-scuba-diving-an-open-water-study
#19
Anne-Kathrin Brebeck, Andreas Deussen, Henning Schmitz-Peiffer, Ursula Range, Costantino Balestra, Sinclair Cleveland, Jochen D Schipke
Backround: Nitrogen narcosis impairs cognitive function, a fact relevant during SCUBA-diving. Oxygen-enriched air (nitrox) became popular in recreational diving, while evidence of its advantages over air is limited. AIM: Compare effects of nitrox28 and air on two psychometric tests. METHODS: In this prospective, double-blind, open-water study, 108 advanced divers (38 females) were randomized to an air or a nitrox-group for a 60-min dive to 24 m salt water. Breathing gas effects on cognitive performance were assessed during the dive using a short- and long-term memory test and a number connection test...
April 11, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28357819/a-comparative-evaluation-of-two-decompression-procedures-for-technical-diving-using-inflammatory-responses-compartmental-versus-ratio-deco
#20
COMPARATIVE STUDY
Enzo Spisni, Claudio Marabotti, Luigia De Fazio, Maria Chiara Valerii, Elena Cavazza, Stefano Brambilla, Klarida Hoxha, Antonio L'Abbate, Pasquale Longobardi
INTRODUCTION: The aim of this study was to compare two decompression procedures commonly adopted by technical divers: the ZH-L16 algorithm modified by 30/85 gradient factors (compartmental decompression model, CDM) versus the 'ratio decompression strategy' (RDS). The comparison was based on an analysis of changes in diver circulating inflammatory profiles caused by decompression from a single dive. METHODS: Fifty-one technical divers performed a single trimix dive to 50 metres' sea water (msw) for 25 minutes followed by enriched air (EAN50) and oxygen decompression...
March 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
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