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https://www.readbyqxmd.com/read/29048956/geographic-distribution-of-scorpion-exposures-in-the-united-states-2010-2015
#1
A Min Kang, Daniel E Brooks
OBJECTIVES: To determine the geographic distribution of scorpion envenomations in the United States by zip code, with particular attention to the neurotoxic Centruroides sculpturatus (Arizona bark scorpion), for which an antivenom is available. METHODS: We obtained scorpion exposure cases for 2010 to 2015 from the National Poison Data System. Using geographic information systems software, we mapped total exposures and incidence rates for 9 states that reported more than 100 annual calls...
October 19, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/29048750/isotopic-niche-variation-from-the-holocene-to-today-reveals-minimal-partitioning-and-individualistic-dynamics-among-four-sympatric-desert-mice
#2
Rebecca C Terry
1.Species interact with each other and their environment over a range of temporal scales, yet our understanding of resource partitioning and the mechanisms of species coexistence is largely restricted to modern time-scales of years to decades. Furthermore, the relative magnitudes of inter- versus intraspecific variation in resource use are rarely considered, despite the potential for the latter to influence a species' ability to cope with changing environmental conditions. 2.Modern desert rodent communities are thought to be strongly structured by competitive interactions, with niche partitioning of food resources hypothesized to explain the coexistence of multiple sympatric granivores...
October 19, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28976797/temporal-trends-in-the-uptake-and-continuation-of-the-etonogestrel-implant-in-a-large-private-practice-setting
#3
David L Howard, Avery Ford, Sonia Ceballos, K Warren Volker
OBJECTIVE: To assess temporal trends in the uptake and continuation of the etonogestrel subdermal implant in a large private practice setting. METHODS: This was a retrospective cohort study based on billing records from a large multispecialty private practice in Las Vegas, Nevada. We looked at women of all ages seeking long-acting reversible contraception (LARC) between January 1, 2013, and December 31, 2016. The main outcome measure was uptake of the etonogestrel subdermal implant, expressed as a fraction of all insertions of LARC across four calendar years (2013-2016)...
October 4, 2017: Journal of Women's Health
https://www.readbyqxmd.com/read/28972651/breast-cancer-statistics-2017-racial-disparity-in-mortality-by-state
#4
Carol E DeSantis, Jiemin Ma, Ann Goding Sauer, Lisa A Newman, Ahmedin Jemal
In this article, the American Cancer Society provides an overview of female breast cancer statistics in the United States, including data on incidence, mortality, survival, and screening. Approximately 252,710 new cases of invasive breast cancer and 40,610 breast cancer deaths are expected to occur among US women in 2017. From 2005 to 2014, overall breast cancer incidence rates increased among Asian/Pacific Islander (1.7% per year), non-Hispanic black (NHB) (0.4% per year), and Hispanic (0.3% per year) women but were stable in non-Hispanic white (NHW) and American Indian/Alaska Native (AI/AN) women...
October 3, 2017: CA: a Cancer Journal for Clinicians
https://www.readbyqxmd.com/read/28959621/health-effects-following-subacute-exposure-to-geogenic-dust-collected-from-active-drainage-surfaces-nellis-dunes-recreation-area-las-vegas-nv
#5
Jamie C DeWitt, Brenda J Buck, Dirk Goossens, Yuanxin Teng, James Pollard, Brett T McLaurin, Russell Gerads, Deborah E Keil
The specific health effects of direct inhalation of fine minerogenic dusts generated by natural soil surfaces remain poorly known and relatively little researched. To learn more about this exposure and its contribution to human health effects, we surveyed surface sediment and characterized dust from the Nellis Dunes Recreation Area (NDRA) in Clark County, Nevada, a popular off-road vehicle (ORV) recreational site. Dry drainage systems at NDRA are commonly used as natural trail systems for ORV recreation; these surfaces also are characterized by high concentrations of heavy metals...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/28951881/state-level-implementation-of-health-and-safety-policies-to-prevent-sudden-death-and-catastrophic-injuries-within-secondary-school-athletics
#6
William M Adams, Samantha E Scarneo, Douglas J Casa
BACKGROUND: Sudden death and catastrophic injuries during sport can be attenuated with the implementation of evidence-based health and safety policies. However, the extent of the implementation of these policies within secondary school athletics is unknown. PURPOSE: To provide an assessment of the implementation of health and safety policies pertaining to the leading causes of sudden death and catastrophic injuries in sport within secondary school athletics in the United States...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28940527/prioritizing-forest-fuels-treatments-based-on-the-probability-of-high-severity-fire-restores-adaptive-capacity-in-sierran-forests
#7
Daniel J Krofcheck, Matthew D Hurteau, Robert M Scheller, E Louise Loudermilk
In frequent fire forests of the western United States, a legacy of fire suppression coupled with increases in fire weather severity have altered fire regimes and vegetation dynamics. When coupled with projected climate change, these conditions have the potential to lead to vegetation type change and altered carbon (C) dynamics. In the Sierra Nevada, fuels reduction approaches that include mechanical thinning followed by regular prescribed fire are one approach to restore the ability of the ecosystem to tolerate episodic fire and still sequester C...
September 23, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28929402/characteristics-of-laws-requiring-physicians-to-report-patient-information-for-public-health-surveillance-notable-patterns-from-a-nevada-case-study
#8
Maxim Gakh, Brian Labus, Brittany Walker
Laws across the globe require healthcare providers to disclose patient health information to public health entities for surveillance and intervention purposes. Physicians play a unique role in such mandatory reporting regimes. However, research reveals consistent under-reporting and points to limited knowledge of mandates, perceived burdens of reporting, misaligned incentives and penalties, and a lack of streamlined processes as significant reporting barriers. These barriers suggest that how legal mandates are structured may impact compliance; yet little research systematically examines their characteristics...
September 19, 2017: Journal of Community Health
https://www.readbyqxmd.com/read/28919504/cryptic-elevational-zonation-in-trapdoor-spiders-araneae-antrodiaetidae-aliatypus-janus-complex-from-the-california-southern-sierra-nevada
#9
James Starrett, Cheryl Y Hayashi, Shahan Derkarabetian, Marshal Hedin
The relative roles of ecological niche conservatism versus niche divergence in promoting montane speciation remains an important topic in biogeography. Here, our aim was to test whether lineage diversification in a species complex of trapdoor spiders corresponds with riverine barriers or with an ecological gradient associated with elevational tiering. Aliatypus janus was sampled from throughout its range, with emphasis on populations in the southern Sierra Nevada Mountains of California. We collected multi-locus genetic data to generate a species tree for A...
September 15, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28904767/genetic-differentiation-and-inferred-dynamics-of-a-hybrid-zone-between-northern-spotted-owls-strix-occidentalis-caurina-and-california-spotted-owls-s-%C3%A2-o-%C3%A2-occidentalis-in-northern-california
#10
Mark P Miller, Thomas D Mullins, Eric D Forsman, Susan M Haig
Genetic differentiation among Spotted Owl (Strix occidentalis) subspecies has been established in prior studies. These investigations also provided evidence for introgression and hybridization among taxa but were limited by a lack of samples from geographic regions where subspecies came into close contact. We analyzed new sets of samples from Northern Spotted Owls (NSO: S. o. caurina) and California Spotted Owls (CSO: S. o. occidentalis) in northern California using mitochondrial DNA sequences (mtDNA) and 10 nuclear microsatellite loci to obtain a clearer depiction of genetic differentiation and hybridization in the region...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28900275/-87-sr-86-sr-evidence-from-the-epeiric-martin-ridge-basin-for-enhanced-carbonate-weathering-during-the-hirnantian
#11
Dongping Hu, Xiaolin Zhang, Lian Zhou, Stanley C Finney, Yongsheng Liu, Danielle Shen, Megan Shen, Wei Huang, Yanan Shen
A pronounced positive δ(13)C excursion in the Hirnantian Age has been documented globally, reflecting large perturbations of carbon cycling in the Late Ordovician oceans. Increased organic-carbon burial or enhanced carbonate weathering during glacioeustatic sea-level regression has been proposed to account for this anomalous C-isotope excursion. To test the two competing hypotheses, we measured (87)Sr/(86)Sr and δ(13)C of carbonates from the Copenhagen Canyon section in Nevada, USA. Our data reveal two rapid negative (87)Sr/(86)Sr shifts that coincide with two prominent positive δ(13)C excursions and glacial advances...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28873261/impacts-of-different-land-management-histories-on-forest-change
#12
Brandon M Collins, Danny L Fry, Jamie M Lydersen, Richard Everett, Scott L Stephens
Many western North American forest types have experienced considerable changes in ecosystem structure, composition, and function as a result of both fire exclusion and timber harvesting. These two influences co-occurred over a large portion of dry forests making it difficult to know the strength of either one on its own or the potential for an interaction between the two. In this study we used contemporary re-measurements of a systematic historical forest inventory to investigate forest change in the Sierra Nevada...
September 5, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28872517/favorable-outcome-in-coccidioides-endophthalmitis-a-combined-medical-and-surgical-treatment-approach
#13
Jennifer J Ling, Derek J Bays, George R Thompson, Ala Moshiri, Mark J Mannis
PURPOSE: To describe a case of Coccidioides endophthalmitis that resulted in a favorable visual outcome after a combined medical and surgical approach. METHODS: A 33-year-old previously healthy woman was referred for evaluation of dyspnea and left-sided vision loss, which began 3 months before, after a trip to Nevada. She was found to have a pulmonary cavitary lesion and fluffy white material in the anterior chamber. An aqueous and vitreous paracentesis grew Coccidioides species...
August 31, 2017: Cornea
https://www.readbyqxmd.com/read/28871610/what-mediates-tree-mortality-during-drought-in-the-southern-sierra-nevada
#14
Tarin Paz-Kagan, Philip G Brodrick, Nicholas R Vaughn, Adrian J Das, Nathan L Stephenson, Koren R Nydick, Gregory P Asner
Severe drought has the potential to cause selective mortality within a forest, thereby inducing shifts in forest species composition. The southern Sierra Nevada foothills and mountains of California have experienced extensive forest dieback due to drought stress and insect outbreak. We used high-fidelity imaging spectroscopy (HiFIS) and light detection and ranging (LiDAR) from the Carnegie Airborne Observatory (CAO) to estimate the effect of forest dieback on species composition in response to drought stress in Sequoia National Park...
September 4, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28870655/comparative-health-effects-in-mice-of-libby-amphibole-asbestos-and-a-fibrous-amphibole-from-arizona
#15
Jean C Pfau, Brenda Buck, Rodney V Metcalf, Zoie Kaupish, Caleb Stair, Maria Rodriguez, Deborah E Keil
This project developed from studies demonstrating that Libby Amphibole Asbestos (LAA) causes a non-typical set of health outcomes not generally reported for asbestos, including systemic autoimmunity and an unusual and devastating lamellar pleural thickening that progresses to severe pulmonary dysfunction and death. Further, mineral fiber mixtures with some similarities to LAA have recently been discovered in southern Nevada and northwestern Arizona, where the material exists in extensive recreational areas and is present in yards, roads, parking lots and school yards...
November 1, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28854268/apparent-climate-mediated-loss-and-fragmentation-of-core-habitat-of-the-american-pika-in-the-northern-sierra-nevada-california-usa
#16
Joseph A E Stewart, David H Wright, Katherine A Heckman
Contemporary climate change has been widely documented as the apparent cause of range contraction at the edge of many species distributions but documentation of climate change as a cause of extirpation and fragmentation of the interior of a species' core habitat has been lacking. Here, we report the extirpation of the American pika (Ochotona princeps), a temperature-sensitive small mammal, from a 165-km2 area located within its core habitat in California's Sierra Nevada mountains. While sites surrounding the area still maintain pikas, radiocarbon analyses of pika fecal pellets recovered within this area indicate that former patch occupancy ranges from before 1955, the beginning of the atmospheric spike in radiocarbon associated with above ground atomic bomb testing, to c...
2017: PloS One
https://www.readbyqxmd.com/read/28833814/climate-change-and-saharan-dust-drive-recent-cladoceran-and-primary-production-changes-in-remote-alpine-lakes-of-sierra-nevada-spain
#17
Laura Jiménez, Kathleen M Rühland, Adam Jeziorski, John P Smol, Carmen Pérez-Martínez
Recent anthropogenic climate change and the exponential increase over the past few decades of Saharan dust deposition, containing ecologically important inputs of phosphorus (P) and calcium (Ca), are potentially affecting remote aquatic ecosystems. In this study, we examine changes in cladoceran assemblage composition and chlorophyll-a concentrations over the past ~150 years from high-resolution, well-dated sediment cores retrieved from six remote high mountain lakes in the Sierra Nevada Mountains of Southern Spain, a region affected by Saharan dust deposition...
August 22, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28807285/sarcoptes-scabiei-alters-follicular-dynamics-in-female-iberian-ibex-through-a-reduction-in-body-weight
#18
José Espinosa, José E Granados, Francisco J Cano-Manuel, Jorge R López-Olvera, Arián Ráez-Bravo, Diego Romero, Ramón C Soriguer, Jesús M Pérez, Paulino Fandos
Normal development of the ovarian cycle is a key factor in ensuring female reproductive success. Sarcoptes scabiei has been shown to induce changes in host physiology, although the effects of this mite on the female reproductive cycle are still unknown. In an attempt to clarify this issue, the number of ovarian structures (primary follicles, secondary follicles, Graaf follicles, corpus luteum and corpus albicans) in female Iberian ibex (Capra pyrenaica) affected by sarcoptic mange was explored by histological analysis of samples taken from 102 females selectively harvested in the Sierra Nevada Natural Space, southern Spain...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28769705/a-new-species-of-the-genus-parachemmis-chickering-1937-from-colombia-araneae-corinnidae-corinninae
#19
Leonel Martinez, Eduardo Villarreal, Neis Martinez
The spider genus Parachemmis Chickering, 1937 (Araneae: Corinnidae: Corinninae) is reported from Colombia for the first time. Parachemmis julioblancoisp. n. Martinez-G & Villarreal is described and illustrated from the Sierra Nevada de Santa Marta, Magdalena department. The exclusive morphology of the short and apically truncated retrolateral tibial apophysis and club-like tegular laminar process of the male palp indicates that the specimens described herein belong to a new species of Parachemmis. A map of the distribution of species in the genus is included...
2017: ZooKeys
https://www.readbyqxmd.com/read/28769677/a-review-of-the-flea-genus-phalacropsylla-rothschild-1915-siphonaptera-ctenophthalmidae-neopsyllinae-phalacropsyllini-with-new-host-and-distributional-records
#20
Roxana Acosta, Michael W Hastriter
A redescription of the genus Phalacropsylla Rothschild is provided. Six species are recognized: Phalacropsylla allos Wagner, P. hamata Tipton and Mendez, P. morlani Eads and Campos, P. nivalis Barrera and Traub, P. oregonensis Lewis and Maser, and P. paradisea Rothschild. Phalacropsylla hamata is designated herein as a junior synonym of P. paradisea. The distribution of P. paradisea is more extensive than previously thought, extending from Arizona through southern Colorado, into New Mexico, Texas, and northern Mexico (State of Nuevo León)...
2017: ZooKeys
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