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https://www.readbyqxmd.com/read/29323203/an-epidemiological-study-of-the-risk-factors-associated-with-myopia-in-young-adult-men-in-korea
#1
Dong Cheol Lee, Se Youp Lee, Yu Cheol Kim
The prevalence of myopia has been increasing worldwide. Its causes are not completely clear, although genetic and environmental factors are thought to play a role. Data were collected by the Korean Military Manpower Administration. Frequency analysis was used for comparisons of general characteristics. Pearson's chi-square tests and logistic regression analysis were used to verify the correlations between possible risk factors and the prevalence of myopia or high myopia. The prevalence of myopia (50.6-53.0%) and high myopia (11...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29318983/prevalence-and-determinants-of-vitamin-d-deficiency-in-the-third-trimester-of-pregnancy-a-multicentre-study-in-switzerland
#2
Jean-Philippe Krieger, Sophie Cabaset, Claudia Canonica, Ladina Christoffel, Aline Richard, Therese Schröder, Begoña Lipp von Wattenwyl, Sabine Rohrmann, Katharina Quack Lötscher
Vitamin D deficiency during pregnancy is associated with negative health consequences for mothers and their infants. Data on the vitamin D status of pregnant women in Switzerland are scarce. A three-centre study was conducted in the obstetric departments of Zurich, Bellinzona and Samedan (Switzerland) to investigate the prevalence and determinants of vitamin D deficiency (serum 25-hydroxyvitamin D (25(OH)D)<50 nmol/l) in 3rd-trimester pregnant women living in Switzerland (n 305), and the correlation between 25(OH)D in pregnant women and their offspring at birth (n 278)...
January 10, 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29306640/species-interactions-may-help-explain-the-erratic-periodicity-of-whooping-cough-dynamics
#3
Samit Bhattacharyya, Matthew J Ferrari, Ottar N Bjørnstad
Incidence of whooping cough exhibits variable dynamics across time and space. The periodicity of this disease varies from annual to five years in different geographic regions in both developing and developed countries. Many hypotheses have been put forward to explain this variability such as nonlinearity and seasonality, stochasticity, variable recruitment of susceptible individuals via birth, immunization, and immune boosting. We propose an alternative hypothesis to describe the variability in periodicity - the intricate dynamical variability of whooping cough may arise from interactions between its dominant etiological agents of Bordetella pertussis and Bordetella parapertussis...
December 14, 2017: Epidemics
https://www.readbyqxmd.com/read/29305459/fractures-of-the-femoral-shaft-in-children-national-epidemiology-and-treatment-trends-in-england-following-activation-of-major-trauma-networks
#4
C Talbot, N Davis, I Majid, M Young, O Bouamra, F E Lecky, S Jones
AIMS: The aim of this study was to describe the epidemiology of closed isolated fractures of the femoral shaft in children, and to compare the treatment and length of stay (LOS) between major trauma centres (MTCs) and trauma units (TUs) in England. PATIENTS AND METHODS: National data were obtained from the Trauma and Audit Research Network for all isolated, closed fractures of the femoral shaft in children from birth to 15 years of age, between 2012 and 2015. Age, gender, the season in which the fracture occurred, non-accidental injury, the mechanism of injury, hospital trauma status, LOS and type of treatment were recorded...
January 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29297811/fecal-cortisol-levels-in-scimitar-horned-oryx-oryx-dammah-reveals-differences-between-captive-environments
#5
Cassandra D Pauling, Scott E Lankford, Victoria L Jackson
Due to the intensive management of the scimitar-horned oryx, Oryx dammah, involving both captivity and reintroductions, understanding the stress associated with environmental situations this endangered species might experience would be particularly helpful. Fecal cortisol levels were measured across seasons, between captive management programs, and among varying reproductive states in animals held at Fossil Rim Wildlife Center (FRWC) and Kansas City Zoo (KCZ). A total of 72 samples were collected from FRWC and 69 samples were collected from KCZ...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29297052/association-of-long-term-exposure-to-airborne-particulate-matter-of-1-%C3%AE-m-or-less-with-preterm-birth-in-china
#6
Yuan-Yuan Wang, Qin Li, Yuming Guo, Hong Zhou, Xiaobin Wang, Qiaomei Wang, Haiping Shen, Yiping Zhang, Donghai Yan, Ya Zhang, Hongguang Zhang, Shanshan Li, Gongbo Chen, Jun Zhao, Yuan He, Ying Yang, Jihong Xu, Yan Wang, Zuoqi Peng, Hai-Jun Wang, Xu Ma
Importance: Airborne particulate matter pollution has been associated with preterm birth (PTB) in some studies. However, most of these studies assessed only populations living near monitoring stations, and the association of airborne particulate matter having a median diameter of 1 μm or less (PM1) with PTB has not been studied. Objective: To evaluate whether PM1 concentrations are associated with the risk of PTB. Design, Setting, and Participants: This national cohort study used National Free Preconception Health Examination Project data collected in 324 of 344 prefecture-level cities from 30 provinces of mainland China...
January 2, 2018: JAMA Pediatrics
https://www.readbyqxmd.com/read/29295484/indigenous-infant-mortality-by-age-and-season-of-birth-1800-1899-did-season-of-birth-affect-children-s-chances-for-survival
#7
Lena Karlsson
This paper focuses on the influence of season of birth on infant mortality among the Sami and non-Sami populations in northern Sweden during the nineteenth century. The source material is a set of data files from the Demographic Data Base at Umeå University, making it possible to combine age at death (in days), month of death, and month of birth over the course of the entire century. Cox regression models reveal that for the first week of life, season of birth had no influence on the risk of mortality. For the Sami, the results showed that being born during winter was related to a higher risk of neonatal mortality, and being born during summer was related to a higher risk of mortality after six months of age...
December 23, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29290433/associations-between-management-practices-and-within-pen-prevalence-of-calf-diarrhea-and-respiratory-disease-on-dairy-farms-using-automated-milk-feeders
#8
Catalina Medrano-Galarza, Stephen J LeBlanc, Andria Jones-Bitton, Trevor J DeVries, Jeffrey Rushen, Anne Marie de Passillé, Marcia I Endres, Derek B Haley
Data on management practices used with automated milk feeders (AMF) are needed to identify factors associated with calf health in these systems. The objectives of this observational, longitudinal, cross-sectional study were to estimate the prevalence of calf diarrhea (CD) and bovine respiratory disease (BRD), and to identify factors associated with prevalence of these diseases at the pen level on dairy farms feeding milk to group-housed calves with AMF. Seventeen dairy farms with AMF in Ontario, Canada, were visited 4 times, seasonally, over 1 yr...
December 28, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29279092/weight-gain-and-resistance-to-gastrointestinal-nematode-infections-in-two-genetically-diverse-groups-of-cattle
#9
Johan Höglund, Anna Hessle, Konstantinos Zaralis, Katarina Arvidsson-Segerkvist, Spiridoula Athanasiadou
Body weight gain (BWG) and gastrointestinal nematode challenge (GIN) were investigated in two genetically diverse groups of cattle. Thirty-two dairy calves (D=Swedish Red/Holstein) and 31 dairy×beef crosses (C=Swedish Red/Holstein×Charolais) pairwise matched by dam breed and birth dates, were monitored for ≈20 weeks on a pasture grazed by cattle in the previous year. At turn-out, animals (between 6 and 12 months age) from each genotype were either infected with 5000 third stage (L3) Ostertagia ostertagi (50%) and Cooperia oncophora (50%) larvae (H, high-exposure); or treated monthly with 0...
January 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29277165/reasons-and-risk-factors-for-beef-calf-and-youngstock-on-farm-mortality-in-extensive-cow-calf-herds
#10
K Mõtus, A Viltrop, U Emanuelson
Raising calves and youngstock is an essential part of beef production. High on-farm mortality (unassisted death and euthanasia) is a consequence of poor animal health and welfare, and is economically unfavourable. The present study aimed to identify the reasons and risk factors for beef calf and youngstock on-farm mortality, using registry data for the years 2013 to 2015. Cox regression models were applied for the data of four age groups: calves up to 30 days (n=21 075), calves 1 to 5 months (n=21 116), youngstock 6 to 19 months (n=22 637) and youngstock ⩾20 months of age (n=9582)...
December 26, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29276621/developing-a-novel-risk-prediction-model-for-severe-malarial-anemia
#11
E B Brickley, E Kabyemela, J D Kurtis, M Fried, A M Wood, P E Duffy
As a pilot study to investigate whether personalized medicine approaches could have value for the reduction of malaria-related mortality in young children, we evaluated questionnaire and biomarker data collected from the Mother Offspring Malaria Study Project birth cohort (Muheza, Tanzania, 2002-2006) at the time of delivery as potential prognostic markers for pediatric severe malarial anemia. Severe malarial anemia, defined here as a Plasmodium falciparum infection accompanied by hemoglobin levels below 50 g/L, is a key manifestation of life-threatening malaria in high transmission regions...
2017: Glob Health Epidemiol Genom
https://www.readbyqxmd.com/read/29273135/complex-relationships-between-vitamin-d-and-allergic-sensitization-among-puerto-rican-2-year-old-children
#12
Srimathi Kannan, Matthew S Perzanowski, Harish B Ganguri, Dolores Acevedo-Garcia, Luis M Acosta, Molly Spatcher, Adnan Divjan, Ginger L Chew
BACKGROUND: In the United States, Puerto Ricans have a higher prevalence of asthma than other Latino ethnicities. Low vitamin D levels for children living in northern climates could be a factor. OBJECTIVE: To assess serum 25-hydroxyvitamin D [25(OH)D] distributions (a marker of vitamin D) and associations among vitamin D, allergic sensitization, early wheeze, and home/demographic factors. METHODS: Puerto Rican infants born in New York City, with a maternal history of atopy, were enrolled in a birth cohort...
January 2018: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29260490/growth-traits-of-crossbreds-of-ankole-with-brown-swiss-holstein-friesian-jersey-and-sahiwal-cattle-in-rwanda
#13
Maximillian Manzi, Lotta Rydhmer, Martin Ntawubizi, Callixte Karege, Erling Strandberg
The objective of the study was to compare body weights and growth from birth to 18 months of age of various groups of crossbred cattle born from 1999 to 2007, being crossbreds of Ankole (A) with Brown Swiss (B), Holstein Friesian (F), Jersey (J), and Sahiwal (S). Average weights were 26.5 kg at birth, 161 kg at weaning, and 226 kg at 18 months. Both season and sex significantly affected birth weight (BW), weight at 8 and 18 months (W8 and W18), and average daily gain from weaning to 18 months (ADG18) and, unlike season, sex significantly affected average daily gain to 8 months and weaning age...
December 19, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29233481/road-traffic-noise-and-determinants-of-saliva-cortisol-levels-among-adolescents
#14
Alva Wallas, Charlotta Eriksson, Olena Gruzieva, Tomas Lind, Andrei Pyko, Mattias Sjöström, Mikael Ögren, Göran Pershagen
OBJECTIVES: The understanding of determinants for saliva cortisol levels in adolescents is limited. This study investigated the role of road traffic noise exposure, noise annoyance and various other factors for saliva cortisol levels. METHODS: We collected morning and evening saliva samples from 1751 adolescents from the BAMSE birth cohort based in Stockholm County. Façade noise levels from road traffic were estimated at the residences of the study subjects and repeated questionnaires and medical examinations provided extensive information on various exposures and conditions, including annoyance to noise from different sources...
November 22, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29227912/annual-variations-in-sexual-hormones-and-births-frequency-in-female-stump-tailed-macaques-macaca-arctoides
#15
R Mondragón-Ceballos, M D García-Granados, G Matamoros-Trejo, L E Hernández-López
Although the breeding seasonality in Macaca arctoides have been studied over a long period of time, it is still controversial whether reproduction in this primate tend to increase during certain months of the year as it happens in most of the macaque species. Many authors have classified Macaca arctoides as not being seasonal species. Nonetheless, there were no reports, about seasonal variations of female sexual hormones to demonstrate that asseveration. Therefore, in the present study we collect 1611 fecal samples from June 2009 to November 2010 from 10 female stump-tailed macaques to measure 17β-estradiol and progesterone concentrations...
November 20, 2017: Theriogenology
https://www.readbyqxmd.com/read/29227900/exposures-to-fine-particulate-matter-pm2-5-and-birthweight-in-a-rural-urban-mother-child-cohort-in-tamil-nadu-india
#16
Kalpana Balakrishnan, Santu Ghosh, Gurusamy Thangavel, Sankar Sambandam, Krishnendu Mukhopadhyay, Naveen Puttaswamy, Arulselvan Sadasivam, Padmavathi Ramaswamy, Priscilla Johnson, Rajarajeswari Kuppuswamy, Durairaj Natesan, Uma Maheshwari, Amudha Natarajan, Gayathri Rajendran, Rengaraj Ramasami, Sathish Madhav, Saraswathy Manivannan, Srinivasan Nargunanadan, Srinivasan Natarajan, Sudhakar Saidam, Moumita Chakraborty, Lingeswari Balakrishnan, Vijayalakshmi Thanasekaraan
BACKGROUND: Exposure to PM2.5 (fine particulate matter <less than 2.5µm in aerodynamic diameter) related to ambient and household air pollution has been associated with low birthweight. Few of these studies, however, have been conducted in high exposure settings that are commonly encountered in low and middle income countries (LMICs). OBJECTIVES: We examined whether PM2.5 exposures during pregnancy were associated with birthweight in an integrated rural-urban, mother-child cohort in the state of Tamil Nadu, India...
December 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/29227860/respiratory-syncytial-virus-in-brazilian-infants-ten-years-two-cohorts
#17
Elinara Wollmeister, Alfonso Eduardo Alvarez, Juliana Cristina Santiago Bastos, Fernando Augusto Lima Marson, José Dirceu Ribeiro, Emílio Carlos Elias Baracat, Clarice Weis Arns, Adriana Gut Lopes Riccetto
BACKGROUND: Each year, a considerable amount of children will experience at least one episode of acute viral bronchiolitis (AVB) during their first year of life. About 10% of them will be hospitalized, with significant physical and economic burdens. OBJECTIVES: To compare two cohorts of infants with AVB, from same region, in a ten-year interval, regarding epidemiologic factors and viral etiology. STUDY DESIGN: Cohorts: 142 (2004) and 172 (2014) infants at ages zero to 12 months; clinical diagnosis of AVB; medical care in hospital and genetic screening of nasopharyngeal secretion for respiratory viruses...
December 6, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29221891/the-evolution-of-host-defence-to-parasitism-in-fluctuating-environments
#18
Charlotte Ferris, Alex Best
Given rapidly changing environments, it is important for us to understand how the evolution of host defence responds to fluctuating environments. Here we present the first theoretical study of evolution of host resistance to parasitism in a classic epidemiological model where the host birth rate varies seasonally. We show that this form of seasonality has clear qualitative and quantitative impacts on the evolution of resistance. When the host can recover from infection, it evolves a lower level of defence when the amplitude is high...
December 5, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29218072/spatial-multiresolution-analysis-of-the-effect-of-pm2-5-on-birth-weights
#19
Joseph Antonelli, Joel Schwartz, Itai Kloog, Brent A Coull
Fine particulate matter (PM2.5) measured at a given location is a mix of pollution generated locally and pollution traveling long distances in the atmosphere. Therefore, the identification of spatial scales associated with health effects can inform on pollution sources responsible for these effects, resulting in more targeted regulatory policy. Recently, prediction methods that yield high-resolution spatial estimates of PM2.5 exposures allow one to evaluate such scale-specific associations. We propose a two-dimensional wavelet decomposition that alleviates restrictive assumptions required for standard wavelet decompositions...
2017: Annals of Applied Statistics
https://www.readbyqxmd.com/read/29215449/seasonal-variation-of-orofacial-clefts
#20
Chrysis Sofianos, Efthimios A Christofides, Sibusiso E Phiri
BACKGROUND: Orofacial clefts represent the most common craniofacial malformation diagnosed at birth and may be divided into isolated cleft lip (CL), cleft lip and palate (CL/P), or isolated cleft palate (CP). The causes of orofacial clefts have long been understood to be multifactorial; however, research into the genetic and environmental factors underpinning these disorders in African populations is scant. Seasonal variation in the occurrence of orofacial clefts was investigated. Seasonal variation is defined as differences due to periodic, temporal, and external influences, namely the particular time or season of the year...
December 6, 2017: Journal of Craniofacial Surgery
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