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Epidemiologic Methods

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https://www.readbyqxmd.com/read/28806866/molecular-screening-and-single-nucleotide-polymorphism-typing-of-molluscum-contagiosum-virus-mcv-from-genital-specimens-between-2012-and-2015
#1
Sedigheh Taghinezhad-S, Amir Hossein Mohseni, Hossein Keyvani, Narges Ghobadi
Background: The present study is the first comprehensive report of the Molluscum contagiosum virus (MCV) in Iran based on the molecular technique for differentiation and typing of the MCV1 and MCV2. Methods: Patients were diagnosed as having tumor-like genital warts less than 5 mm in diameter, and HIV seronegative samples were chosen for this cross-sectional study. TaqMan real-time PCR was used to identify MCV following clinical examination. Typing of the MCV-positive specimens was performed in the SNP A27451G region of MC021L gene...
August 15, 2017: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/28806363/clinical-epidemiology-of-single-versus-multiple-substance-use-disorders-polysubstance-use-disorder
#2
Ish P Bhalla, Elina A Stefanovics, Robert A Rosenheck
OBJECTIVE: While research on substance abuse has largely focused on people who have a single substance use disorder (SUD), many people abuse multiple substances. Studies have yet to examine the distinctive characteristics of patients diagnosed with more than 1 SUD and how those with polysubstance use disorder (PSUD) differ from those with a single SUD. METHODS: National Veterans Health Administration data from fiscal year 2012 were used to compare veterans diagnosed 1 SUD to veterans diagnosed with 2-3, and >3 SUDs on demographic characteristics, psychiatric and medical diagnoses, medical and psychiatric service utilization, and psychotropic medication fills...
September 2017: Medical Care
https://www.readbyqxmd.com/read/28805682/alk-in-non-small-cell-lung-cancer-nsclc-pathobiology-epidemiology-detection-from-tumor-tissue-and-algorithm-diagnosis-in-a-daily-practice
#3
REVIEW
Paul Hofman
Patients with advanced-stage non-small cell lung carcinoma (NSCLC) harboring an ALK rearrangement, detected from a tissue sample, can benefit from targeted ALK inhibitor treatment. Several increasingly effective ALK inhibitors are now available for treatment of patients. However, despite an initial favorable response to treatment, in most cases relapse or progression occurs due to resistance mechanisms mainly caused by mutations in the tyrosine kinase domain of ALK. The detection of an ALK rearrangement is pivotal and can be done using different methods, which have variable sensitivity and specificity depending, in particular, on the quality and quantity of the patient's sample...
August 12, 2017: Cancers
https://www.readbyqxmd.com/read/28805163/cryptosporidium-in-fish-alternative-sequencing-approaches-and-analyses-at-multiple-loci-to-resolve-mixed-infections
#4
Andrea Paparini, Rongchang Yang, Linda Chen, Kaising Tong, Susan Gibson-Kueh, Alan Lymbery, Una M Ryan
Currently, the systematics, biology and epidemiology of piscine Cryptosporidium species are poorly understood. Here, we compared Sanger ‒ and next-generation ‒ sequencing (NGS), of piscine Cryptosporidium, at the 18S rRNA and actin genes. The hosts comprised 11 ornamental fish species, spanning four orders and eight families. The objectives were: to (i) confirm the rich genetic diversity of the parasite and the high frequency of mixed infections; and (ii) explore the potential of NGS in the presence of complex genetic mixtures...
August 14, 2017: Parasitology
https://www.readbyqxmd.com/read/28804947/periodontitis-and-non-alcoholic-fatty-liver-disease-a-population-based-cohort-investigation-in-the-study-of-health-in-pomerania
#5
Aderonke A Akinkugbe, Gary D Slade, A Sidney Barritt, Steven Offenbacher, Astrid Petersmann, Thomas Kocher, Markus M Lerch, Julia Mayerle, Henry Völzke, Gerardo Heiss, Birte Holtfreter
Non-alcoholic fatty liver disease (NAFLD) affects 20-30% of adults with risk factors like obesity and insulin resistance putatively acting through chronic low-grade inflammation. Because periodontitis elicits low-grade inflammation, we hypothesized that it could contribute to NAFLD occurrence. Objective To investigate epidemiologic associations between periodontitis and the incidence of NAFLD among 2,623 participants of the Study of Health in Pomerania METHODS: Periodontitis at baseline was defined as the percentage of sites (0%, 1-30%, ≥30%) with 1) clinical attachment level (CAL) ≥3mm; 2) probing pocket depth (PD) ≥4mm...
August 14, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28804595/natural-exposure-of-bats-in-grenada-to-rabies-virus
#6
Ulrike Zieger, Sonia Cheetham, Sharlene E Santana, Leith Leiser-Miller, Vanessa Matthew-Belmar, Hooman Goharriz, Anthony R Fooks
Introduction: Grenada is a rabies endemic country, where terrestrial rabies is maintained in the small Indian mongoose (Herpestes auropunctatus). The role of bats in the epidemiology of rabies in Grenada is unknown. A 1974 report described one rabies virus positive Jamaican fruit bat (Artibeus jamaicensis), and a high seroprevalence in this species. In the current study, the natural exposure to rabies virus in Grenadian bats was re-evaluated. It is postulated that bats serve as a natural rabies reservoir, probably circulating a bat-specific rabies virus variant...
2017: Infection Ecology & Epidemiology
https://www.readbyqxmd.com/read/28803393/challenges-and-opportunities-for-occupational-epidemiology-in-the-twenty-first-century
#7
REVIEW
L T Stayner, J J Collins, Y L Guo, D Heederik, M Kogevinas, K Steenland, C Wesseling, P A Demers
PURPOSE OF REVIEW: There are many opportunities and challenges for conducting occupational epidemiologic studies today. In this paper, we summarize the discussion of a symposium held at the Epidemiology in Occupational Health (EPICOH) conference, Chicago 2014, on challenges for occupational epidemiology in the twenty-first century. RECENT FINDINGS: The increasing number of publications and attendance at our conferences suggests that worldwide interest in occupational epidemiology has been growing...
August 12, 2017: Current Environmental Health Reports
https://www.readbyqxmd.com/read/28802757/the-typhoid-vaccine-acceleration-consortium-tyvac-vaccine-effectiveness-study-designs-accelerating-the-introduction-of-typhoid-conjugate-vaccines-and-reducing-the-global-burden-of-enteric-fever-report-from-a-meeting-held-on-26-27-october-2016-oxford-uk
#8
James E Meiring, Malick Gibani
Typhoid fever is estimated to cause between 11.9-26.9 million infections globally each year with 129,000-216,510 deaths. Access to improved water sources have reduced disease incidence in parts of the world but the use of efficacious vaccines is seen as an important public health tool for countries with a high disease burden. A new generation of Vi typhoid conjugate vaccines (TCVs), licensed for use in young children and expected to provide longer lasting protection than previous vaccines, are now available...
August 9, 2017: Vaccine
https://www.readbyqxmd.com/read/28801832/simultaneous-measurement-of-total-estradiol-and-testosterone-in-human-serum-by-isotope-dilution-liquid-chromatography-tandem-mass-spectrometry
#9
Hui Zhou, Yuesong Wang, Matthew Gatcombe, Jacob Farris, Julianne C Botelho, Samuel P Caudill, Hubert W Vesper
Reliable measurement of total testosterone and estradiol is critical for their use as biomarkers of hormone-related disorders in patient care and translational research. We developed and validated a mass spectrometry method to simultaneously quantify these analytes in human serum without chemical derivatization. Serum is equilibrated with isotopic internal standards and treated with acidic buffer to release hormones from their binding proteins. Lipids are isolated and polar impurities are removed by two serial liquid-liquid extraction steps...
August 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28800758/validation-of-verbal-autopsy-determination-of-cause-of-deaths-in-malaysia-2013
#10
Shubash Shander Ganapathy, Yi Yi Khoo, Mohd Omar Azahadi, Mohamad Anuar Mohamad Fuad, Chandrika Jeevananthan, Chalapati Rao
BACKGROUND: Mortality statistics by age, sex and cause are the foundation of basic health data required for health status assessment, epidemiological research and formation of health policy. Close to half the deaths in Malaysia occur outside a health facility, are not attended by medical personnel, and are given a lay opinion as to the cause of death, leading to poor quality of data from vital registration. Verbal autopsy (VA) is a very useful tool in diagnosing broad causes of deaths for events that occur outside health facilities...
August 11, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28800090/the-effect-of-buffering-high-acid-load-meal-with-sodium-bicarbonate-on-postprandial-glucose-metabolism-in-humans-a-randomized-placebo-controlled-study
#11
Pinar Kozan, Jackson C Blythe, Jerry R Greenfield, Dorit Samocha-Bonet
Background: High dietary acid load relates to increased risk of type 2 diabetes in epidemiological studies. We aimed to investigate whether buffering a high acid load meal with an alkalizing treatment changes glucose metabolism post meal. Methods: Non-diabetic participants (n = 32) were randomized to receive either 1680 mg NaHCO₃ or placebo, followed by a high acid load meal in a double-blind placebo-controlled crossover (1-4 weeks apart) study. Thirty (20 men) participants completed the study. Venous blood pH, serum bicarbonate, blood glucose, serum insulin, C-peptide, non-esterified fatty acid (NEFA), and plasma glucagon-like peptide-1 (GLP-1) concentrations were measured at baseline (fasting) and at 15-30 min intervals for 3 h post meal...
August 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28796986/evaluation-of-stomatognathic-problems-in-children-with-osteogenesis-imperfecta-osteogenesis-imperfecta-oi-preliminary-study
#12
Danuta Smoląg, Małgorzata Kulesa-Mrowiecka, Jerzy Sułko
According to epidemiological data, muscular dysfunctions of the masticatory system occur in 15-23% of the population. Preventive examinations of functional disorders of the stomatognathic system are, therefore, of particular importance. A distinct group of patients exposed to dysfunctions in the area of the masticatory organ locomotor apparatus comprises those with genetic diseases characterised by disorders in collagen formation. One of such diseases is osteogenesis imperfecta (OI) and dentinogenesis imperfecta that usually goes together with the former...
2017: Developmental Period Medicine
https://www.readbyqxmd.com/read/28796630/opportunities-and-challenges-for-personal-heat-exposure-research
#13
Evan R Kuras, Molly B Richardson, Miriam M Calkins, Kristie L Ebi, Jeremy J Hess, Kristina W Kintziger, Meredith A Jagger, Ariane Middel, Anna A Scott, June T Spector, Christopher K Uejio, Jennifer K Vanos, Benjamin F Zaitchik, Julia M Gohlke, David M Hondula
BACKGROUND: Environmental heat exposure is a public health concern. The impacts of environmental heat on mortality and morbidity at the population scale are well documented, but little is known about specific exposures that individuals experience. OBJECTIVES: The first objective of this work was to catalyze discussion of the role of personal heat exposure information in research and risk assessment. The second objective was to provide guidance regarding the operationalization of personal heat exposure research methods...
August 1, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28796427/epidemiology-of-venous-thromboembolism-in-africa-a-systematic-review
#14
C Danwang, M N Temgoua, V N Agbor, A T Tankeu, J J Noubiap
Essentials Venous thromboembolism (VTE) is among the three main causes of cardiovascular disease worldwide. This review is the first to summarize the epidemiology of VTE in African populations. The prevalence of VTE in Africa is high following surgery, in pregnancy and post-partum. At least one quarter of patients at risk of VTE in Africa are not receiving prophylaxis. SUMMARY: Background Venous thromboembolism (VTE) is among the three leading causes of cardiovascular disease worldwide...
August 10, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28795594/the-battle-of-worldviews-a-case-study-of-liver-fluke-infection-in-khon-kaen-thailand
#15
Sara Samiphak, S Leonard Syme
Control efforts to reduce infection from the parasitic flatworm Opisthorchis viverrini have progressed through understanding the epidemiology of Opisthorchis viverrini, antiparasitic drug developments, technological innovations, health education promoting cooking of fish, and improved hygienic defecation. Yet the problem persists. The case study method was used to examine the fundamental cause of the liver fluke infection problem. Evidence shows that the liver fluke-infected population does not care about living a long life...
January 1, 2017: Journal of Evidence-based Complementary & Alternative Medicine
https://www.readbyqxmd.com/read/28795146/refining-the-policy-for-timing-of-kidney-transplant-waitlist-qualification
#16
Benjamin J Lee, Charles E McCulloch, Barbara A Grimes, Sindhu Chandran, Isabel Elaine Allen, Cynthia Delgado, Chi-Yuan Hsu
BACKGROUND: Earlier qualification for the kidney transplant waitlist expedites transplant and is therefore associated with improved outcomes. U.S. Organ Procurement and Transplantation Network policies state that "measured or calculated creatinine clearance or glomerular filtration rate less than or equal to 20 mL/min" triggers waitlist time accrual. The choice of qualification method is somewhat arbitrary, and the policy implies that decline in renal function is monotonic. METHODS: (1) We used survival analysis to quantify temporal differences in waitlist qualification by applying 3 kidney-function-estimating equations (Cockcroft-Gault, Modification of Diet in Renal Disease study, Chronic Kidney Disease Epidemiology Collaboration) to serial creatinine measurements from 3 patient cohorts: 1 of waitlisted patients at a major U...
August 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28795108/data-for-the-oxford-abdominal-aortic-aneurysm-study-international-survey-of-vascular-surgery-professionals
#17
Regent Lee, Amy Jones, Felicity Woodgate, Nicholas Killough, Kirthi Bellamkonda, Matthew Williams, Katherine Hurst, Lucy Fulford-Smith, Ismail Cassimjee, Ashok Handa
As part of the Oxford Abdominal Aortic Aneurysm (OxAAA) Study, we conducted an international survey of vascular surgery professionals. One aspect of the survey is as published in the International Journal of Cardiology: "International Opinion on Priorities in Research for Small Abdominal Aortic Aneurysms and the Potential Path for Research to Impact Clinical Management". This Data-in-Brief article contains a detailed method for the conduct of this survey and additional original data. In this survey, we also provided vascular surgery colleagues with contemporary epidemiologic and surgical outcome data...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28795006/epidemiology-of-sports-related-musculoskeletal-injuries-in-young-athletes-in-united-states
#18
REVIEW
Dilip R Patel, Ai Yamasaki, Kelly Brown
Over the past several decades there has been increased participation in sports by children and adolescents at earlier ages in the United States, as well as more intense participation and specialization in sports at very early ages. This trend has also partly contributed to the patterns of injuries seen in young athletes, and especially in recent years, injuries previously seen in mature athletes are being seen in young athletes. Overall, the vast majority of sport-related musculoskeletal injuries in children and adolescents are due to repetitive overuse and acute macrotrauma is less frequently seen in young athletes...
July 2017: Translational pediatrics
https://www.readbyqxmd.com/read/28794894/swine-enteric-colibacillosis-diagnosis-therapy-and-antimicrobial-resistance
#19
REVIEW
Andrea Luppi
Intestinal infection with enterotoxigenic Escherichia coli (ETEC) is an important disease in swine resulting in significant economic losses. Knowledge about the epidemiology, the diagnostic approach and methods of control are of fundamental importance to tackle the disease. The ETEC causing neonatal colibacillosis mostly carry the fimbriae F4 (k88), F5 (k99), F6 (987P) or F41, while the ETEC of post-weaning diarrhoea carry the fimbriae F4 (k88) and F18. These fimbriae adhere to specific receptors on porcine intestinal brush border epithelial cells (enterocytes), starting the process of enteric infection...
2017: Porcine Health Management
https://www.readbyqxmd.com/read/28794221/revised-time-scales-of-rna-virus-evolution-based-on-spatial-information
#20
Moritz Saxenhofer, Vanessa Weber de Melo, Rainer G Ulrich, Gerald Heckel
The time scales of pathogen evolution are of major concern in the context of public and veterinary health, epidemiology and evolutionary biology. Dating the emergence of a pathogen often relies on estimates of evolutionary rates derived from nucleotide sequence data. For many viruses, this has yielded estimates of evolutionary origins only a few hundred years in the past. Here we demonstrate through the incorporation of geographical information from virus sampling that evolutionary age estimates of two European hantaviruses are severely underestimated because of pervasive mutational saturation of nucleotide sequences...
August 16, 2017: Proceedings. Biological Sciences
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