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Molecular epidemiology

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https://www.readbyqxmd.com/read/27915307/diversity-and-antifungal-drug-susceptibility-of-cryptococcus-isolates-in-thailand
#1
Navaporn Worasilchai, Marut Tangwattanachuleeporn, Kornvalee Meesilpavikkai, Claudia Folba, Mourine Kangogo, Uwe Groß, Michael Weig, Oliver Bader, Ariya Chindamporn
Yeasts of the Cryptococcus species complex are the causative agent of cryptococcosis, especially in human immunodeficiency virus (HIV) positive individuals. Cerebral or disseminated cryptococcosis has a very high mortality rate worldwide, including in Thailand. Additionally, an increasing rate of antifungal drug resistant cryptococcal isolates has been reported in several neighboring countries, complicating therapeutic approaches. To understand the situation of this infection in Thailand, we retrospectively investigated the molecular epidemiology and antifungal drug resistance in a collection of 74 clinical, 52 environmental and two veterinary isolates using the URA5-RFLP for typing and the EUCAST guideline for susceptibility testing...
December 3, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27915187/dose-response-models-and-a-quantitative-microbial-risk-assessment-framework-for-the-mycobacterium-avium-complex-that-account-for-recent-developments-in-molecular-biology-taxonomy-and-epidemiology
#2
REVIEW
Kerry A Hamilton, Mark H Weir, Charles N Haas
Mycobacterium avium complex (MAC) is a group of environmentally-transmitted pathogens of great public health importance. This group is known to be harbored, amplified, and selected for more human-virulent characteristics by amoeba species in aquatic biofilms. However, a quantitative microbial risk assessment (QMRA) has not been performed due to the lack of dose response models resulting from significant heterogeneity within even a single species or subspecies of MAC, as well as the range of human susceptibilities to mycobacterial disease...
November 24, 2016: Water Research
https://www.readbyqxmd.com/read/27915089/complete-mitochondrial-genome-of-parasitic-nematode-cylicocyclus-nassatus-and-comparative-analyses-with-cylicocyclus-insigne
#3
Yuan Gao, Jian-Hua Qiu, Bing-Bing Zhang, Xin Su, Xue Fu, Dong-Mei Yue, Chun-Ren Wang
Cylicocyclus nassatus is a common and important parasite in the large intestine of equine. In this study, the complete mitochondrial (mt) genome sequence of C. nassatus was determined and comparatively analysed with Cylicocyclus insigne. The mt genome size of C. nassatus was 13,846 bp, 18 bp longer than that of C. insigne. The circular mt genome includes 12 protein-coding genes, two rRNA genes, 22 tRNA genes and two non-coding regions. All the genes are transcribed in the same direction and gene arrangement is consistent with that of gene arrangement 3 (GA3)...
November 30, 2016: Experimental Parasitology
https://www.readbyqxmd.com/read/27914957/multiple-locus-variable-number-tandem-repeat-analysis-mlva-of-shigella-sonnei-isolates-of-2012-outbreak-i-r-iran
#4
Bita Bakhshi, Bahareh Bayat, Abdolaziz Rastegar Lari
Shigella sonnei is a major cause of diarrhea especially in children. Molecular study can help to determine the outbreak of this bacterium. Multiple-Locus Variable number tandem repeat Analysis (MLVA) will largely influence the public health field by introducing newer, faster, safer, and effective procedure for typing of microorganisms. A total of fifty shigella isolates were collected between November 2012 to October 2013 in Tehran, Iran. The strains were identified base on biochemical and molecular tests. Subsequently, all shigella species were confirmed by species-specific polymerase chain reaction (PCR)...
November 30, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27914739/infection-by-mycobacterium-bovis-in-a-dog-from-brazil
#5
Vivianne Cambuí Figueiredo Rocha, Salomão Cambuí de Figueiredo, Cesar Alejandro Rodriguez Rosales, Camila Dias Porto, Julio Lopes Sequeira, José Soares Ferreira Neto, Antônio Carlos Paes, Vanessa Riesz Salgado
Tuberculosis (TB) is a chronic disease caused by bacteria belonging to the Mycobacterium tuberculosis complex (MtbC). This disease rarely affects dogs. Canine infections are usually caused by M. tuberculosis. Mycobacterium bovis infections are rare in dogs and associated with consumption of raw milk or contaminated products. Here, we report a Boxer dog who had a M. bovis infection and was admitted to a Brazilian veterinary hospital with a presumptive diagnosis of chronic ehrlichiosis. Despite receiving treatment for chronic ehrlichiosis, it progressed to death...
October 3, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27909910/biological-mechanisms-for-the-effect-of-obesity-on-cancer-risk-experimental-evidence
#6
Mauricio Berriel Diaz, Stephan Herzig, Tobias Schafmeier
Multiple epidemiological studies demonstrated that overweight and obesity significantly increase the risk of several types of cancer. As the prevalence of obesity is dramatically rising, it is expected that it will represent one of the major lifestyle-associated risk factors for cancer development in the near future. Numerous recent studies expanded knowledge about key players and pathways, which are deregulated in the obese state and potentially promote cancer initiation, progression and aggressiveness via remote and local effects...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27909909/obesity-biomarkers-metabolism-and-risk-of-cancer-an-epidemiological-perspective
#7
Katharina Nimptsch, Tobias Pischon
Obesity is associated with metabolic alterations that may pose a biological link between body fatness and risk of cancer. Elucidating the role of obesity-related biomarkers in cancer development is essential for developing targeted strategies aiming at obesity-associated cancer prevention. Molecular epidemiological studies of the past decades have provided evidence that major hormonal pathways linking obesity and cancer risk include the insulin and insulin-like growth factor-1 (IGF-1) axis, sex-steroid hormones, adipokines and chronic low-grade inflammation...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27909905/obesity-and-endometrial-cancer
#8
Eileen Shaw, Megan Farris, Jessica McNeil, Christine Friedenreich
Endometrial cancer is the sixth most common cancer in women worldwide and the most common gynecologic malignancy in the developed world. This chapter explores the current epidemiologic evidence on the association between obesity and endometrial cancer risk and mortality. Using body mass index (BMI) as a measure of obesity, we found that obesity (defined as BMI > 30 and < 35 kg/m(2)) was associated with a 2.6-fold increase in endometrial cancer risk, while severe obesity (BMI > 35 kg/m(2)) was associated with a 4...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27908998/whole-genome-sequencing-applied-to-the-molecular-epidemiology-of-shiga-toxin-producing-escherichia-coli-o157-h7-in-argentina
#9
Claudia Carolina Carbonari, Nahuel Fittipaldi, Sarah Teatero, Taryn B T Athey, Luis Pianciola, Marcelo Masana, Roberto G Melano, Marta Rivas, Isabel Chinen
Shiga toxin-producing Escherichia coli strains are worldwide associated with sporadic human infections and outbreaks. In this work, we report the availability of high-quality draft whole-genome sequences for 19 O157:H7 strains isolated in Argentina.
December 1, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27908797/molecular-detection-and-characterization-of-respiratory-syncytial-virus-b-genotypes-circulating-in-pakistani-children
#10
Uzma Bashir, Nadia Nisar, Nayab Mahmood, Muhammad Masroor Alam, Hajra Sadia, Syed Sohail Zahoor Zaidi
Respiratory syncytial virus (RSV) is the major cause of acute lower respiratory tract infections in young children, but very little is known about its epidemiology and circulating genotypes in Pakistan. This study analyzed the epidemiological and molecular characteristics of RSV B genotypes in Pakistani children below 5years with acute respiratory tract infections (ARIs) during three consecutive winter seasons from 2010 to 2013. A total of 1941 samples were analyzed for RSV infection by real time PCR and 24% (472/1941) samples were found positive out of which 22...
November 28, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27908771/molecular-detection-and-genetic-characterization-of-babesia-theileria-and-anaplasma-amongst-apparently-healthy-sheep-and-goats-in-the-central-region-of-turkey
#11
Mo Zhou, Shinuo Cao, Ferda Sevinc, Mutlu Sevinc, Onur Ceylan, Sepil Ekici, Charoonluk Jirapattharasate, Paul Franck Adjou Moumouni, Mingming Liu, Guanbo Wang, Aiko Iguchi, Patrick Vudriko, Hiroshi Suzuki, Xuenan Xuan
Babesia spp., Theileria spp. and Anaplasma spp. are significant tick-borne pathogens of livestock globally. In this study, we investigated the presence and distribution of Babesia ovis, Theileria ovis and Anaplasma ovis in 343 small ruminants (249 sheep and 94 goats) from 13 towns in the Central Anatolia region of Turkey using species-specific PCR assays. The PCR were conducted using the primers based on the B. ovis ssu rRNA (BoSSUrRNA), T. ovis ssu rRNA (ToSSUrRNA) and A. ovis major surface protein 4 (AoMSP4) genes, respectively...
November 16, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27908420/biological-effects-of-tolerable-level-chronic-boron-intake-on-transcription-factors
#12
Seda Orenay Boyacioglu, Mehmet Korkmaz, Erkan Kahraman, Hatice Yildirim, Selin Bora, Osman Yavuz Ataman
The mechanism of boron effect on human transcription and translation has not been fully understood. In the current study it was aimed to reveal the role of boron on the expression of certain transcription factors that play key roles in many cellular pathways on human subjects chronically exposed to low amounts of boron. The boron concentrations in drinking water samples were 1.57±0.06mg/l for boron group while the corresponding value for the control group was 0.016±0.002mg/l. RNA isolation was performed using PAX gene RNA kit on the blood samples from the subjects...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908343/a%C3%AE-amyloid-pathology-affects-the-hearts-of-patients%C3%A2-with%C3%A2-alzheimer-s-disease-mind%C3%A2-the-heart
#13
Luca Troncone, Marco Luciani, Matthew Coggins, Elissa H Wilker, Cheng-Ying Ho, Kari Elise Codispoti, Matthew P Frosch, Rakez Kayed, Federica Del Monte
BACKGROUND: Individually, heart failure (HF) and Alzheimer's disease (AD) are severe threats to population health, and their potential coexistence is an alarming prospect. In addition to sharing analogous epidemiological and genetic profiles, biochemical characteristics, and common triggers, the authors recently recognized common molecular and pathological features between the 2 conditions. Whereas cognitive impairment has been linked to HF through perfusion defects, angiopathy, and inflammation, whether patients with AD present with myocardial dysfunction, and if the 2 conditions bear a common pathogenesis as neglected siblings are unknown...
December 6, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27907230/reverse-geroscience-how-does-exposure-to-early-diseases-accelerate-the-age-related-decline-in-health
#14
Ronald A Kohanski, Steven G Deeks, Claudia Gravekamp, Jeffrey B Halter, Kevin High, Arti Hurria, Rebecca Fuldner, Paige Green, Robin Huebner, Francesca Macchiarini, Felipe Sierra
Aging is the major risk factor for both the development of chronic diseases and loss of functional capacity. Geroscience provides links among the biology of aging, the biology of disease, and the physiology of frailty, three fields where enormous progress has been made in the last few decades. While, previously, the focus was on the role of aging in susceptibility to disease and disability, the other side of this relationship, which is the contribution of disease to aging, has been less explored at the molecular/cellular level...
December 1, 2016: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/27907129/meningococcal-carriage-in-military-recruits-and-university-students-during-the-pre-menb-vaccination-era-in-greece-2014-2015
#15
Kyriaki Tryfinopoulou, Konstantinos Kesanopoulos, Athanasia Xirogianni, Nektarios Marmaras, Anastasia Papandreou, Vassiliki Papaevangelou, Maria Tsolia, Aftab Jasir, Georgina Tzanakaki
PURPOSE: The aim of the study was to estimate the meningococcal carriage rate and to identify the genotypic characteristics of the strains isolated from healthy military recruits and university students in order to provide data that might increase our understanding on the epidemiology of meningococcus and obtain information which helps to evaluate the potential effects on control programs such as vaccination. METHODS: A total of 1420 oropharyngeal single swab samples were collected from military recruits and university students on voluntary basis, aged 18-26 years...
2016: PloS One
https://www.readbyqxmd.com/read/27906002/hiv-1-genetic-diversity-and-its-distribution-characteristics-among-newly-diagnosed-hiv-1-individuals-in-hebei-province-china
#16
Xinli Lu, Cuiying Zhao, Wei Wang, Chenxi Nie, Yuqi Zhang, Hongru Zhao, Suliang Chen, Ze Cui
BACKGROUND: Since the first HIV-1 case in 1989, Hebei province has presented a clearly rising trend of HIV-1 prevalence, and HIV-1 genetic diversity has become the vital barrier to HIV prevention and control in this area. To obtain detailed information of HIV-1 spread in different populations and in different areas of Hebei, a cross-sectional HIV-1 molecular epidemiological investigation was performed across the province. METHODS: Blood samples of 154 newly diagnosed HIV-1 individuals were collected from ten prefectures in Hebei using stratified sampling...
January 19, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27903721/cross-talk-between-brain-innate-immunity-and-serotonin-signaling-underlies-depressive-like-behavior-induced-by-alzheimer-s-amyloid-%C3%AE-oligomers-in-mice
#17
Jose Henrique Ledo, Estefania P Azevedo, Danielle Beckman, Felipe C Ribeiro, Luis E Santos, Daniela S Razolli, Grasielle C Kincheski, Helen M Melo, Maria Bellio, Antonio L Teixeira, Licio A Velloso, Debora Foguel, Fernanda G De Felice, Sergio T Ferreira
: Considerable clinical and epidemiological evidence links Alzheimer's disease (AD) and depression. However, the molecular mechanisms underlying this connection are largely unknown. We reported recently that soluble Aβ oligomers (AβOs), toxins that accumulate in AD brains and are thought to instigate synapse damage and memory loss, induce depressive-like behavior in mice. Here, we report that the mechanism underlying this action involves AβO-induced microglial activation, aberrant TNF-α signaling, and decreased brain serotonin levels...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27903301/high-prevalence-of-strongyloides-stercoralis-in-school-aged-children-in-a-rural-highland-of-north-western-ethiopia-the-role-of-intensive-diagnostic-work-up
#18
Aranzazu Amor, Esperanza Rodriguez, José M Saugar, Ana Arroyo, Beatriz López-Quintana, Bayeh Abera, Mulat Yimer, Endalew Yizengaw, Derejew Zewdie, Zimman Ayehubizu, Tadesse Hailu, Wondemagegn Mulu, Adriana Echazú, Alejandro J Krolewieki, Pilar Aparicio, Zaida Herrador, Melaku Anegagrie, Agustín Benito
BACKGROUND: Soil-transmitted helminthiases (hookworms, Ascaris lumbricoides and Trichuris trichiura) are extremely prevalent in school-aged children living in poor sanitary conditions. Recent epidemiological data suggest that Strongyloides stercoralis is highly unreported. However, accurate data are essential for conducting interventions aimed at introducing control and elimination programmes. METHODS: We conducted a cross-sectional survey of 396 randomly selected school-aged children in Amhara region in rural area in north-western Ethiopia, to assess the prevalence of S...
December 1, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27903288/untangling-the-transmission-dynamics-of-primary-and-secondary-vectors-of-trypanosoma-cruzi-in-colombia-parasite-infection-feeding-sources-and-discrete-typing-units
#19
Carolina Hernández, Camilo Salazar, Helena Brochero, Aníbal Teherán, Luz Stella Buitrago, Mauricio Vera, Hugo Soto, Zulibeth Florez-Rivadeneira, Sussane Ardila, Gabriel Parra-Henao, Juan David Ramírez
BACKGROUND: Trypanosoma cruzi is the causative agent of Chagas disease. Due to its genetic diversity has been classified into six Discrete Typing Units (DTUs) in association with transmission cycles. In Colombia, natural T. cruzi infection has been detected in 15 triatomine species. There is scarce information regarding the infection rates, DTUs and feeding preferences of secondary vectors. Therefore, the aim of this study was to determine T. cruzi infection rates, parasite DTU, ecotopes, insect stages, geographical location and bug feeding preferences across six different triatomine species...
December 1, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27903278/an-overview-on-the-role-of-dietary-phenolics-for-the-treatment-of-cancers
#20
REVIEW
Preethi G Anantharaju, Prathima C Gowda, Manjunatha G Vimalambike, SubbaRao V Madhunapantula
Plant derived phenolic compounds have been shown to inhibit the initiation and progression of cancers by modulating genes regulating key processes such as: (a) oncogenic transformation of normal cells; (b) growth and development of tumors; and (c) angiogenesis and metastasis. Recent studies focusing on identifying the molecular basis of plant phenolics-induced cancer cell death have demonstrated down-regulation of: (a) oncogenic survival kinases such as PI3K and Akt; (b) cell proliferation regulators that include Erk1/2, D-type Cyclins, and Cyclin Dependent Kinases (CDKs); (c) transcription factors such as NF-kβ, NRF2 and STATs; (d) histone deacetylases HDAC1 and HDAC2; and (e) angiogenic factors VEGF, FGFR1 and MIC-1...
December 1, 2016: Nutrition Journal
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