keyword
MENU ▼
Read by QxMD icon Read
search

Molecular-epidemiology

keyword
https://www.readbyqxmd.com/read/28446574/the-use-of-genexpert-remnants-for-drug-resistance-profiling-and-molecular-epidemiology-of-tuberculosis-in-libreville-gabon
#1
Amel Kévin Alame-Emane, Catherine Pierre-Audigier, Oriane Cordelia Aboumegone-Biyogo, Amandine Nzoghe-Mveang, Véronique Cadet-Daniel, Christophe Sola, Joël Fleury Djoba-Siawaya, Brigitte Gicquel, Howard E Takiff
Multidrug (MDR) and extensively drug resistant (XDR) Mycobacterium tuberculosis are major problems in global health. The GeneXpertMTB/RIF (Xpert) rapidly detects resistance to rifampicin (RIF-R), but detection of the additional resistance that defines MDR and XDR-TB, and for molecular epidemiology, specimen cultures and biosafe infrastructure are generally required. We sought to determine whether the remnants of sputa prepared for Xpert could be used directly to find mutations associated with drug resistance and for molecular epidemiology, and thus provide a precise characterization of MDR-TB cases in countries lacking BSL3 facilities for M...
April 26, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28442328/simple-quick-and-cost-efficient-a-universal-rt-pcr-and-sequencing-strategy-for-genomic-characterisation-of-foot-and-mouth-disease-viruses
#2
V Dill, M Beer, B Hoffmann
Foot-and-mouth disease (FMD) is a major contributor to poverty and food insecurity in Africa and Asia, and it is one of the biggest threats to agriculture in highly developed countries. As FMD is extremely contagious, strategies for its prevention, early detection, and the immediate characterization of outbreak strains are of great importance. The generation of whole-genome sequences enables phylogenetic characterization, the epidemiological tracing of virus transmission pathways and is supportive in disease control strategies...
April 22, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28440679/cervical-cancer-in-sub-saharan-africa-a-preventable-noncommunicable-disease
#3
Ralph-Sydney Mboumba Bouassa, Thierry Prazuck, Thérèse Lethu, Mohammad-Ali Jenabian, Jean-François Meye, Laurent Bélec
Infections caused by high-risk human papillomavirus (HPV) are responsible for 7.7% of cancers in developing countries, mainly cervical cancer. This disease is steadily increasing in sub-Saharan Africa, with more than 75,000 new cases and 50,000 deaths yearly, further increased by HIV infection. Areas covered: The current status of cervical cancer associated with HPV in sub-Saharan Africa has been systematically revised. The main issues discussed here are related to the public health burden of cervical cancer in sub-Saharan Africa and predictions for the coming decades, including molecular epidemiology and determinants of HPV infection in Africa, and promising prevention measures currently being evaluated in Africa...
April 25, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28438142/%C3%AE-molecular-epidemiological-analysis-of-adenoviruses-from-excess-conjunctivitis-cases
#4
A Balasopoulou, P Κokkinos, D Pagoulatos, P Plotas, O E Makri, C D Georgakopoulos, A Vantarakis
BACKGROUND: Τo perform a molecular epidemiological analysis of viral conjunctivitis among excess conjunctivitis cases recorded at the University Hospital of Patras, Greece, for the period March to June 2012. METHODS: A structured questionnaire containing demographic and clinical data was developed in order to collect retrospective data on the cases. Eye swab specimens were collected and molecular detection of adenoviruses was performed by nested PCR. Positive results were confirmed by sequencing...
April 24, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28435108/molecular-characterization-and-antimicrobial-susceptibility-of-the-ca-mrsa-isolated-from-healthcare-workers-tehran-iran
#5
Solmaz Ohadian Moghadam, Mohammad Modoodi Yaghooti, Nasrin Pourramezan, Mohammad Reza Pourmand
INTRODUCTION: Methicillin resistant Staphylococcus aureus (MRSA) has become as a nosocomial pathogen worldwide. Considering the importance of MRSA typing for understanding the evolution and dissemination of these strains, we studied the molecular characteristics of MRSA colonized healthcare workers (HCWs). METHODOLOGY: All MRSA isolated from HCWs, were genotyped using staphylococcal cassette chromosome mec (SCCmec) with multiplex PCR assay, multilocus sequence typing (MLST) and spa typing...
April 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28432327/genotyping-brucella-canis-isolates-using-a-highly-discriminatory-multilocus-variable-number-tandem-repeat-analysis-mlva-assay
#6
Yi Yang, Yin Wang, Elizabeth Poulsen, Russell Ransburgh, Xuming Liu, Baoyan An, Nanyan Lu, Gary Anderson, Chengming Wang, Jianfa Bai
Differentiation of Brucella canis from other Brucella species are mainly performed through PCR-based methods and multilocus variable-number tandem-repeat (VNTR) analysis (MLVA) procedures. Both PCR-based and MLVA methods are limited in discriminating B. canis strains. A new MLVA-13Bc method for B. canis genotyping was established by combining eight newly-developed VNTRs with five published ones. During 2010 and 2016, 377 B. canis PCR-positives were identified from 6,844 canine blood samples from 22 U.S. states, resulting in 229 B...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428772/molecular-characterization-of-staphylococcus-aureus-isolated-from-bovine-mastitis-and-close-human-contacts-in-south-african-dairy-herds-genetic-diversity-and-inter-species-host-transmission
#7
Tracy Schmidt, Marleen M Kock, Marthie M Ehlers
Staphylococcus aureus is one of the most common etiological agents of contagious bovine mastitis worldwide. The purpose of this study was to genetically characterize a collection of S. aureus isolates (bovine = 146, human = 12) recovered from cases of bovine mastitis and nasal swabs of close human contacts in the dairy environment. Isolates were screened for a combination of clinically significant antimicrobial and virulence gene markers whilst the molecular epidemiology of these isolates and possible inter-species host transmission was investigated using a combination of genotyping techniques...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28427963/molecular-investigation-of-piroplasma-infection-in-white-yaks-bos-grunniens-in-gansu-province-china
#8
Sitong Li, Junlong Liu, Aihong Liu, Youquan Li, Shuqing Wang, Shufang Wang, Hong Yin, Jianxun Luo, Guiquan Guan
Piroplasmosis, including theileriosis and babesiosis, is a tick-borne haemoprotozoan disease responsible for huge economic losses to livestock industry. In China, the biology of piroplasms infective to cattle was well understood on the basis of pathogen isolations and molecular epidemiological surveys in the past few decades. But very limited information about the infection status of piroplasms in white yak (Bos grunniens), a semi-wild and endemic breed, has been recorded, so far. A total of 350 blood samples was collected from white yaks in 11 towns of Tianzhu Tibetan Autonomous County of Gansu province, China, during April to July 2015...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427935/the-manifolded-dynamics-of-hiv-1-transmission-in-northern-alberta-a-combined-analysis-of-virus-genetic-and-public-health-data
#9
B Vrancken, D Adachi, M Benedet, A Singh, R Read, S Shafran, G D Taylor, S Houston, K Simmonds, S Plitt, C Sikora, P Lemey, C L Charlton, J W Tang
Molecular epidemiology has become a key tool for tracking infectious disease epidemics. Here, the spread of the most prevalent HIV-1 subtypes in Northern Alberta, Canada, was characterized with a Bayesian phylogenetic approach using 1146 HIV-1 pol sequences collected between 2007 and 2013 for routine clinical management purposes. Available patient metadata were qualitatively interpreted and correlated with onwards transmission using Fisher exact tests and logistic regression. Most infections were from subtypes A (n=36), B (n=815) and C (n=211)...
April 17, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28427455/comparison-of-methods-for-detecting-asymptomatic-malaria-infections-in-the-china-myanmar-border-area
#10
Yonghong Zhao, Yan Zhao, Yanmin Lv, Fei Liu, Qinghui Wang, Peipei Li, Zhenjun Zhao, Yingjie Liu, Liwang Cui, Qi Fan, Yaming Cao
BACKGROUND: Sensitive methods for detecting asymptomatic malaria infections are essential for identifying potential transmission reservoirs and obtaining an accurate assessment of malaria epidemiology in low-endemicity areas aiming to eliminate malaria. PCR techniques to detect parasite nucleic acids (DNA or RNA) are among the most commonly used molecular methods. However, most of these methods are of low throughput and cannot be used for large-scale molecular epidemiological studies...
April 20, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28425872/increase-in-human-immunodeficiency-virus-1-diversity-and-detection-of-various-subtypes-and-recombinants-in-north-eastern-brazil
#11
Kledoaldo Lima, Élcio Leal, Ana Maria Salustiano Cavalcanti, Daniela Medeiros Salustiano, Luzidalva Barbosa de Medeiros, Sirleide Pereira da Silva, Heloísa Ramos Lacerda
PURPOSE: Diverse human immunodeficiency virus 1 (HIV-1) subtypes and circulating recombinant forms are found in Brazil. The majority of HIV-1 molecular epidemiological studies in Brazil have been conducted in the southern and south-eastern regions of the country, although several recent studies in the north-eastern region have addressed this issue. The objective of this study was to molecularly characterize HIV-1 circulating in Pernambuco, north-eastern Brazil. METHODOLOGY: A total of 64 samples were collected from 2002 to 2003, and another 103 were collected from 2007 to 2009...
April 21, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28424474/molecular-epidemiology-and-azole-resistance-mechanism-study-of-candida-guilliermondii-from-a-chinese-surveillance-system
#12
Jing-Wei Cheng, Kang Liao, Timothy Kudinha, Shu-Ying Yu, Meng Xiao, He Wang, Fanrong Kong, Ying-Chun Xu
We studied the molecular epidemiology and mechanism of azole resistance of 164 C. guilliermondii isolates from a nationwide multi-center surveillance program. The isolates were identified by ITS gene sequencing, and the in vitro susceptibility to fluconazole and voriconazole was determined by broth microdilution method. The 14-α-demethylase gene ERG11 was amplified and sequenced, and microsatellite analysis was performed to study the genetic relatedness of the isolates. Amongst the 164 C. guilliermondii isolates, 15 (9...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422130/assessment-of-metabolic-phenotypic-variability-in-children-s-urine-using-1-h-nmr-spectroscopy
#13
Léa Maitre, Chung-Ho E Lau, Esther Vizcaino, Oliver Robinson, Maribel Casas, Alexandros P Siskos, Elizabeth J Want, Toby Athersuch, Remy Slama, Martine Vrijheid, Hector C Keun, Muireann Coen
The application of metabolic phenotyping in clinical and epidemiological studies is limited by a poor understanding of inter-individual, intra-individual and temporal variability in metabolic phenotypes. Using (1)H NMR spectroscopy we characterised short-term variability in urinary metabolites measured from 20 children aged 8-9 years old. Daily spot morning, night-time and pooled (50:50 morning and night-time) urine samples across six days (18 samples per child) were analysed, and 44 metabolites quantified...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28418807/coagulase-negative-staphylococci-in-human-milk-from-mothers-of-preterm-compared-with-term-neonates
#14
Hiie Soeorg, Tuuli Metsvaht, Imbi Eelmäe, Hanna Kadri Metsvaht, Sirli Treumuth, Mirjam Merila, Mari-Liis Ilmoja, Irja Lutsar
BACKGROUND: Human milk is the preferred nutrition for neonates and a source of bacteria. Research aim: The authors aimed to characterize the molecular epidemiology and genetic content of staphylococci in the human milk of mothers of preterm and term neonates. METHODS: Staphylococci were isolated once per week in the 1st month postpartum from the human milk of mothers of 20 healthy term and 49 preterm neonates hospitalized in the neonatal intensive care unit. Multilocus variable-number tandem-repeats analysis and multilocus sequence typing were used...
May 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28415992/women-epidemiology-lung-cancer-welca-study-reproductive-hormonal-occupational-risk-factors-and-biobank
#15
MULTICENTER STUDY
Isabelle Stücker, Diane Martin, Monica Neri, Pierre Laurent-Puig, Hélène Blons, Martine Antoine, Anne Guiochon-Mantel, Sylvie Brailly-Tabard, Marianne Canonico, Marie Wislez, Jean Trédaniel
BACKGROUND: Lung cancer aetiology and clinical aspects have been mainly studied in men, although specific risk factors probably exist in women. Here we present the rationale, design and organization of the WELCA study (Women Epidemiology Lung CAncer) that has been launched to investigate lung cancer in women, focusing particularly on hormonal and occupational factors. METHODS/DESIGN: WELCA is a population based case-control study and planned to recruit 1000 cases and 1000 controls in three years, based on study power calculation...
April 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28415696/role-of-interleukin-12-gene-polymorphisms-in-the-onset-risk-of-cancer-a-meta-analysis
#16
Yi Zheng, Meng Wang, Tian Tian, Kang Liu, Xinghan Liu, Yajing Zhai, Shuai Lin, Pengtao Yang, Shanli Li, Zhijun Dai, Jun Lu
Many molecular epidemiologic studies have explored the possible links between interleukin-12 (IL-12) polymorphisms and various cancers. However, results from these studies remain inconsistent. This meta-analysis is aimed to shed light on the associations between three common loci (rs568408, rs2243115, rs3212227) of IL-12 gene and overall cancer risk. Our meta-analysis finally included 33 studies comprising 10,587 cancer cases and 12,040 cancer-free controls. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the cancer risk...
March 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28412407/prevalence-molecular-epidemiology-and-intra-hospital-acquisition-of-klebsiella-pneumoniae-strains-producing-carbapenemases-in-an-italian-teaching-hospital-from-january-2015-to-september-2016
#17
Andrea Bartolini, Monica Basso, Elisa Franchin, Nicola Menegotto, Anna Ferrari, Ettore De Canale, Samantha Andreis, Renzo Scaggiante, Stefania Stefani, Giorgio Palù, Saverio Giuseppe Parisi
OBJECTIVES: We described Klebsiella pneumoniae producing carbapenemases (CPKP) spread from 01/01/2015 to 13/09/16 in a tertiary level hospital. METHODS: The first positive surveillance rectal swab (SRS) or clinical sample (CS) collected in medical department (MD), surgical department (SD) and intensive care department (ICD) was included in the study. A validated in-house Real-Time PCR method was used to detect carbapenemases, multilocus sequence typing (MLST) was used for further characterization of the strains...
April 12, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28412384/molecular-epidemiology-of-penicillinase-producing-neisseria-gonorrhoeae-isolates-in-france
#18
Maité Micaëlo, Agathe Goubard, Guy La Ruche, Erick Denamur, Olivier Tenaillon, Emmanuelle Cambau, Hervé Jacquier, Béatrice Bercot
OBJECTIVES: Characterising the molecular epidemiology of antibiotic resistance is crucial for a better understanding of the evolution and spread of resistance in Neisseria gonorrhoeae. Here, we examine the molecular epidemiology of penicillinase-producing N. gonorrhoeae (PPNG) isolates in France. METHODS: We investigated 176 PPNG isolates collected between 2010 and 2012 by the National Reference Centre in France. Genotyping was performed using the NG-MAST technique, blaTEM genes were Sanger-sequenced, and plasmids were characterized by PCR-typing...
April 13, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28409124/hospital-dissemination-of-tst-1-positive-clonal-complex-5-cc5-methicillin-resistant-staphylococcus-aureus
#19
Min Wang, Yi Zheng, Jose R Mediavilla, Liang Chen, Barry N Kreiswirth, Yajun Song, Ruifu Yang, Hong Du
Methicillin-resistant Staphylococcus aureus (MRSA), is one of the most prevalent clinical pathogens isolated from hospital settings, and has increasingly identified in community settings. In China, the SCCmecIII-ST239 strains are disseminated in different geographic regions, accounting for >75% of all MRSA isolates in some national studies. Here we characterized 150 non-duplicate MRSA isolates collected from February 2012 to May 2013 in a tertiary hospital in Suzhou, Eastern China, to explore the molecular epidemiology...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28404232/pcr-based-molecular-characterization-of-blastocystis-hominis-subtypes-in-southwest-of-iran
#20
Shahram Khademvatan, Rahim Masjedizadeh, Ehsan Yousefi-Razin, Hamidreza Mahbodfar, Fakher Rahim, Elham Yousefi, Masoud Foroutan
Blastocystis hominis is the most common intestinal parasite found in humans and many other hosts. Pathogenicity of Blastocystis sp. remains controversial and it has been suggested that it may be associated with certain subtypes of organism. The aim of this study was to evaluate the molecular epidemiology of B. hominis and its subtype distribution in Ahvaz, southwest of Iran. During 2012-2014, a total of 481 samples were collected from patients referred to the medical laboratory centers in Ahvaz for stool examination...
April 9, 2017: Journal of Infection and Public Health
keyword
keyword
99993
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"