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https://www.readbyqxmd.com/read/28332898/herpes-simplex-virus-1-and-cytomegalovirus-dnas-detection-in-the-inner-ear-of-implanted-patients-with-non-congenital-infection
#1
Walter Di Nardo, Roberta Anzivino, Paola Cattani, Rosaria Santangelo, Eugenio De Corso, Gaetano Paludetti
CONCLUSIONS: The detection of cytomegalovirus (CMV) and herpes simplex virus-1 (HSV-1) genome in perilymph of patients with negative serology or clinical history for congenital infections supports the hypothesis that Herpesviridae, even after acquired postnatal infections, could remain in latent phase in the spiral ganglion and damage the cochlea by a possible subsequent reactivation. Further studies are needed to identify the markers of such reactivation. OBJECTIVE: To identify the presence of certain viral species in the endolabyrinthic fluid of deaf patients with non-congenital infection...
March 23, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28332161/real-time-pcr-identification-of-six-malassezia-species
#2
Amin Ilahi, Inès Hadrich, Sourour Neji, Houaida Trabelsi, Fattouma Makni, Ali Ayadi
Lipophilic yeast Malassezia species is widely found on the skin surface of humans and other animals. This fungus can cause pityriasis versicolor, Malassezia folliculitis, and seborrheic dermatitis. Still now, there is a problem with species identification of Malassezia with conventional methods. We developed a real-time polymerase chain reaction (PCR) assay with multiple hybridization probes for detecting M. globosa, M. furfur, M. restricta, M. sympodialis, M. slooffiae, and M. pachydermatis. The amplification curves and specific melting peaks of the probes hybridized with real-time PCR product were used for species identifications...
March 22, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28330895/speciation-and-strain-typing-of-staphylococcus-agnetis-and-staphylococcus-hyicus-isolated-from-bovine-milk-using-a-novel-multiplex-pcr-and-pulsed-field-gel-electrophoresis
#3
P R F Adkins, J R Middleton, M J Calcutt, G C Stewart, L K Fox
Staphylococcus hyicus and Staphylococcus agnetis are two coagulase variable staphylococcal species that can be isolated from bovine milk and are difficult to differentiate. The objectives of this study were to characterize isolates of bovine milk origin from a collection that had previously been characterized as coagulase positive S. hyicus based on phenotypic speciation methods and to develop a PCR-based method for differentiating S. hyicus, S. agnetis, and S. aureus. Isolates (n = 62) were selected from a previous study in which milk samples were collected from cows on 15 dairy herds...
March 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28330894/targeted-enrichment-for-pathogen-detection-and-characterization-in-three-felid-species
#4
Justin S Lee, Ryan S Mackie, Thomas Harrison, Basir Shariat, Trey Kind, Timo Kehl, Martin Löchelt, Christina Boucher, Sue VandeWoude
Traditional diagnostic assays often lack sensitivity and can be difficult to multiplex across many pathogens. Next-generation sequencing (NGS) can overcome some of these problems but has limited application detecting low-copy-number pathogens in complex samples. Targeted genome capture (TGC) utilizes oligonucleotide probes to enrich specific nucleic acids in heterogeneous extracts and can therefore increase the proportion of NGS reads for low-abundance targets. While prior studies have demonstrated the utility of this technology for detection of novel pathogens in human clinical samples, the capacity and practicality of TGC-NGS in a veterinary diagnostic setting has not yet been evaluated...
March 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28330283/multiplex-pcr-for-simultaneous-identification-of-e-coli-o157-h7-salmonella-spp-and-l-monocytogenes-in-food
#5
Thuy Trang Nguyen, Vo Van Giau, Tuong Kha Vo
The rapid detection of pathogens in food is becoming increasingly critical for ensuring the safety of consumers, since the majority of food-borne illnesses and deaths are caused by pathogenic bacteria. Hence, rapid, sensitive, inexpensive and convenient approaches to detect food-borne pathogenic bacteria is essential in controlling food safety. In this study, a multiplex PCR assay for the rapid and simultaneous detection of Escherichia coli O157:H7, Salmonella spp. and Listeria monocytogenes was established...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330075/a-novel-multiplex-pcr-method-for-the-detection-of-virulence-associated-genes-of-escherichia-coli-o157-h7-in-food
#6
Vo Van Giau, Thuy Trang Nguyen, Thi Kim Oanh Nguyen, Thi Thuy Hang Le, Tien Dung Nguyen
Shiga toxin-producing Escherichia coli O157:H7 (E. coli O157:H7) strains are foodborne infectious agents that cause a number of life-threatening diseases, including hemorrhagic colitis (HC) and hemolytic uremic syndrome (HUS). Shiga toxin 1 (stx1), shiga toxin 2 (stx2), or a combination of both are responsible for most clinical symptoms of these diseases. Hence, various diagnostic methods have been developed so far to detect shiga toxins such as cell culture, ELISA, Rapid Latex Agglutination (RPLA) and hybridization, but due to high costs and labor time in addition to low sensitivity, they have not received much attention...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329274/trichinella-nativa-outbreak-with-rare-thrombotic-complications-associated-with-meat-from-a-black-bear-hunted-in-northern-ontario
#7
Daniel Dalcin, Dante S Zarlenga, Nicholas C Larter, Eric Hoberg, Daniel A Boucher, Samuel Merrifield, Rachel Lau, Filip Ralevski, Karamjit Cheema, Kevin L Schwartz, Andrea K Boggild
Background: Although trichinellosis is known to cause thrombotic disease, serious thrombotic events are rare and have not been previously associated with Trichinella nativa infection. Methods: Patient interviews and medical chart reviews were conducted on 10 men who became ill following consumption of a common source of black bear meat. Trichinella serology on patient sera as well as PCR and larval identification of the meat samples was conducted. Results: All 10 exposed individuals developed an acute illness clinically compatible with trichinellosis, characterized by fever, abdominal pain, and diarrhea, along with eosinophilia ranging from 0...
February 22, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28327639/evaluation-of-different-oligonucleotide-base-substitutions-at-cpg-binding-sites-in-multiplex-bisulfite-pcr-sequencing
#8
Jennifer Lu, Kelin Ru, Ida Candiloro, Alexander Dobrovic, Darren Korbie, Matt Trau
Multiplex bisulfite-PCR sequencing is a convenient and scalable method for the quantitative determination of the methylation state of target DNA regions. A challenge of this application is the presence of CpGs in the same region where primers are being placed. A common solution to the presence of CpGs within a primer-binding region is to substitute a base degeneracy at the cytosine position. However, the efficacy of different substitutions and the extent to which bias towards methylated or unmethylated templates may occur has never been evaluated in bisulfite multiplex sequencing applications...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28324958/ultrafast-oscillatory-flow-pcr-for-amplication-of-urine-short-tandem-repeats
#9
Haoyu Tang, Tao Dong
The short tandem repeats (STRs) in human urine which is the most sensitive body fluid can be serviced as biomarkers for the individual identification. PCR microchips are automated, sensitive and rapid. In this report, COMSOL with Finite Element Analysis (FEA) is employed to study the temperature distribution of the base layer to optimize the structure of the microfluidic chip. Meanwhile, the oscillatory PCR microdevice is preliminary tested by DNA samples extracted from urine with the FTA papers and CSF1PO, TPOX, TH01 Multiplex kits...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28322347/chronic-exposure-to-a-neonicotinoid-increases-expression-of-antimicrobial-peptide-genes-in-the-bumblebee-bombus-impatiens
#10
William R Simmons, David R Angelini
Bumblebees are important pollinators in wild and agricultural settings. In recent decades pollinator declines have been linked to the effects of increased pesticide use and the spread of disease. Synergy between these factors has been suggested, but no physiological mechanism has been identified. This study examines the connection between neonicotinoid exposure and innate immune function in the bumblebee Bombus impatiens, which is an important wild and commercial pollinator in eastern North America. Experimental colonies in the field were enclosed and provided pollen and sugar syrup containing an agriculturally relevant range of imidacloprid concentrations...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28320414/epidermal-growth-factor-receptor-and-epididymis-invasion-as-prognostic-biomarkers-in-clinical-stage-i-testicular-germ-cell-tumours
#11
Miguel F Sanmamed, E Esteban, E Uriol, R Zarate, M Capelan, C Muriel, G Crespo, J P Berros, P Pardo-Coto, Q Perez, C Alvarez-Fernández, P Jiménez Fonseca, M Luque, A Astudillo
BACKGROUND: Inguinal orchiectomy is curative in 70-80% of clinical stage I testicular germ cell tumours (CS I TGCT). The identification of patients who are at low risk of relapse is critical to avoid unnecessary treatment. The aim of this study is to explore EGFR, hMLH-1/hMSH-2 and microsatellite instability (MSI) as potential prognostic factors of recurrence in CS I TGCT. METHODS: Fifty-six CS I TGCT patients who underwent inguinal orchiectomy were included in this study...
March 20, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28320411/human-rotavirus-strains-circulating-in-venezuela-after-vaccine-introduction-predominance-of-g2p-4-and-reemergence-of-g1p-8
#12
Esmeralda Vizzi, Oscar A Piñeros, M Daniela Oropeza, Laura Naranjo, José A Suárez, Rixio Fernández, José L Zambrano, Argelia Celis, Ferdinando Liprandi
BACKGROUND: Rotavirus (RV) is the most common cause of severe childhood diarrhea worldwide. Despite Venezuela was among the first developing countries to introduce RV vaccines into their national immunization schedules, RV is still contributing to the burden of diarrhea. Concerns exist about the selective pressure that RV vaccines could exert on the predominant types and/or emergence of new strains. RESULTS: To assess the impact of RV vaccines on the genotype distribution 1 year after the vaccination was implemented, a total of 912 fecal specimens, collected from children with acute gastroenteritis in Caracas from February 2007 to April 2008, were screened, of which 169 (18...
March 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28317797/analysis-of-a-novel-multiplex-polymerase-chain-reaction-assay-as-a-sensitive-tool-for-the-diagnosis-of-indeterminate-and-tuberculoid-forms-of-leprosy
#13
V Sundeep Chaitanya, Luz Cuello, Madhusmita Das, A Sudharsan, Pavithrra Ganesan, K Kanmani, Lakshmi Rajan, Mannam Ebenezer
OBJECTIVE/BACKGROUND: Clinical diagnosis of indeterminate and tuberculoid leprosy is often difficult due to limited and confounding signs and symptoms. In the current study, we evaluated the utility of new multiplex polymerase chain reaction (PCR) using Mycobacterium leprae-specific DNA sequences in the pseudogene regions of ML1545, ML2180, and ML2179 for PCR-based diagnosis of indeterminate leprosy (IND) and leprosy cases across the immunological spectrum. The sensitivity was compared with that of RLEP PCR...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317027/the-type-a-and-type-b-polysaccharide-capsules-predominate-in-an-international-collection-of-invasive-kingella-kingae-isolates
#14
Eric A Porsch, Kimberly F Starr, Pablo Yagupsky, Joseph W St Geme
Kingella kingae is an encapsulated Gram-negative bacterium and an important etiology of osteoarticular infections in young children. A recent study examining a diverse collection of carrier and invasive K. kingae isolates from Israel revealed four distinct polysaccharide capsule types. In this study, to obtain a global view of K. kingae capsule type diversity, we examined an international collection of isolates using a multiplex PCR approach. The collection contained all four previously identified capsule types and no new capsule types...
March 2017: MSphere
https://www.readbyqxmd.com/read/28316082/dacomitinib-induced-diarrhoea-is-associated-with-altered-gastrointestinal-permeability-and-disruption-in-ileal-histology-in-rats
#15
Ysabella Z A Van Sebille, Rachel J Gibson, Hannah R Wardill, Kate R Secombe, Imogen A Ball, Dorothy M K Keefe, John W Finnie, Joanne M Bowen
Dacomitinib - an irreversible pan-ErbB tyrosine kinase inhibitor (TKI) - causes diarrhoea in 75% of patients. Dacomitinib-induced diarrhoea has not previously been investigated and the mechanisms remain poorly understood. The present study aimed to develop an in-vitro and in-vivo model of dacomitinib-induced diarrhoea to investigate underlying mechanisms. T84 cells were treated with 1-4 μM dacomitinib and resistance and viability were measured using transepithelial electrical resistance (TEER) and XTT assays...
March 17, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28303830/multiplex-polymerase-chain-reaction-for-the-detection-of-high-risk-human-papillomavirus-types-in-formalin-fixed-paraffin-embedded-cervical-tissues
#16
Mini P Singh, Nalini Gupta, T Deepak, Archit Kumar, Radha Kanta Ratho
Detecting high-risk-human papillomavirus (HPV) types has become an integral part of the cervical cancer screening programmes. This study aimed to develop a multiplex polymerase chain reaction (PCR) for identification of HPV types 16 and 18 along with the beta globin gene in formalin-fixed and paraffin-embedded cervical biopsy specimens. A total of 59 samples from patients with cervical abnormalities were tested. HPV 16 positivity was 50% in cervical cancers and 52.9% in cervical intraepithelial neoplasia. Our multiplex PCR protocol can be used as a simple and cost-effective tool for high-risk-HPV detection in cervical cancer screening programmes...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28303191/vim-1-carbapenemase-producing-escherichia-coli-in-gulls-from-southern-france
#17
Marion Vittecoq, Chrislène Laurens, Lionel Brazier, Patrick Durand, Eric Elguero, Audrey Arnal, Frédéric Thomas, Salim Aberkane, Nicolas Renaud, Franck Prugnolle, Jérôme Solassol, Hélène Jean-Pierre, Sylvain Godreuil, François Renaud
Acquired carbapenemases currently pose one of the most worrying public health threats related to antimicrobial resistance. A NDM-1-producing Salmonella Corvallis was reported in 2013 in a wild raptor. Further research was needed to understand the role of wild birds in the transmission of bacteria resistant to carbapenems. Our aim was to investigate the presence of carbapenem-resistant Escherichia coli in gulls from southern France. In 2012, we collected 158 cloacal swabs samples from two gull species: yellow-legged gulls (Larus michahellis) that live in close contact with humans and slender-billed gulls (Chroicocephalus genei) that feed at sea...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28303131/multiplexed-single-intact-cell-droplet-digital-pcr-music-ddpcr-method-for-specific-detection-of-enterohemorrhagic-e-coli-ehec-in-food-enrichment-cultures
#18
Tanis C McMahon, Burton W Blais, Alex Wong, Catherine D Carrillo
Foodborne illness attributed to enterohemorrhagic E. coli (EHEC), a highly pathogenic subset of Shiga toxin-producing E. coli (STEC), is increasingly recognized as a significant public health issue. Current microbiological methods for identification of EHEC in foods often use PCR-based approaches to screen enrichment broth cultures for characteristic gene markers [i.e., Shiga toxin (stx) and intimin (eae)]. However, false positives arise when complex food matrices, such as beef, contain mixtures of eae-negative STEC and eae-positive E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28301553/multiplex-pcr-as-a-tool-for-the-diagnosis-of-leishmania-spp-kdna-and-the-gapdh-housekeeping-gene-of-mammal-hosts
#19
Renata de Cássia-Pires, Myllena de Fátima Alheiros Dias de Melo, Raquel da Hora Barbosa, André Luiz Rodrigues Roque
BACKGROUND: The PCR assays usually employed for Leishmania diagnosis does not simultaneously detect a constitutive gene that would certify the viability of the DNA sample. We present a multiplex PCR approach for the simultaneous diagnosis of the Leishmania sp. kDNA fragment and a catalytic domain segment of a conserved region of the mammalian gapdh gene. METHODOLOGY: The proposed multiplex protocol was designed through in silico PCR. The annealing temperature, concentration of primer pairs, number of cycles, distinct polymerase enzymes and premix kit were defined to achieve an optimal reaction...
2017: PloS One
https://www.readbyqxmd.com/read/28298454/in-vitro-activity-of-imipenem-against-carbapenemase-positive-enterobacteriaceae-smart-global-surveillance-program-2008-2014
#20
James A Karlowsky, Sibylle H Lob, Krystyna M Kazmierczak, Robert E Badal, Katherine Young, Mary R Motyl, Daniel F Sahm
The Study for Monitoring Antimicrobial Resistance Trends (SMART) global surveillance program collected 103,960 isolates of Enterobacteriaceae from 2008 to 2014. From this isolate collection all ertapenem-non-susceptible isolates (MIC, ≥1 μg/ml; n = 3,428) and 9,371 isolates of Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, and Proteus mirabilis with an ertapenem-susceptible extended-spectrum β-lactamase (ESBL)-positive phenotype were assessed for the presence of common carbapenemase genes using the Check-MDR CT101 microarray (Check-Points, Wageningen, the Netherlands) and published multiplex PCR assays...
March 15, 2017: Journal of Clinical Microbiology
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