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https://www.readbyqxmd.com/read/29777439/fecal-and-mucosa-associated-intestinal-microbiota-in-patients-with-diarrhea-predominant-irritable-bowel-syndrome
#1
Nitsan Maharshak, Yehuda Ringel, David Katibian, Ashley Lundqvist, R Balfour Sartor, Ian M Carroll, Tamar Ringel-Kulka
BACKGROUND: Irritable bowel syndrome (IBS) has been associated with changes in the intestinal microbiota. Only a few studies have explored differences in the mucosa-associated microbiota between IBS patients and healthy controls (HC). AIMS: To characterize and compare the microbiota in mucosal and fecal samples from carefully selected patients with IBS-D and HC. METHODS: The cohort was composed of 23 diarrhea-predominant IBS (IBS-D) patients and 24 HC...
May 17, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29775793/analysis-of-dna-methylation-at-specific-loci-in-stool-samples-detects-colorectal-cancer-and-high-grade-dysplasia-in-patients-with-inflammatory-bowel-disease
#2
John B Kisiel, Pasquale Klepp, Hatim T Allawi, William R Taylor, Maria Giakoumopoulos, Tamara Sander, Tracy C Yab, Bjorn A Moum, Graham P Lidgard, Stephan Brackmann, Douglas W Mahoney, Arne Roseth, David A Ahlquist
BACKGROUND & AIMS: Patients with inflammatory bowel diseases (IBD), including ulcerative colitis (UC) and Crohn's disease (CD), are at increased risk for colorectal cancer (CRC). Analyses of DNA methylation patterns in stool samples have been reported to detect CRC in patients with IBD. We sought to validate these findings in larger cohorts and assess the accuracy of analysis of DNA methylation patterns in stool for detection of CRC and high-grade dysplasia (HGD) normalized to methylation level at ZDHHC1...
May 15, 2018: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29774829/novel-parvovirus-related-to-primate-bufaviruses-in-dogs
#3
Vito Martella, Gianvito Lanave, Eszter Mihalov-Kovács, Szilvia Marton, Renáta Varga-Kugler, Eszter Kaszab, Barbara Di Martino, Michele Camero, Nicola Decaro, Canio Buonavoglia, Krisztián Bányai
A novel protoparvovirus species, related genetically to human bufaviruses, was identified in dogs with respiratory signs. The canine bufavirus was distantly related to the well-known canine protoparvovirus, canine parvovirus type 2, sharing low amino acid identities in the nonstructural protein 1 (40.6%) and in the capsid protein 1 (33.4%). By screening collections of fecal, nasal, and oropharyngeal samples obtained from juvenile dogs (<1 year of age), canine bufavirus DNA appeared as a common component of canine virome...
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29774288/molecular-analysis-of-giardia-duodenalis-isolates-from-symptomatic-and-asymptomatic-children-from-la-habana-cuba
#4
Luis Enrique Jerez Puebla, Fidel A Núñez, Lissette Pérez Santos, Lázara Rojas Rivero, Isabel Martínez Silva, Lucía Ayllón Valdés, Iraís Atencio Millán, Norbert Müller
Giardiasis is considered the most common intestinal parasitic disease in humans worldwide. In Cuba, this infection has particularly a strong clinical impact on the child population. Giardia duodenalis is a highly diverse protozoan, which comprises a complex of eight morphologically identical genetic assemblages, further divided into sub-assemblages. The present study used triose phosphate isomerase ( tpi ) and small-subunit ribosomal RNA (SSU rRNA) genes as genetic markers for the identification of G. duodenalis assemblages and sub-assemblages in correlation with clinical and epidemiological data in children attended at the Paediatric Hospital "William Soler" and at Pedro Kouri Institute, between 2015 and 2016...
August 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29774025/co-stimulation-impaired-bone-marrow-derived-dendritic-cells-prevent-dextran-sodium-sulfate-induced-colitis-in-mice
#5
Carl Engman, Yesica Garciafigueroa, Brett Eugene Phillips, Massimo Trucco, Nick Giannoukakis
Dendritic cells (DC) are important in the onset and severity of inflammatory bowel disease (IBD). Tolerogenic DC induce T-cells to become therapeutic Foxp3+ regulatory T-cells (Tregs). We therefore asked if experimental IBD could be prevented by administration of bone marrow-derived DC generated under conventional GM-CSF/IL-4 conditions but in the presence of a mixture of antisense DNA oligonucleotides targeting the primary transcripts of CD40, CD80, and CD86. These cell products (which we call AS-ODN BM-DC) have demonstrated tolerogenic activity in preventing type 1 diabetes and preserving beta cell mass in new-onset type 1 diabetes in the NOD mouse strain, in earlier studies...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29765909/shiga-toxin-producing-escherichia-coli-infection-in-j%C3%A3-nk%C3%A3-ping-county-sweden-occurrence-and-molecular-characteristics-in-correlation-with-clinical-symptoms-and-duration-of-stx-shedding
#6
Xiangning Bai, Sara Mernelius, Cecilia Jernberg, Ing-Marie Einemo, Stefan Monecke, Ralf Ehricht, Sture Löfgren, Andreas Matussek
Shiga toxin-producing Escherichia coli (STEC) cause bloody diarrhea (BD), hemorrhagic colitis (HC), and even hemolytic uremic syndrome (HUS). In Nordic countries, STEC are widely spread and usually associated with gastrointestinal symptoms and HUS. The objective of this study was to investigate the occurrence of STEC in Swedish patients over 10 years of age from 2003 through 2015, and to analyze the correlation of critical STEC virulence factors with clinical symptoms and duration of stx shedding. Diarrheal stool samples were screened for presence of stx by real-time PCR...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29763272/colorectal-cancer-screening-and-prevention
#7
Thad Wilkins, Danielle McMechan, Asif Talukder
Colorectal cancer is a common cause of morbidity and mortality in the United States. Most colorectal cancers arise from preexisting adenomatous or serrated polyps. The incidence and mortality of colorectal cancer can be reduced with screening of average-risk adults 50 to 75 years of age. Randomized controlled trials show evidence of reduced colorectal cancer-specific mortality with guaiac-based fecal occult blood tests and flexible sigmoidoscopy. There are no randomized controlled trials on the effectiveness of colonoscopy to reduce colorectal cancer-specific mortality; however, several randomized controlled trials comparing colonoscopy with other strategies are in progress...
May 15, 2018: American Family Physician
https://www.readbyqxmd.com/read/29742865/detection-of-cryptosporidium-spp-in-diarrheic-immunocompetent-patients-in-beni-suef-egypt-insight-into-epidemiology-and-diagnosis
#8
Samah S Abdel Gawad, Mousa A M Ismail, Naglaa F A Imam, Ahmed H A Eassa, Enas Yahia Abu-Sarea
Cryptosporidium species is an important cause of gastrointestinal infections globally. This study aimed to shed light on its role in diarrheic immunocompetent patients in Beni-Suef, Egypt and to compare three diagnostic methods. Two hundred diarrheic patients, 37±16.8 year old, were enrolled. Stool samples were examined by light microscopy, using modified Ziehl-Neelsen stain (MZN) for Cryptosporidium spp. oocysts. Coproantigens were detected by sandwich ELISA. DNA molecular diagnosis was done by nested PCR...
April 2018: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29738438/proctitis-caused-by-mycobacterium-avium-intracellulare-in-an-hiv-infected-patient
#9
Jose Armando Gonzales Zamora, Clara Milikowski
Infectious proctitis is usually associated with sexually transmitted diseases, especially in HIV-infected individuals. Limited information is found about the role of Mycobacterium avium-intracellulare as a causative agent for this condition. Here, we report the case of an HIV-infected patient with a CD4 count of 304 cells/uL and undetectable HIV viral load, who presented with constipation and painful defecation. Endoscopic evaluation was significant for shallow rectal ulcerations. Histopathology revealed poorly formed granulomas...
May 8, 2018: Diseases (Basel)
https://www.readbyqxmd.com/read/29720900/update-on-sporadic-colorectal-cancer-genetics
#10
REVIEW
Karin M Hardiman
Our understanding of the genetics of colorectal cancer has changed dramatically over recent years. Colorectal cancer can be classified in multiple different ways. Along with the advent of whole-exome sequencing, we have gained an understanding of the scale of the genetic changes found in sporadic colorectal cancer. We now know that there are multiple pathways that are commonly involved in the evolution of colorectal cancer including Wnt/β-catenin, RAS, EGFR, and PIK3 kinase. Another recent leap in our understanding of colorectal cancer genetics is the recognition that many, if not all tumors, are actually genetically heterogeneous within individual tumors and also between tumors...
May 2018: Clinics in Colon and Rectal Surgery
https://www.readbyqxmd.com/read/29718129/giardia-cryptosporidium-quik-chek%C3%A2-assay-is-more-specific-than-qpcr-for-rapid-point-of-care-diagnosis-of-cryptosporidiosis-in-infants-in-bangladesh
#11
Mamun Kabir, Emtiaz Ahmed, Biplob Hossain, Masud Alam, Shahnawaz Ahmed, Mami Taniuchi, Carol A Gilchrist, Eric R Houpt, A S G Faruque, William A Petri, Rashidul Haque
Background: Cryptosporidiumis a major cause of childhood diarrhea. Current modes of cryptosporidiosis diagnosis involve procedures which are costly and require both a well-equipped laboratory and technical expertise. Therefore, a cost effective, user friendly and rapid method for point-of-care detection of Cryptosporidium species in fecal samples is desirable. Methodology: A total of 832 diarrheal stool specimens collected from 200 children aged below two years were tested by Giardia/Cryptosporidium QUIK CHEK®, ELISA and qPCR to compare the performance of the individual techniques...
April 27, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29692304/diagnostic-and-treatment-monitoring-potential-of-a-stool-based-quantitative-polymerase-chain-reaction-assay-for-pulmonary-tuberculosis
#12
Andrew R DiNardo, Alexander W Kay, Gugu Maphalala, Nadine M Harris, Celia Fung, Godwin Mtetwa, Pilar Ustero, Sindisiwe Dlamini, Ngan Ha, Edward A Graviss, Rojelio Mejia, Anna M Mandalakas
A quantifiable, stool-based, Mycobacterium tuberculosis ( Mtb ) test has potential complementary value to respiratory specimens. Limit of detection (LOD) was determined by spiking control stool. Clinical test performance was evaluated in a cohort with pulmonary tuberculosis (TB) ( N = 166) and asymptomatic household TB child contacts ( N = 105). Stool-quantifiable polymerase chain reaction (qPCR) results were compared with sputum acid-fast bacilli (AFB) microscopy, GeneXpert MTB/RIF (Xpert MTB/RIF), and cultures...
April 23, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29682571/the-association-of-gut-microbiota-with-nonalcoholic-steatohepatitis-in-thais
#13
Abhasnee Sobhonslidsuk, Suwannee Chanprasertyothin, Tanjitti Pongrujikorn, Piyaporn Kaewduang, Kwannapa Promson, Supanna Petraksa, Boonsong Ongphiphadhanakul
Objectives: Nonalcoholic steatohepatitis (NASH) can progress to advanced fibrosis; the link between intestinal bacterial overgrowth and NASH has been proposed. Gut microbiota may promote inflammation and provoke disease progression. We evaluated gut microbiota pattern in NASH and its influencing factors. Methods: A case-controlled study with sixteen NASH and eight control subjects was done. We performed DNA extraction from stool samples and bacterial 16S rRNA sequencing using MiSeq™...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29682507/bacterial-microbiome-dynamics-in-post-pull-through-hirschsprung-associated-enterocolitis-haec-an-experimental-study-employing-the-endothelin-receptor-b-null-mouse-model
#14
Zhi Cheng, Lifu Zhao, Deepti Dhall, Paul M Ruegger, James Borneman, Philip K Frykman
Purpose: Hirschsprung-associated enterocolitis (HAEC) is the most frequent potentially life-threatening complication in children with Hirschsprung disease (HSCR) even after definitive corrective surgery. Mounting evidence suggests that intestinal microbiota likely contribute to the etiology of enterocolitis, so the aim of this study was to use a mouse model of post pull-through HAEC to compare the fecal bacterial communities of animals which developed HAEC to those free of enterocolitis...
2018: Frontiers in Surgery
https://www.readbyqxmd.com/read/29681951/lateral-flow-loop-mediated-isothermal-amplification-test-with-stem-primers-detection-of-cryptosporidium-species-in-kenyan-children-presenting-with-diarrhea
#15
Timothy S Mamba, Cecilia K Mbae, Johnson Kinyua, Erastus Mulinge, Gitonga Nkanata Mburugu, Zablon K Njiru
Background. Cryptosporidium is a protozoan parasite and a major cause of diarrhea in children and immunocompromised patients. Current diagnostic methods for cryptosporidiosis such as microscopy have low sensitivity while techniques such as PCR indicate higher sensitivity levels but are seldom used in developing countries due to their associated cost. A loop-mediated isothermal amplification (LAMP) technique, a method with shorter time to result and with equal or higher sensitivity compared to PCR, has been developed and applied in the detection of Cryptosporidium species...
2018: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29679429/molecular-diagnosis-of-strongyloides-stercoralis-among-transplant-candidates
#16
Fabiana M Paula, Fernanda M Malta, Priscilla D Marques, Gessica B Melo, Marcelo A Corral, Maiara Gottardi, João R R Pinho, Elenice M N Gonçalves, Vera L P Castilho, Ligia C Pierrotti, Edson Abdala, Silvia F Costa, Pedro P Chieffi, Ronaldo C B Gryschek
Strongyloidiasis can occur without any symptoms or as a potentially fatal hyperinfection or disseminated infection, principally in immunosuppressed patients. Our study aimed to evaluate the application of conventional polymerase chain reaction (cPCR) and real-time PCR (qPCR). Polymerase chain reaction (PCR) and real-time PCR (qPCR) targeting the 18S rRNA gene for detection of Strongyloides stercoralis infection among transplant candidates were applied in stool samples obtained from 150 transplant candidates, preliminarily analyzed by parasitological methods...
April 20, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29678513/review-of-blood-based-colorectal-cancer-screening-how-far-are-circulating-cell-free-dna-methylation-markers-from-clinical-implementation
#17
REVIEW
Mai-Britt Worm Ørntoft
Colorectal cancer (CRC) is a leading cause of cancer related deaths worldwide, and late stages (III-IV) in particular have low 5-year survival rates. Stage shifting by CRC screening programs has proven effective by decreasing morbidity and mortality and in many countries national CRC screening programs have been implemented. Currently, European, Asian, and American authorities recommend screening for CRC using fecal occult blood testing, sigmoidoscopy, or colonoscopy. Because these approaches all have weaknesses (eg, poor compliance, high costs, test invasiveness), much effort has been put into the development of alternative screening approaches, many of which are blood-based...
March 2, 2018: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/29670890/correlations-between-microbial-communities-in-stool-and-clinical-indicators-in-patients-with-metabolic-syndrome
#18
Lang Lin, Zai-Bo Wen, Dong-Jiao Lin, Jiang-Ting Dong, Jie Jin, Fei Meng
AIM: To analyze the bacterial community structure and distribution of intestinal microflora in people with and without metabolic syndrome and combined these data with clinical indicators to determine relationships between selected bacteria and metabolic diseases. METHODS: Faecal samples were collected from 20 patients with metabolic syndrome and 16 controls at Cangnan People's Hospital, Zhejiang Province, China. DNA was extracted and the V3-V4 regions of the 16S rRNA genes were amplified for high throughput sequencing...
April 16, 2018: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29667371/biases-from-different-dna-extraction-methods-in-intestine-microbiome-research-based-on-16s-rdna-sequencing-a-case-in-the-koi-carp-cyprinus-carpio-var-koi
#19
Zhuoran Han, Jingfeng Sun, Aijun Lv, Anli Wang
This study examined the technical bias associated with different DNA extraction methods used in microbiome research. Three methods were used to extract genomic DNA from the same intestinal microbiota sample that was taken from the koi carp Cyprinus carpio var. koi, after which their microbial diversity and community structure were investigated on the basis of a 16S rDNA high-throughput sequencing analysis. Biased results were observed in relation to the number of reads, alpha diversity indexes and taxonomic composition among the three DNA extraction protocols...
April 17, 2018: MicrobiologyOpen
https://www.readbyqxmd.com/read/29666764/evaluation-of-a-therapy-for-idiopathic-chronic-enterocolitis-in-rhesus-macaques-macaca-mulatta-and-linked-microbial-community-correlates
#20
Joshua M Taylor, Erik L Clarke, Kate Baker, Abigail Lauder, Dorothy Kim, Aubrey Bailey, Gary D Wu, Ronald G Collman, Lara Doyle-Meyers, Kasi Russell-Lodrigue, James Blanchard, Frederic D Bushman, Rudolf Bohm
Idiopathic chronic enterocolitis (ICE) is one of the most commonly encountered and difficult to manage diseases of captive rhesus macaques ( Macaca mulatta ). The etiology is not well understood, but perturbations in gut microbial communities have been implicated. Here we evaluated the effects of a 14-day course of vancomycin, neomycin, and fluconazole on animals affected with ICE, comparing treated, untreated, and healthy animals. We performed microbiome analysis on duodenal and colonic mucosal samples and feces in order to probe bacterial and/or fungal taxa potentially associated with ICE...
2018: PeerJ
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