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https://www.readbyqxmd.com/read/28102513/incidence-of-cryptosporidium-andersoni-in-diarrheal-patients-from-southern-assam-india-a-molecular-approach
#1
G Hussain, S Roychoudhury, B Singha, J Paul
The distribution and public health significance of Cryptosporidium species and genotypes in humans and bovine differ across geographical areas. Cryptosporidium species causes a disease known as cryptosporidiosis in humans and animals. To characterize the prevalence of cryptosporidiosis in humans in southern Assam, India, stool samples (n = 1119) of diarrhea patients were collected from different hospitals and from the community during the period January 2014 to July 2016. Fecal smears were examined microscopically for Cryptosporidium species using modified acid fast staining and were screened to ascertain the presence of Cryptosporidium antigen by enzyme-linked immunosorbent assay (ELISA)...
January 19, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28100811/the-molecular-speciation-of-soil-transmitted-helminth-eggs-collected-from-school-children-across-six-endemic-countries
#2
Santosh George, Peter Geldhof, Marco Albonico, Shaali M Ame, Jeffrey M Bethony, Dirk Engels, Zeleke Mekonnen, Antonio Montresor, Sopheak Hem, Louis-Albert Tchuem-Tchuenté, Nguyen Thu Huong, Gagandeep Kang, Jozef Vercruysse, Bruno Levecke
BACKGROUND: The diagnosis of soil-transmitted helminths (STHs; Ascaris, Trichuris and hookworms) is traditionally based on the demonstration of eggs in stool using microscopic techniques. While molecular techniques are more appropriate to speciate STH species they are seldom applied. In this study we speciated STH eggs from stool using molecular techniques to gain insights into the distribution of both human and animal STH species in the human host. METHODS: We speciated 207 STH egg isolates from stool collected during the baseline survey of six drug efficacy trials conducted in Brazil, Cambodia, Cameroon, Ethiopia, Tanzania and Vietnam applying a PCR - restriction fragment length polymorphisms based approach...
January 18, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28097082/a-review-of-colorectal-cancer-detection-modalities-stool-dna-and-fecal-immunochemistry-testing-in-adults-over-the-age-of-50
#3
REVIEW
Tyler Janz, Karen Lu, Michael R Povlow, Brittany Urso
Colorectal cancer (CRC) is the third leading cause of cancer death in the United States. Recently, more focus has been placed on developing effective screening tools to detect the presence of both precancerous and cancerous lesions present in the colon and rectum. Colonoscopy has been well established as the gold standard of the colon and rectal cancer screening. However, not all patients are willing to undergo a colonoscopy due to the procedure's invasive nature. Non-invasive screening methods have been developed to appeal to patients who refuse colonoscopy...
December 16, 2016: Curēus
https://www.readbyqxmd.com/read/28077747/first-molecular-identifications-of-necator-americanus-and-ancylostoma-ceylanicum-infecting-rural-communities-in-lower-myanmar
#4
Win Pa Pa Aung, Thi Thi Htoon, Htay Htay Tin, Oranuch Sanpool, Jurairat Jongthawin, Lakkhana Sadaow, Issarapong Phosuk, Rutchanee Ropai, Pewpan M Intapan, Wanchai Maleewong
Hookworms are enteric parasitic roundworms infecting an estimated 400 million persons worldwide. Herein, we provide the first molecular identifications of human hookworms from certain parts of rural Lower Myanmar. DNA was extracted from hookworm-positive stool samples, as determined by microscopy. DNA sequences of the partial internal transcribed spacer 1, full length 5.8S gene, and partial internal transcribed spacer 2 were determined and compared with available hookworm sequences from public databases. Of the 11 polymerase chain reaction-positive samples, eight (Bago Region, N = 4; Mon State, N = 4) yielded sequences with high similarity to those of Necator americanus A further three sequences (Mon State, N = 2; Bago Region, N = 1) showed high similarity with those of Ancylostoma ceylanicum The latter is primarily a parasite of dogs and represents a zoonosis...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28077379/effects-of-supplementation-with-nondigestible-carbohydrates-on-fecal-calprotectin-and-on-epigenetic-regulation-of-sfrp1-expression-in-the-large-bowel-mucosa-of-healthy-individuals
#5
Fiona C Malcomson, Naomi D Willis, Iain McCallum, Long Xie, Idoia Ibero-Baraibar, Wing C Leung, Seamus Kelly, D Michael Bradburn, Nigel J Belshaw, Ian T Johnson, John C Mathers
BACKGROUND: Hyperactive Wnt signaling is frequently observed in colorectal cancer. Higher intakes of dietary fiber [nondigestible carbohydrates (NDCs)] and the fermentation product butyrate are protective against colorectal cancer and may exert their preventative effects via modulation of the Wnt pathway. OBJECTIVES: We investigated the effects of supplementing healthy individuals with 2 NDCs [resistant starch (RS) and polydextrose] on fecal calprotectin concentrations and Wnt pathway-related gene expression...
January 11, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28073382/a-retrospective-study-comparing-agar-plate-culture-indirect-immunofluorescence-and-real-time-pcr-for-the-diagnosis-of-strongyloides-stercoralis-infection
#6
Dora Buonfrate, Francesca Perandin, Fabio Formenti, Zeno Bisoffi
Strongyloides stercoralis is a parasite that can cause death in immunocompromised people. A proper diagnosis is hence essential. The real-time polymerase-chain reaction (RT-PCR) is a novel, promising diagnostic method, that detects the DNA of the parasite in stool samples. In this retrospective study, we compared the sensitivity of agar plate coproculture (APC), an in-house immunofluorescence test (IFAT) and an in-house RT-PCR for the diagnosis of S. stercoralis infection. The study sample was composed by 223 samples...
January 11, 2017: Parasitology
https://www.readbyqxmd.com/read/28044229/genetic-biomarker-prevalence-is-similar-in-fecal-immunochemical-test-positive-and-negative-colorectal-cancer-tissue
#7
Theodore R Levin, Douglas A Corley, Christopher D Jensen, Amy R Marks, Wei K Zhao, Alexis M Zebrowski, Virginia P Quinn, Lawrence W Browne, William R Taylor, David A Ahlquist, Graham P Lidgard, Barry M Berger
BACKGROUND: Fecal immunochemical test (FIT) screening detects most asymptomatic colorectal cancers. Combining FIT screening with stool-based genetic biomarkers increases sensitivity for cancer, but whether DNA biomarkers (biomarkers) differ for cancers detected versus missed by FIT screening has not been evaluated in a community-based population. AIMS: To evaluate tissue biomarkers among Kaiser Permanente Northern California patients diagnosed with colorectal cancer within 2 years after FIT screening...
January 2, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28011577/examining-the-potential-use-and-long-term-stability-of-guaiac-faecal-occult-blood-test-cards-for-microbial-dna-16s-rrna-sequencing
#8
Morag Taylor, Henry M Wood, Stephen P Halloran, Philip Quirke
AIMS: With a growing interest in the influence the gut microbiome has on the development of colorectal cancer (CRC), we investigated the feasibility and stability of isolating and typing microbial DNA from guaiac faecal occult blood test (gFOBt) cards. This has the future potential to screen the microbial populations present in confirmed colorectal neoplasia cases with aims to predict the presence and development of CRC. METHODS: Fresh stool samples from three healthy volunteers were applied to gFOBt cards...
December 23, 2016: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28003424/genomic-variation-in-iba10g2-and-other-patient-derived-cryptosporidium-hominis-subtypes
#9
Per Sikora, Sofia Andersson, Jadwiga Winiecka-Krusnell, Björn Hallström, Cecilia Alsmark, Karin Troell, Jessica Beser, Romanico B G Arrighi
In order to improve genotyping and epidemiological analysis of Cryptosporidium spp., genomic data needs to be generated directly from a broad range of clinical specimens. Utilizing a robust method we developed for the purification and generation of amplified target DNA, we present its application for the successful isolation and whole genome sequencing of 14 different Cryptosporidium hominis patient specimens. Six isolates of subtype IbA10G2 were analyzed together with a single representative of 8 other subtypes: IaA20R3, IaA23R3, IbA9G3 IbA13G3, IdA14, IeA11G3T3, IfA12G1 and IkA18G1...
December 21, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27999144/long-term-follow-up-of-patients-having-false-positive-multi-target-stool-dna-tests-after-negative-screening-colonoscopy-the-long-haul-cohort-study
#10
Thomas G Cotter, Kelli N Burger, Mary E Devens, Julie A Simonson, Kari L Lowrie, Russell I Heigh, Douglas W Mahoney, David H Johnson, David A Ahlquist, John B Kisiel
BACKGROUND: Studies of colorectal cancer (CRC) screening by multi-target stool DNA (MT-sDNA) show false positive (FP) rates of 7-13%. It is unclear whether FP patients are at increased long-term risk of adverse outcomes. METHODS: We compared subsequent clinical events among patients with apparent FP MT-sDNA to those in patients reported as true negative (TN). This was a retrospective cohort study of participants in pre-FDA approval MT-sDNA studies having non-advanced or negative baseline colonoscopy findings from a single referral-center...
December 20, 2016: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/27993874/diagnosis-of-pulmonary-tuberculosis-and-detection-of-resistance-to-rifampin-and-isoniazid-through-direct-molecular-methods-in-stool-samples
#11
Sulaiman Ali Al Yousef, Khalid Abdullah Ali AbdelRahim, Asmaa O Ahmed, Khalid Salmeen Almaary, Ahmed Mohamed Ali Mohamed
BACKGROUND: Tuberculosis (TB) is an infectious disease that is caused by Mycobacterium tuberculosis (M.tb). TB has high morbidity and mortality around the world. OBJECTIVE: To evaluate molecular-based methods performed directly on stool samples for the diagnosis of pulmonary tuberculosis (PTB) and to determine the susceptibility to Rifampicin (RMP) and Isoniazid (INH). STUDY DESIGN: This is a descriptive study evaluating the performance of the PCR-based method for direct PTB diagnosis and to determine the susceptibility of RMP and INH using stool samples from PTB patients...
December 2016: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/27966636/epidemiology-of-two-human-protoparvoviruses-bufavirus-and-tusavirus
#12
Elina Väisänen, Minna Paloniemi, Inka Kuisma, Väinö Lithovius, Arun Kumar, Rauli Franssila, Kamruddin Ahmed, Eric Delwart, Timo Vesikari, Klaus Hedman, Maria Söderlund-Venermo
Two human parvoviruses were recently discovered by metagenomics in Africa, bufavirus (BuV) in 2012 and tusavirus (TuV) in 2014. These viruses have been studied exclusively by PCR in stool and detected only in patients with diarrhoea, although at low prevalence. Three genotypes of BuV have been identified. We detected, by in-house EIA, BuV1-3 IgG antibodies in 7/228 children (3.1%) and 10/180 adults (5.6%), whereas TuV IgG was found in one child (0.4%). All children and 91% of the adults were Finnish, yet interestingly 3/6 adults of Indian origin were BuV-IgG positive...
December 14, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27936349/shedding-of-porcine-circovirus-type-1-dna-and-rotavirus-rna-by-infants-vaccinated-with-rotarix%C3%A2
#13
Slavica Mijatovic-Rustempasic, Lilly Cheng Immergluck, Trisha Chan Parker, Elham Laghaie, Anaam Mohammed, Terri McFadden, Umesh D Parashar, Michael D Bowen, Margaret M Cortese
Thirty-three infants aged ∼2 months had serial stool samples collected after receipt of Rotarix® vaccine dose 1, and assessed for shedding of porcine circovirus type 1 DNA and Rotavirus group A RNA by molecular methods. We did not find strong evidence that porcine circovirus type 1 replication occurred. Porcine circovirus type 1 genome with the same sequence as that in Rotarix® was detected in a few infants as late as day ≥13; while this timing could suggest there may have been replication and not just transient passage through the gastrointestinal tract, the lack of increase in copy numbers in any infant supports transient passage and there are inherent limitations to the results...
December 9, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27936028/cost-effectiveness-of-screening-colonoscopy-depends-on-adequate-bowel-preparation-rates-a-modeling-study
#14
James Kingsley, Siddharth Karanth, Frances Lee Revere, Deepak Agrawal
BACKGROUND: Inadequate bowel preparation during screening colonoscopy necessitates repeating colonoscopy. Studies suggest inadequate bowel preparation rates of 20-60%. This increases the cost of colonoscopy for our society. AIM: The aim of this study is to determine the impact of inadequate bowel preparation rate on the cost effectiveness of colonoscopy compared to other screening strategies for colorectal cancer (CRC). METHODS: A microsimulation model of CRC screening strategies for the general population at average risk for CRC...
2016: PloS One
https://www.readbyqxmd.com/read/27899155/comparative-sequence-analysis-of-cyclospora-cayetanensis-apicoplast-genomes-originating-from-diverse-geographical-regions
#15
Hediye Nese Cinar, Yvonne Qvarnstrom, Yuping Wei-Pridgeon, Wen Li, Fernanda S Nascimento, Michael J Arrowood, Helen R Murphy, AhYoung Jang, Eunje Kim, RaeYoung Kim, Alexandre da Silva, Gopal R Gopinath
BACKGROUND: Cyclospora cayetanensis is an emerging coccidian parasite that causes endemic and epidemic diarrheal disease called cyclosporiasis, and this infection is associated with consumption of contaminated produce or water in developed and developing regions. Food-borne outbreaks of cyclosporiasis have occurred almost every year in the USA since the 1990s. Investigations of these outbreaks are currently hampered due to lack of molecular epidemiological tools for trace back analysis...
November 29, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27895408/molecular-detection-of-helicobacter-pylori-antibiotic-resistance-in-stool-vs-biopsy-samples
#16
Denise E Brennan, Joseph Omorogbe, Mary Hussey, Donal Tighe, Grainne Holleran, Colm O'Morain, Sinéad M Smith, Deirdre McNamara
AIM: To compare (1) demographics in urea breath test (UBT) vs endoscopy patients; and (2) the molecular detection of antibiotic resistance in stool vs biopsy samples. METHODS: Six hundred and sixteen adult patients undergoing endoscopy or a UBT were prospectively recruited to the study. The GenoType HelicoDR assay was used to detect Helicobacter pylori (H. pylori) and antibiotic resistance using biopsy and/or stool samples from CLO-positive endoscopy patients and stool samples from UBT-positive patients...
November 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27894993/new-adenoviruses-from-new-primate-hosts-growing-diversity-reveals-taxonomic-weak-points
#17
Eva Dadáková, Tomáš Chrudimský, Kristýna Brožová, David Modrý, Vladimír Celer, Kristýna Hrazdilová
The knowledge of the closest human relatives of human adenoviruses (AdVs) such as adenoviruses found in nonhuman primates is still limited, despite the growing importance of adenoviruses in vaccine development, gene and cancer therapy. We examined 153 stool samples of 17 non-human primate species and detected adenoviral DNA sequences of DNA polymerase (DPOL) gene in 54 samples (35%), originating from 12 out of 17 primate species. We further sequenced 15 hexon gene fragments and based on the phylogenetic analysis we propose two new provisional species SAdV-H and SAdV-I...
November 25, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27891338/non-o157-h7-shiga-toxin-producing-diarrhoeagenic-escherichia-coli-stec-in-southern-india-a-tinderbox-for-starting-epidemic
#18
Shashank Purwar, Subrana Roy, Sharada Metgud
INTRODUCTION: Outbreaks due to non-O157:H7 Shiga toxin producing Escherichia coli (STEC) resulting in Haemolytic Uraemic Syndrome (HUS) have garnered much attention because of associated mortality transcending across continents and also because diarrhoea due to E.coli itself is rare in developed countries. The actual incidence of non-O157:H7 STEC in sporadic acute diarrhoea is not fully elucidated, both in developing as well as in developed countries. Due to larger extent of faecal-oral transmission in developing countries it is prudent to look for non-O157: H7 STEC in such epidemiological settings because of very high potential to spread across larger geographical regions and cause life threatening illness...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27888861/inflammatory-bowel-disease-in-digestive-disease-week-2016-advances-in-epidemiology-follow-up-treatment-monitoring-optimisation-and-individual-tailoring-and-colon-cancer-prevention
#19
Santiago García-López
In Digestive Disease Week 2016, interesting data were presented on the eventual role of certain foods in inflammatory bowel disease, although the value of these data is relative. Also of interest were epidemiological studies, of which several analysed the natural history of the disease. Some presentations dealt with the search for individual predictive factors, a pressing need in clinical practice. Unfortunately, some of the findings presented were of dubious value. A study suggesting that a simple parameter as increased blood monocytes could be a clear predictive factor of poor outcome could perhaps be highlighted (the results were striking but had multiple limitations)...
September 2016: Gastroenterología y Hepatología
https://www.readbyqxmd.com/read/27885465/multilocus-sequence-analysis-of-giardia-spp-isolated-from-patients-with-diarrhea-in-austria
#20
Mellesia F Lee, Herbert Auer, John F Lindo, Julia Walochnik
Giardia duodenalis is a protozoan parasite causing intestinal infections in a wide range of mammals. Two distinct assemblages, A and B, infect humans predominantly; however, both are believed to be generally zoonotic. Giardia strains associated with infections in Austria have not been investigated at the molecular level. In this study, 65 human stool samples microscopically positive for Giardia spp. were subjected to DNA isolation and nested PCR targeting fragments of the glutamate dehydrogenase (gdh), triose phosphate isomerase (tpi), and beta-gardin (bg) genes...
November 25, 2016: Parasitology Research
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