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https://www.readbyqxmd.com/read/28627855/multiplex-pcr-gastro-intestinal-panels-for-the-management-of-traveller-s-diarrhea-are-they-accurate-and-useful
#1
Laurence Rochat, Antony Croxatto, Serge De Vallière, Valérie D'Acremont, Blaise Genton
Until recently, the search for enteropathogens causing travellers' diarrhea was based on stool culture (Campylobacter spp., Salmonella spp. and Shigella spp.), direct microscopy with (Cryptosporidium spp.) or without specific staining (Giardia lamblia, Entamoeba histolytica) or specific antigen detection (Giardia lamblia, Entamoeba histolytica). Molecular analyses are progressively replacing traditional diagnostic methods but their clinical usefulness remains to be better defined. This article attempts to describe the advantages and disadvantages of these new molecular methods and to illustrate situations where they could be useful using clinical cases frequently encountered in the practice of travel medicine...
May 3, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28615884/intestinal-parasitic-infestation-among-paediatric-diarrhoea-patients-attending-hospitals-in-port-blair-andaman-and-nicobar-islands
#2
Ramanathan Thamizhmani, Attayur Purushottaman Sugunan, P Ramya Raghvan, Paluru Vijayachari
Acute childhood diarrhoea remains one of the leading causes of childhood morbidity and mortality in developing countries. The present study was conducted to estimate the prevalence of various intestinal parasitic infestation among children aged 5 years and less suffering from acute diarrhoea disease attending hospitals in Andaman Islands. During the period from January 2012 to December 2013, a total of 675 acute diarrhoea patients were included in the study. Among these samples, 476 (70.5, 95 % CI 66.9, 73...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28605118/histone-methyltransferase-1-regulates-the-encystation-process-in-the-parasite-giardia-lamblia
#3
Agostina Salusso, Natacha Zlocowski, Gonzalo Mayol, Nahuel Zamponi, Andrea S Rópolo
In eukaryotes, histone lysine methylation is associated with either active or repressed chromatin states, depending on the status of methylation. Even when the amino-terminus of Giardia lamblia histones diverges from other organisms, these regions contain lysine residues that are potential targets for methylation. When we examined the role of the histone methyltransferase 1 (HMT1) in the regulation of the encystation process by GlHMT1 overexpression or downregulation, we observed an increase or a decrease of cyst production respectively, compared to wild-type trophozoites...
June 12, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28572634/analysis-of-parasitic-protozoa-at-the-single-cell-level-using-microfluidic-impedance-cytometry
#4
J S McGrath, C Honrado, D Spencer, B Horton, H L Bridle, H Morgan
At present, there are few technologies which enable the detection, identification and viability analysis of protozoan pathogens including Cryptosporidium and/or Giardia at the single (oo)cyst level. We report the use of Microfluidic Impedance Cytometry (MIC) to characterise the AC electrical (impedance) properties of single parasites and demonstrate rapid discrimination based on viability and species. Specifically, MIC was used to identify live and inactive C. parvum oocysts with over 90% certainty, whilst also detecting damaged and/or excysted oocysts...
June 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28562805/high-prevalence-of-enteroparasites-in-children-from-ribeir%C3%A3-o-preto-s%C3%A3-o-paulo-brazil
#5
Renata Elizabete Pagotti da Fonseca, Michelle Christiane Rodrigues Barbosa, Beatriz Rossetti Ferreira
Objective: To determine the prevalence of intestinal parasites and possible associated factors. Method: Cross-sectional epidemiological study of 962 children (3-12-years) from an area within the scope of a basic health unit in Ribeirão Preto, São Paulo, Brazil. Data were collected by home interviews and three-sample stool analysis and evaluated with the chi-square and Fisher's exact tests (p<0.05). Results: The prevalence of intestinal parasites was significantly high (57...
May 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28552268/characterization-of-bip-protein-of-g-lamblia-as-a-potential-immunogen-in-a-mouse-infection-model
#6
Gloria Lopez-Romero, Thania Garzon, Raul Rascon, Alejandra Valdez, Jael Quintero, Aldo A Arvizu-Flores, Adriana Garibay-Escobar, Lucila Rascon, Humberto Astiazarán-García, Carlos Velazquez
Giardia lamblia is a protozoan parasite that causes one of the most common gastrointestinal diseases worldwide. To eliminate the parasite from the host intestine, it is necessary the activation of B-cell and T-cell dependent mechanisms. The knowledge about Giardia antigens that can stimulate the host immune response is limited. Recently, it has been described the Binding Immunoglobulin Protein (BIP) of G. lamblia (71kDa) as a potential immunogen. Additionally, our group has identified a highly immunogenic antigen (5G8 protein) of G...
August 2017: Immunobiology
https://www.readbyqxmd.com/read/28539736/antiprotozoal-activities-of-tiliroside-and-other-compounds-from-sphaeralcea-angustifolia-cav-g-don
#7
Fernando Calzada, Jose Correa Basurto, Elizabeth Barbosa, Claudia Velázquez, Normand García Hernández, R M Ordoñez Razo, David Mendez Luna, Lilian Yepez Mulia
BACKGROUND: Sphaeralcea angustifolia (Malvaceae) is extensively used in Mexican traditional medicine for the treatment of gastrointestinal disorders such as diarrhea and dysentery. OBJECTIVE: The current study was to validate the traditional use of S. angustifolia for the treatment of diarrhea and dysentery on biological grounds using in vitro antiprotozoal activity and computational experiments. MATERIALS AND METHODS: The ethanol extract, subsequent fractions, flavonoids, phenolic acids, and a sterol were evaluated on Entamoeba histolytica and Giardia lamblia trophozoites...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28539715/antiprotozoal-antibacterial-and-antidiarrheal-properties-from-the-flowers-of-chiranthodendron-pentadactylon-and-isolated-flavonoids
#8
Fernando Calzada, Teresa Juárez, Normand García-Hernández, Miguel Valdes, Oscar Ávila, Lilian Yepez Mulia, Claudia Velázquez
BACKGROUND: Chiranthodendron pentadactylon Larreat. (Sterculiaceae) is a Mexican plant used in traditional medicine for the treatment of heart disease symptoms and infectious diarrhea. OBJECTIVE: To evaluate in vitro antiprotozoal and antibacterial activities and in vivo antidiarrheal activity from the flowers of C. pentadactylon using the extract, fractions, and major isolated flavonoids. MATERIALS AND METHODS: Bioassay-guided fractionation of the methanol extract of C...
April 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28506307/intestinal-parasitic-infections-and-its-association-with-undernutrition-and-cd4-t-cell-levels-among-hiv-aids-patients-on-haart-in-butajira-ethiopia
#9
Dereje Gedle, Gemechu Kumera, Tewodros Eshete, Kasahun Ketema, Haweni Adugna, Fetuma Feyera
BACKGROUND: Intestinal parasitic infections and HIV/AIDS have been the major public health problems and remain a vital cause of morbidity and mortality in developing countries. Both problems are linked in a vicious cycle. The magnitude of intestinal parasites was prevalent among people living with HIV/AIDS even in the HAART era. However, the pertinent risk factors associated with intestinal parasites among HIV/AIDS patients were not well investigated in Ethiopia particularly at Butajira town...
May 15, 2017: Journal of Health, Population, and Nutrition
https://www.readbyqxmd.com/read/28465123/curcumin-alters-the-cytoskeleton-and-microtubule-organization-on-trophozoites-of-giardia-lamblia
#10
Filiberto Gutiérrez-Gutiérrez, Lissethe Palomo-Ligas, José Manuel Hernández-Hernández, Armando Pérez-Rangel, Rodrigo Aguayo-Ortiz, Alicia Hernández-Campos, Rafael Castillo, Sirenia González-Pozos, Rafael Cortés-Zárate, Mario Alberto Ramírez-Herrera, María Luisa Mendoza-Magaña, Araceli Castillo-Romero
Giardia lamblia is a worldwide protozoan responsible for a significant number of intestinal infections. There are several drugs for the treatment of giardiasis, but they often cause side effects. Curcumin, a component of turmeric, has antigiardial activity; however, the molecular target and mechanism of antiproliferative activity are not clear. The effects of curcumin on cellular microtubules have been widely investigated. Since tubulin is the most abundant protein in the cytoskeleton of Giardia, to elucidate whether curcumin has activity against the microtubules of this parasite, we treated trophozoites with curcumin and the cells were analyzed by scanning electron microscopy and confocal microscopy...
April 30, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28456597/associations-of-giardia-lamblia-assemblages-with-hiv-infections-and-symptomatology-hiv-virus-and-assemblage-b-were-they-born-to-each-other
#11
Clarissa Perez Faria, Graziela Maria Zanini, Gisele Silva Dias, Maria do Céu Sousa
Giardia lamblia is an intestinal parasite that has an extensive genetic variation among isolates. This species is divided into eight different assemblages (A-H), but only assemblages A and B have been associated with human infections. Studies on the associations of G. lamblia assemblages and symptoms have been done but were inconclusive. The aim of this study was to correlate G. lamblia assemblages with symptoms in patients with and without HIV/AIDS and its association with the CD4T cell count. The cross-sectional survey was conducted among patients attending the Evandro Chagas National Institute of Infectious Diseases (INI/FIOCRUZ) in Rio de Janeiro from January 2011 to February 2015...
April 27, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28456494/phosphoinositide-binding-profiles-of-the-px-domains-of-giardia-lamblia
#12
Ananya Jana, Abhishek Sinha, Srimonti Sarkar
The membrane trafficking machinery that functions at the endomembrane system of Giardia lamblia appears to be significantly different from that present in most model eukaryotes. This machinery is important for encystation as cyst wall material is trafficked to the cell surface via encystation-specific vesicles. Since proteins containing the phosphoinositide-binding PX domains are known regulators of vesicular trafficking, BLAST search was used to identify the PX domains of G. lamblia. Six putative PX domain-containing ORFs were identified...
April 26, 2017: Parasitology International
https://www.readbyqxmd.com/read/28446068/multiplex-pcr-detection-of-cryptosporidium-sp-giardia-lamblia-and-entamoeba-histolytica-directly-from-dried-stool-samples-from-guinea-bissauan-children-with-diarrhoea
#13
Sointu Mero, Juha Kirveskari, Jenni Antikainen, Johan Ursing, Lars Rombo, Poul-Erik Kofoed, Anu Kantele
BACKGROUND: In developing countries, diarrhoea is the most common cause of death for children under five years of age, with Giardia lamblia, Cryptosporidium and Entamoeba histolytica as the most frequent pathogenic parasites. Traditional microscopy for stool parasites has poor sensitivity and specificity, while new molecular methods may provide more accurate diagnostics. In poor regions with sample storage hampered by uncertain electricity supply, research would benefit from a method capable of analysing dried stools...
April 27, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28396548/click-chemistry-facilitated-structural-diversification-of-nitrothiazoles-nitrofurans-and-nitropyrroles-enhances-antimicrobial-activity-against-giardia-lamblia
#14
Wan Jung Kim, Keith A Korthals, Suhua Li, Christine Le, Jarosław Kalisiak, K Barry Sharpless, Valery V Fokin, Yukiko Miyamoto, Lars Eckmann
Giardia lamblia is an important and ubiquitous cause of diarrheal disease. The primary agents in the treatment of giardiasis are nitroheterocyclic drugs, particularly the imidazoles metronidazole and tinidazole and the thiazole nitazoxanide. Although these drugs are generally effective, treatment failures occur in up to 20% of cases, and resistance has been demonstrated in vivo and in vitro Prior work had suggested that side chain modifications of the imidazole core can lead to new effective 5-nitroimidazole drugs that can combat nitro drug resistance, but the full potential of nitroheterocycles other than imidazole to yield effective new antigiardial agents has not been explored...
June 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28396324/giardia-alters-commensal-microbial-diversity-throughout-the-murine-gut
#15
N R Barash, J G Maloney, S M Singer, S C Dawson
Giardia lamblia is the most frequently identified protozoan cause of intestinal infection. Over 200 million people are estimated to have acute or chronic giardiasis, with infection rates approaching 90% in areas where Giardia is endemic. Despite its significance in global health, the mechanisms of pathogenesis associated with giardiasis remain unclear, as the parasite neither produces a known toxin nor induces a robust inflammatory response. Giardia colonization and proliferation in the small intestine of the host may, however, disrupt the ecological homeostasis of gastrointestinal commensal microbes and contribute to diarrheal disease associated with giardiasis...
June 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28366172/the-effects-of-phosphanegold-i-thiolates-on-the-biological-properties-of-acanthamoeba-castellanii-belonging-to-the-t4-genotype
#16
Ruqaiyyah Siddiqui, Farhat Abjani, Chien Ing Yeo, Edward R T Tiekink, Naveed Ahmed Khan
BACKGROUND: Gold compounds have shown promise in the treatment of non-communicable diseases such as rheumatoid arthritis and cancer, and are considered of value as anti-microbial agents against Gram-negative and Gram-positive bacteria, and have anti-parasitic properties against Schistosoma mansoni, Trypanosoma brucei, Plasmodium falciparum, Leishmania infantinum, Giardia lamblia, and Entamoeba histolytica. They are known to affect enzymatic activities that are required for the cellular respiration processes...
April 3, 2017: Journal of Negative Results in Biomedicine
https://www.readbyqxmd.com/read/28364239/use-of-translation-blocking-morpholinos-for-gene-knockdown-in-giardia-lamblia
#17
Jana Krtková, Alexander R Paredez
Giardia lamblia, a major parasite, is an emerging model organism due to its compact genomic arrangement and composition. The most popular reverse genetic technique, RNAi, is ineffective in Giardia. In contrast, protein depletion by translation blocking morpholinos is suitable for most gene targets and provides up to 80% depletion of the target protein. The method is fast, reliable, and specific. After antisense morpholino oligomer delivery into Giardia trophozoites by electroporation, the cells can be used for many subsequent analyses 8-48 h after treatment...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28362138/intestinal-parasitic-infections-in-different-groups-of-immunocompromised-patients-in-kashan-and-qom-cities-central-iran
#18
Sima Rasti, Malihe Hassanzadeh, Hossein Hooshyar, Mansooreh Momen-Heravi, Seyed Gholam Abbas Mousavi, Amir Abdoli
INTRODUCTION: Intestinal parasitic infections (IPIs) are important causes of morbidity and mortality in patients with immunocompromising conditions. OBJECTIVE: The aim of this study was to determine the prevalence of IPIs in different groups of immunocompromised patients, including hemodialysis patients (HD), renal transplant recipients (RTR), cancer and HIV/AIDS patients in comparison with healthy individuals in two central cities of Iran (Kashan and Qom). METHODS: In this case-control study, the stool samples of 135 HD, 50 RTR, 60 cancer patients, 20 HIV/AIDS patients and 120 healthy subjects were tested using direct-smear, formol-ether concentration, Ziehl-Neelsen staining and Agar plate method...
June 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28348938/giardia-filled-pancreatic-mass-in-a-patient-with-recently-treated-t-cell-rich-b-cell-lymphoma
#19
Raj Shah, Talal Asif, Richard Johnson
Giardia lamblia (G. lamblia)-filled pancreatic masses are a rarely reported entity. Furthermore, there are only a few case reports in literature on the association of these masses with cancer. We present a case of a G. lamblia-filled pancreatic cystic mass in a patient with a history of T-cell-rich B-cell lymphoma. The authors performed a PubMed search using (Medical Subject Headings) MeSH terms of pancreas, mass, Giardia, and lymphoma.  A 53-year-old male with past medical and surgical history of T-cell-rich B-cell lymphoma, status post R-CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone plus rituximab) therapy with positron emission tomography (PET) scan showing no residual disease, essential hypertension, and alcohol use disorder presented to the emergency department (ED) with epigastric pain and nausea for one week...
February 9, 2017: Curēus
https://www.readbyqxmd.com/read/28347294/from-good-health-to-illness-with-post-infectious-fatigue-syndrome-a-qualitative-study-of-adults-experiences-of-the-illness-trajectory
#20
Eva Stormorken, Leonard A Jason, Marit Kirkevold
BACKGROUND: Municipal drinking water contaminated with the parasite Giardia lamblia in Bergen, Norway, in 2004 caused an outbreak of gastrointestinal infection in 2500 people, according to the Norwegian Prescription Database. In the aftermath a minor group subsequently developed post-infectious fatigue syndrome (PIFS). Persons in this minor group had laboratory-confirmed parasites in their stool samples, and their enteritis had been cured by one or more courses of antibiotic treatment...
March 27, 2017: BMC Family Practice
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