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Microbiology, bacteria, virus

Georgia-Paraskevi Nikoleli, Dimitrios P Nikolelis, Christina G Siontorou, Stephanos Karapetis, Theo Varzakas
The modern environmental and food analysis requires sensitive, accurate, and rapid methods. The growing field of biosensors represents an answer to this demand. Unfortunately, most biosensor systems have been tested only on distilled water or buffered solutions, although applications to real samples are increasingly appearing in recent years. In this context, biosensors for potential food applications continue to show advances in areas such as genetic modification of enzymes and microorganisms, improvement of recognition element immobilization, and sensor interfaces...
2018: Advances in Food and Nutrition Research
Vishal Salunkhe, Iris M De Cuyper, Petros Papadopoulos, Pieter F van der Meer, Brunette B Daal, María Villa-Fajardo, Dirk de Korte, Timo K van den Berg, Laura Gutiérrez
Platelet concentrates (PCs) represent a blood transfusion product with a major concern for safety as their storage temperature (20-24°C) allows bacterial growth, and their maximum storage time period (less than a week) precludes complete microbiological testing. Pathogen inactivation technologies (PITs) provide an additional layer of safety to the blood transfusion products from known and unknown pathogens such as bacteria, viruses, and parasites. In this context, PITs, such as Mirasol Pathogen Reduction Technology (PRT), have been developed and are implemented in many countries...
March 19, 2018: Platelets
David I Walker, Andrew Younger, Louise Stockley, Craig Baker-Austin
A wide variety of pathogenic agents such as bacteria, viruses and parasites can be greatly concentrated in filter feeding bivalve molluscan shellfish (BMS), that are grown in faecally contaminated waters. Human health risks associated with the consumption of BMS are also compounded by the traditional pattern of consuming them raw or lightly cooked. Because of these well-established food safety risks, food legislation such as that in Europe stipulates that BMS production areas are monitored for faecal contamination and classified accordingly...
August 2018: Food Microbiology
Valerio Matozzo, Carlo Ercolini, Laura Serracca, Roberta Battistini, Irene Rossini, Giulia Granato, Elisabetta Quaglieri, Alberto Perolo, Livio Finos, Giuseppe Arcangeli, Daniela Bertotto, Giuseppe Radaelli, Bruno Chollet, Isabelle Arzul, Francesco Quaglio
The Gulf of La Spezia (northern Tyrrhenian Sea, Italy) is a commercially important area both as a shipping port and for mussel farming. Recently, there has been increased concern over environmental disturbances caused by anthropogenic activities such as ship traffic and dredging and the effects they have on the health of farmed mussels. This paper reports the results of microbiological and histological analyses, as well as of measurement of several biomarkers which were performed to assess the health status of mussels (Mytilus galloprovincialis) from four rearing sites in the Gulf of La Spezia...
February 28, 2018: Journal of Invertebrate Pathology
Shahid Ullah Khan, Tawfik A Saleh, Abdul Wahab, Muhammad Hafeez Ullah Khan, Dilfaraz Khan, Wasim Ullah Khan, Abdur Rahim, Sajid Kamal, Farman Ullah Khan, Shah Fahad
Silver nanotechnology has received tremendous attention in recent years, owing to its wide range of applications in various fields and its intrinsic therapeutic properties. In this review, an attempt is made to critically evaluate the chemical, physical, and biological synthesis of silver nanoparticles (AgNPs) as well as their efficacy in the field of theranostics including microbiology and parasitology. Moreover, an outlook is also provided regarding the performance of AgNPs against different biological systems such as bacteria, fungi, viruses, and parasites (leishmanial and malarial parasites) in curing certain fatal human diseases, with a special focus on cancer...
2018: International Journal of Nanomedicine
Eduardo Corel, Raphaël Méheust, Andrew K Watson, James O McInerney, Philippe Lopez, Eric Bapteste
Extensive microbial gene flows affect how we understand virology, microbiology, medical sciences, genetic modification and evolutionary biology. Phylogenies only provide a narrow view of these gene flows: plasmids and viruses, lacking core genes, cannot be attached to cellular life on phylogenetic trees. Yet viruses and plasmids have a major impact on cellular evolution, affecting both the gene content and the dynamics of microbial communities. Using bipartite graphs that connect up to 149,000 clusters of homologous genes with 8217 related and unrelated genomes, we can in particular show patterns of gene sharing that do not map neatly with the organismal phylogeny...
January 15, 2018: Molecular Biology and Evolution
Yvan Bettarel, Sébastien Halary, Jean-Christophe Auguet, Thanh Chi Mai, Ngoc Van Bui, Thierry Bouvier, Patrice Got, Corinne Bouvier, Sonia Monteil-Bouchard, Desnues Christelle
The grazing activity by specific marine organisms represents a growing threat to the survival of many scleractinian species. For example, the recent proliferation of the corallivorous gastropod Drupella now constitutes a critical case in all South-East Asian waters. If the damaging effects caused by this marine snail on coral polyps are relatively well known, the indirect incidence of predation on coral microbial associates is still obscure and might also potentially impair coral health. In this study, we compared the main ecological traits of coral-associated bacterial and viral communities living in the mucus layer of Acropora formosa and Acropora millepora, of healthy and predated individuals (i...
January 16, 2018: ISME Journal
Ignacio Gutiérrez-Del-Río, Laura Marín, Javier Fernández, María Álvarez San Millán, Francisco Javier Ferrero, Marta Valledor, Juan Carlos Campo, Natalia Cobián, Ignacio Méndez, Felipe Lombó
Drinking water can be exposed to different biological contaminants from the source, through the pipelines, until reaching the final consumer or industry. Some of these are pathogenic bacteria and viruses which may cause important gastrointestinal or systemic diseases. The microbiological quality of drinking water relies mainly in monitoring three indicator bacteria of faecal origin, Escherichia coli, Enterococcus faecalis and Clostridium perfringens, which serve as early sentinels of potential health hazards for the population...
2018: PloS One
Hui Zhu, Fang Yuan, Zhaokang Yuan, Rong Liu, Fei Xie, Ling Huang, Xiaojun Liu, Xiaoqing Jiang, Jian Wang, Qunying Xu, Zhiqiang Shen, Donghan Liu, Ronghao Zhang, Yuanan Lu
BACKGROUND: Recreational water contaminated with fecal pollution poses a great public health concern, as fecal waste may cause serious waterborne illnesses. Current recreational water standards using fecal indicator bacteria (FIB) have their limitations for human protection especially in developing countries such as China. METHODS: To explore the potential use of enteric viruses as a potential indicator of fecal contamination, four viruses: norovirus geno-groups I and II, enteroviruses, and adenoviruses were tested in this study using molecular detection methods and sensitive RT-PC developed in the University of Hawaii...
January 5, 2018: Virology Journal
Claudio Passariello, Pierangelo Gigola, Luca Testarelli, Monica Puttini, Serena Schippa, Stefano Petti
Aims: The present study aimed to investigate microbial patterns associated with disease progression and coinfection by different Herpesviruses in generalized aggressive periodontitis (GAP). Methods: Microbiological samples were obtained from active (AS) and non-active (n-AS) sites in 165 subjects affected by GAP and were analyzed for 40 bacterial species by the Checkerboard DNA-DNA Hybridization technique and for Herpes simplex 1 (HSV-1), Human Cytomegalovirus (CMV), and Epstein Bar virus (EBV) by PCR...
April 2017: Annali di Stomatologia
M M Nikitin, N V Statsyuk, P A Frantsuzov, V G Dzhavakhiya, A G Golikov
AIM: Create a method for highly sensitive, selective, rapid, and easy-to-use detection and identification of economically significant potato pathogens, including viruses, bacteria and oomycetes, be it single pathogen, or a range of various pathogens occurring simultaneously. METHODS AND RESULTS: Test-systems for real-time PCR, operating in the unified amplification regime, have been developed for Phytophthora infestans, Pectobacterium atrosepticum, Dickeya dianthicola, Dickeya solani, Ralstonia solanacearum, Pectobacterium carotovorum, Clavibacter michiganensis subsp...
January 3, 2018: Journal of Applied Microbiology
Christine Hercik, Leonard Cosmas, Ondari D Mogeni, Newton Wamola, Wanze Kohi, Victor Omballa, Melvin Ochieng, Shirley Lidechi, Juma Bonventure, Caroline Ochieng, Clayton Onyango, Barry S Fields, Sayoki Mfinanga, Joel M Montgomery
INTRODUCTION: In low-resource settings, empiric case management of febrile illness is routine as a result of limited access to laboratory diagnostics. The use of comprehensive fever syndromic surveillance, with enhanced clinical microbiology, advanced diagnostics and more robust epidemiologic investigation, could enable healthcare providers to offer a differential diagnosis of fever syndrome and more appropriate care and treatment. METHODS: We conducted a year-long exploratory study of fever syndrome among patients ≥ 1 year if age, presenting to clinical settings with an axillary temperature of ≥37...
2017: PloS One
Paul Turner, Kuong Suy, Le Van Tan, Pora Sar, Thyl Miliya, Nguyen Thi Thu Hong, Vu Thi Ty Hang, Nguyen Thi Han Ny, Sona Soeng, Nicholas P J Day, H Rogier van Doorn, Claudia Turner
BACKGROUND: Central nervous system (CNS) infections are an important cause of childhood morbidity and mortality. The aetiologies of these potentially vaccine-preventable infections have not been well established in Cambodia. METHODS: We did a one year prospective study of children hospitalised with suspected CNS infection at Angkor Hospital for Children, Siem Reap. Cerebrospinal fluid specimens (CSF) samples underwent culture, multiplex PCR and serological analysis to identify a range of bacterial and viral pathogens...
December 29, 2017: BMC Infectious Diseases
C M C Rodrigues, H Groves
Community-acquired pneumonia (CAP) is the leading cause of mortality in children under five years of age, globally. To improve the management of CAP, we must distinguish CAP from other common paediatric conditions and develop better diagnostic methods to detect the causative organism, so to best direct appropriate resources in both industrialised and developing countries. Here, we review the diagnostic modalities available for identifying viruses and bacteria in the upper and lower respiratory tract of children, with a discussion of their utility and limitations in diagnosing CAP in children...
December 13, 2017: Journal of Clinical Microbiology
Kathryn J Boor, Martin Wiedmann, Sarah Murphy, Sam Alcaine
Microbes that may be present in milk can include pathogens, spoilage organisms, organisms that may be conditionally beneficial (e.g., lactic acid bacteria), and those that have not been linked to either beneficial or detrimental effects on product quality or human health. Although milk can contain a full range of organisms classified as microbes (i.e., bacteria, viruses, fungi, and protozoans), with few exceptions (e.g., phages that affect fermentations, fungal spoilage organisms, and, to a lesser extent, the protozoan pathogens Cryptosporidium and Giardia) dairy microbiology to date has focused predominantly on bacteria...
December 2017: Journal of Dairy Science
G Nazzaro, A Tourlaki, B Scoppio, A Restelli, A Grancini, L Brambilla
Kaposi 's sarcoma (KS) is a rare multifocal angioproliferative disease associated with human herpes virus 8 (HHV-8) infection, characterized by cutaneous nodules or plaques especially on the lower limbs. Some skin modifications, such as chronic lymphedema, plantar hyperkeratosis and interdigital desquamation, may be associated with consequent impairment of the local immunosurveillance and increased risk of some bacterial or mycotic infections. With the objective of evaluating if bacterial or mycotic infections in KS patients are supported by different microorganisms compared to control patients, we performed an observational retrospective study, comparing positive cultural swabs of interdigital intertrigo of KS patients with positive cultural swabs of interdigital intertrigo of patients admitted to our dermatologic unit during the last 10 years...
November 17, 2017: European Journal of Clinical Microbiology & Infectious Diseases
Daniele Lantagne, Justine Rayner, Anjuliee Mittelman, Kurt Pennell
We wish to thank Fewtrell, Majuru, and Hunter for their article highlighting genotoxic risks associated with the use of particulate silver for primary drinking water treatment. The recent promotion of colloidal silver products for household water treatment in developing countries is problematic due to previously identified concerns regarding manufacturing quality and questionable advertising practices, as well as the low efficiency of silver nanoparticles to treat bacteria, viruses, and protozoa in source waters...
November 13, 2017: Environmental Health: a Global Access Science Source
Fei-Fei Tang, Xiao-Su Zhao, Lan-Ping Xu, Xiao-Hui Zhang, Yu-Hong Chen, Xiao-Dong Mo, Kai-Yan Liu, Xiao-Jun Huang
OBJECTIVES: Pulmonary infiltrates in allogeneic hematopoietic stem cell transplant (allo-HSCT) patients are potentially life-threatening and require early diagnosis and treatment. We aimed to retrospectively explore the clinical efficacy of polymerase chain reaction (PCR) in conjunction with flexible bronchoscopy (FB) in allo-HSCT patients with pulmonary infiltrates. PATIENTS AND METHODS: We retrospectively reviewed all patients undergoing FB after allo-HSCT at the Peking University Institute of Hematology from January 2013 to December 2016...
January 2018: Clinical Transplantation
Doris Sobral Marques Souza, Ana Ferreira Ávila Dominot, Vanessa Moresco, Célia Regina Monte Barardi
Bivalve mollusks are filter feeders and may accumulate human pathogens in their tissues. Many studies demonstrated human diseases associated with bivalve consumption, especially oysters. Anomalocardia brasiliana clams are distributed along the Brazilian coastal area and are an exotic ingredient for some typical dishes in Brazil. Even though there are several reports describing the contamination of oysters and mussels with human pathogens, there is a lack of studies reporting contamination of A. brasiliana with human pathogens...
August 12, 2017: International Journal of Food Microbiology
Uri Obolski, Yoav Ram, Lilach Hadany
Adaptive landscapes represent a mapping between genotype and fitness. Rugged adaptive landscapes contain two or more adaptive peaks: allele combinations with higher fitness than any of their neighbors in the genetic space. How do populations evolve on such rugged landscapes? Evolutionary biologists have struggled with this question since it was first introduced in the 1930s by Sewall Wright. Discoveries in the fields of genetics and biochemistry inspired various mathematical models of adaptive landscapes. The development of landscape models led to numerous theoretical studies analyzing evolution on rugged landscapes under different biological conditions...
January 2018: Reports on Progress in Physics
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