Результаты поиска

Comparative evaluation of colorimetric microtiter plate systems for detection of herpes simplex virus in cerebrospinal fluid.

In the past few years, application of the PCR to the detection of herpes simplex virus (HSV) DNA in the cerebrospinal fluid (CSF) from patients with encephalitis and meningitis has become standard laboratory practice. However, from an operational perspective, the true diagnostic value of PCR in this setting is yet to be realized because most laboratories subject the amplification products to lengthy probe hybridization procedures by Southern blotting. As alternatives to Southern blotting, we evaluated colorimetric microtiter plate (MTP) systems from ViroMed Laboratories, Inc. (PrimeCapture), C…

Dual activities of lysis and capsule degradation enable the bacteriophage protein Lys33795 to effectively disrupt Streptococcus suis biofilms.

Streptococcus suis (S. suis) is an encapsulated zoonotic pathogen that can form recalcitrant biofilms. Bacteriophage-derived endolysins and depolymerases represent promising antibiofilm agents, but currently, no report has described protein which displays both of lytic and capsule degradation activities simultaneously. Here, we mined the porcine gut virome and identified Lys33795, a dual-activity antibacterial protein that degrades both capsule and peptidoglycan of S. suis. Lys33795 consists of an N-terminal GH25_muramidase domain and a C-terminal cell wall binding domain (CBD). However, trans…

Insights into diversity, host-range, and temporal stability of Bacteroides and Phocaeicola prophages.

BACKGROUND: Phages are critical components of the gut microbiome, influencing bacterial composition and function as predators, parasites, an … units (vOTUs). Notably, comparisons between prophages identified in isolated bacterial genomes, metaviromes, and large public gut virome databases revealed a broader host range than initially observed in single isolates. Certain prophages were consistent across time points and individuals, suggesting temporal stability. All identified prophages belonged …

A Systematic Review of the Pulmonary Microbiome in Patients with Acute Exacerbation COPD Requiring ICU Admission.

Background: Chronic obstructive pulmonary disease (COPD) is a major health concern. Acute exacerbations (AECOPD) may require intensive care … ween patients with and without isolated PPMs. However, the included studies did not investigate the virome of the patients, which may influence the microbiome and the outcome of infection. Therefore, further research is essential to comprehensively investigate the complete microbial and viral composition of the lower respiratory system in COPD patients a …

Proton Pump Inhibitor Use and Complications of Cirrhosis Are Linked With Distinct Gut Microbial Bacteriophage and Eukaryotic Viral-Like Particle Signatures in Cirrhosis.

INTRODUCTION: Proton pump inhibitors (PPIs) modulate the progression of cirrhosis to hepatic encephalopathy (HE) and can affect the bacterial microbiome. However, the impact of PPI on the virome in cirrhosis using viral-like particle (VLP) analysis is unclear. METHODS: We determined the VLP in the stool microbiome in patients with cirrhosis cross-sectionally (ascites, HE, and PPI use analyzed) who were followed up for 6-month hospitalizations and through 2 clinical trials of PPI withdrawal and initiation. RESULTS: In a cross-sectional study, PPI users had greater ascites prevalence and 6-mon…

High Monocyte Count Associated with Human Cytomegalovirus Replication In Vivo and Glucocorticoid Therapy May Be a Hallmark of Disease.

Cytomegalovirus (CMV) syndrome and infectious disease are defined as pathogen detection with appropriate clinical symptoms, but there are no … hallmark of CMV replication. In the COVID-19 era, presence of high virus level, especially part of virome (CMV) in the molecular technique, is not sufficient for the definition of either proven or probable CMV replication at any site. These preliminary observations merit additional studies to establish whether this clinical response is mediated by monoc …

The active lung microbiota landscape of COVID-19 patients through the metatranscriptome data analysis.

Introduction: With the outbreak of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2 … by the α-diversity, β-diversity, and species composition analysis based on bacterial microbiota and virome. Pathogens (e.g., Klebsiella oxytoca causing pneumonia as well), immunomodulatory probiotics (e.g., lactic acid bacteria and Faecalibacterium prausnitzii, a butyrate producer), and Tobacco mosaic virus (TMV) were enriched in the COVID-19 group, sugg …

EsViritu is a sensitive and specific profiler for viral pathogen detection and genome recovery in metagenomes.

Metagenomic sequencing allows for detection of any number of pathogenic viruses from a single sample without a priori knowledge of its conte … xonomic refinement with a curated Virus Pathogen Database to reconstruct virus genomes and generate virome profiles directly from reads. We benchmarked EsViritu against four leading metagenomic profilers ( Kraken2, Centrifuger, Metabuli , and Sylph ), running each program across a full parameter sweep and against the same Virus Pathogen Database for an a …

Co-detection and genomic characterization of avian rotavirus A, avian orthoreovirus, and chicken megrivirus-C using nontargeted metagenomic surveillance in Indian broiler chickens.

Nontargeted metagenomic surveillance of the poultry enteric virome reveals underrecognized threats to poultry health and productivity in intensive production systems. In South Asia, avian rotavirus A (AvRV-A) and avian orthoreovirus (ARV) are frequently detected in broilers by conventional diagnostics, whereas chicken megrivirus genotype C (ChMeV-C) is often identified through metagenomic surveillance. Often present in both clinical disease and coinfections, these viruses may impair gut function, immune responses, and growth performance, yet their genomic diversity and evolutionary dynamics in…

Discovery of a novel orthototivirus-like virus in patients with vulvovaginal candidiasis.

INTRODUCTION: Vulvovaginal candidiasis (VVC) is a common fungal infection affecting women worldwide. Although the vaginal microbiome has bee … osal environments. This discovery highlights previously unrecognized viral diversity in the vaginal virome and provides new insights into viruses associated with vulvovaginal candidiasis.

Multi-omic factors associated with future wheezing in infants.

BACKGROUND: The pathophysiology of wheezing is multifactorial, impacted by medical, demographic, environmental, and immunologic factors. We … ures. Saliva was collected for multi-omic assessment of cytokines, microRNAs, mRNAs, and microbiome/virome RNAs. RESULTS: Two infant factors (daycare attendance, family history of asthma) and three salivary "omic" features (miR-26a-5p, Elusimicrobia, Streptococcus phage phiARI0131-1) differed between the two groups (adjusted p < 0.05). miR-26a-5p levels …

The discovery, distribution, and diversity of DNA viruses associated with Drosophila melanogaster in Europe.

Drosophila melanogaster is an important model for antiviral immunity in arthropods, but very few DNA viruses have been described from the family Drosophilidae. This deficiency limits our opportunity to use natural host-pathogen combinations in experimental studies, and may bias our understanding of the Drosophila virome. Here, we report fourteen DNA viruses detected in a metagenomic analysis of 6668 pool-sequenced Drosophila, sampled from forty-seven European locations between 2014 and 2016. These include three new nudiviruses, a new and divergent entomopoxvirus, a virus related to Leptopilina…

Feline chaphamaparvovirus in cats with enteritis and upper respiratory tract disease.

Feline chaphamaparvovirus (FeChPV) is a novel parvovirus, first discovered in a multi-facility feline shelter in Canada in 2019, during an outbreak of acute gastro-enteritis (AGE) in cats, and detected at high prevalence (47.0%) in faecal samples. Whether this finding was anecdotal or similar viruses are common components of feline virome is still unclear. Also, the potential impact of this virus on feline health is uncertain. Herewith, a case-control study was performed to investigate whether this novel parvovirus may play a role as enteric pathogen, screening samples collected from cats with…

Viruses in Vietnamese Patients Presenting with Community-Acquired Sepsis of Unknown Cause.

Community-acquired (CA) sepsis is a major public health problem worldwide, yet the etiology remains unknown for >50% of the patients. Here we applied metagenomic next-generation sequencing (mNGS) to characterize the human virome in 492 clinical samples (384 sera, 92 pooled nasal and throat swabs, 10 stools, and 6 cerebrospinal fluid samples) from 386 patients (213 adults and 173 children) presenting with CA sepsis who were recruited from 6 hospitals across Vietnam between 2013 and 2015. Specific monoplex PCRs were used subsequently to confirm the presence of viral sequences detected by mNGS. W…

ENDEMIC INFECTION OF STRANDED SOUTHERN SEA OTTERS (ENHYDRA LUTRIS NEREIS) WITH NOVEL PARVOVIRUS, POLYOMAVIRUS, AND ADENOVIRUS.

Over the past century, the southern sea otter (SSO; Enhydra lutris nereis) population has been slowly recovering from near extinction due to … sues (spleen, retropharyngeal and mesenteric lymph node, lung, and liver). This study describes the virome in tissues of a threatened species and shows that stranded SSO are frequently infected with multiple viruses, warranting future research to investigate associations between these infections and observed lesions.

Antibody-mediated control of anellovirus infection: evidence from people who inject drugs.

Infections with viruses belonging to the family Anelloviridae are widespread among humans. Although generally considered a commensal, there … y.IMPORTANCEAnelloviruses are highly diverse and are recognized as the major component of the blood virome in healthy humans. Despite this, little is known about their interactions with their hosts. In this study, we found that anelloviruses can elicit antibody responses. Notably, antibodies that targeted a sequence variable region on spikes present on v …

Вирусы, связанные с плохим здоровьем у диких шимпанзе.

Вирусная инфекция является одной из основных причин плохого состояния здоровья у диких шимпанзе (Pan troldytes), однако большинство свидетельств на сегодняшний день являются результатом заметных вспышек заболеваний с высокой заболеваемостью и смертностью. Для изучения взаимосвязи между вирусной инфекцией и плохим здоровьем в периоды, не связанные с вспышками заболеваний, мы провели продольное исследование диких восточных шимпанзе (P.t. schweinfurthii) в общинах Каньявара и Нго в национальном парке Кибале, Уганда. Мы собирали стандартизованные данные наблюдения за 4 года, а затем использовали м

Совпадение в аннотации оригинала
Viral infection is a major cause of ill health in wild chimpanzees (Pan troglodytes), but most evidence to date has come from conspicuous di … , observational health data for 4 years and then used metagenomics to characterize gastrointestinal viromes (i.e., all viruses recovered from fecal samples) in individual chimpanzees before and during episodes of clinical disease. We restricted our analyses to viruses thought to infect mammals or primarily associated with mammals, discarding viruses asso …

Screen the unforeseen: Microbiome-profiling for detection of zoonotic pathogens in wild rats.

Wild rats can host various zoonotic pathogens. Detection of these pathogens is commonly performed using molecular techniques targeting one or a few specific pathogens. However, this specific way of surveillance could lead to (emerging) zoonotic pathogens staying unnoticed. This problem may be overcome by using broader microbiome-profiling techniques, which enable broad screening of a sample's bacterial or viral composition. In this study, we investigated if 16S rRNA gene amplicon sequencing would be a suitable tool for the detection of zoonotic bacteria in wild rats. Moreover, we used virome-e…

Mosquito-borne arboviruses in Uganda: history, transmission and burden.

Mosquito-transmitted arboviruses constitute a large proportion of emerging infectious diseases that are both a public health problem and a t … is technology, its use will undoubtedly be critically important in the characterization of mosquito viromes which in turn will inform other diagnostic efforts.

Parahenipavirus langyaense (Langya virus): Spillover ecology, noncanonical receptor-mediated entry, and future control strategies.

Langya virus (LayV), classified in the species Parahenipavirus langyaense, is a newly identified zoonotic paramyxovirus discovered in febrile patients in eastern China in recent years. The discovery of LayV has expanded the field beyond the prevailing paradigm of highly pathogenic, bat-borne henipaviruses represented by Nipah virus (NiV) and Hendra virus (HeV), toward a parahenipavirus spillover model shaped by shrews, rodents, and agricultural ecological interfaces. Reported cases have mainly presented with fever, fatigue, cough, and vomiting, and may be accompanied by leukopenia, thrombocyto