AI Article Synopsis
Article Abstract
Here we report the first direct counts of soil bacteriophage and show that substantial populations of these viruses exist in soil (grand mean = 1.5 x 10(7) g(-1)), at least 350-fold more than the highest numbers estimated from traditional viable plaque counts. Adding pure cultures of a Serratia phage to soil showed that the direct counting methods with electron microscopy developed here underestimated the added phage populations by at least eightfold. So, assuming natural phages were similarly underestimated, virus numbers in soil averaged 1.5 x 10(8) g(-1), which is equivalent to 4% of the total population of bacteria. This high abundance was to some extent confirmed by hybridizing colonies grown on Serratia and Pseudomonas selective media with cocktails of phage infecting these bacteria. This showed that 8.9 and 3.9%, respectively, hybridized with colonies from the two media and confirmed the presence of phage DNA sequences in the cultivable fraction of the natural population. Thus, soil phage, like their aquatic counterparts, are likely to be important in controlling bacterial populations and mediating gene transfer in soil.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC152412 | PMC |
| http://dx.doi.org/10.1128/AEM.69.1.285-289.2003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exploring the epidemiological burden of RSV pre- and post-COVID-19 pandemic: A Jordanian tertiary hospital experience.
J Int Med Res
December 2024
Department of Pediatrics, Jordan University Hospital, Amman, Jordan.
Objectives: To describe changes in respiratory syncytial virus (RSV) epidemiology, its associated clinical outcomes and predictors of severe acute lower respiratory tract infection (ALRTI) pre- and post-COVID-19.
Methods: In this retrospective cohort, we analysed data from electronic medical record of children <5 years who were hospitalized at Jordan University Hospital with RSV-associated ALRTI from 2018 to 2022.
Results: 325 inpatients with respiratory infections were included.
Visible-Light-Absorbing Photosensitizer Nanostructures for Treatment of Pathogenic Bacteria and Induction of Systemic Acquired Resistance.
ACS Nano
December 2024
School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
Induction of systemic acquired resistance (SAR) in plants to control bacterial diseases has become an effective solution to the problems of agrochemical resistance and ecological environment damage caused by long-term and large-scale use of traditional bactericides. However, current SAR-inducing compounds are often unable to rapidly eliminate pathogenic bacteria in infected plant tissues to prevent further spread of the disease, severely restraining the potential for extensive application in agriculture. Herein, we address the limitations by developing a series of visible-light-absorbing aggregation-induced emission photosensitizers suitable for agricultural use.
View Article and Find Full Text PDFAddition of macrolide antibiotics for hospital treatment of community-acquired pneumonia.
J Infect Dis
December 2024
The National Institute for Health Research Oxford Biomedical Research Centre, University of Oxford, Oxford, UK.
Background: Current guidelines recommend combining a macrolide with a β-lactam antibiotic for the empirical treatment of moderate-to-high severity community-acquired pneumonia (CAP); however macrolide use is associated with potential adverse events and antimicrobial resistance.
Methods: We analysed electronic health data from 8,872 adults in Oxfordshire, UK, hospitalised with CAP between 01-January-2016 and 19-March-2024, who received either amoxicillin or co-amoxiclav as initial treatment. We examined the effects of adjunctive macrolides on 30-day all-cause mortality, time to hospital discharge, and changes in Sequential Organ Failure Assessment (SOFA) score, using inverse probability treatment weighting to address confounding by baseline severity.
Honey from Different Species of Stingless Bees (Apidae: Meliponini) is Effective Against Gram-Positive and Gram-Negative Bacteria.
J Med Food
December 2024
Escola de Artes, Ciências e Humanidades, University of São Paulo (EACH-USP), São Paulo, Brazil.
Stingless bee honey is a natural product consisting of sugars, organic acids, proteins, minerals, vitamins, phenolic compounds, and flavonoids. Due to its healing properties, honey is often used in phytotherapy and for homemade syrups. The search for natural therapeutic alternatives has been an increasing trend in recent years, mainly due to the side effects of artificial drugs and increasing antibiotic resistance.
View Article and Find Full Text PDFTranscriptomics in Human Septic Shock: State of the Art.
Surg Infect (Larchmt)
December 2024
Laboratório de Emergências Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.
Septic shock is a complex syndrome characterized by signs of intense systemic inflammation and a profound dysregulation of the immune response. Large-scale gene expression analysis is a valuable tool in this scenario because sepsis affects various cellular components and signaling pathways. In this article, we provide an overview of the transcriptomic studies that investigated human sepsis from 2007 to 2024, highlighting their major contributions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!