Activity of Aztreonam-avibactam and other β-lactamase inhibitor combinations against Gram-negative bacteria isolated from patients hospitalized with pneumonia in United States medical centers (2020-2022).

Background: Initial antimicrobial therapy for pneumonia is frequently empirical and resistance to antimicrobial agents represents a great challenge to the treatment of patients hospitalized with pneumonia. We evaluated the frequency and antimicrobial susceptibility of Gram-negative bacteria causing pneumonia in US hospitals.

Methods: Bacterial isolates were consecutively collected (1/patient) from patients hospitalized with pneumonia and the susceptibility of Gram-negative bacilli (3,911 Enterobacterales and 2,753 non-fermenters) was evaluated by broth microdilution in a monitoring laboratory.

Private and well drinking water are reservoirs for antimicrobial resistant bacteria.

Water quality testing does not recognise antimicrobial resistance (AMR) and is often limited to indicators of faecal contamination Escherichia coli and Enterococcus species. In Europe, data on AMR in drinking water is scarce. In Ireland, as in many countries, household drinking water is supplied via mains or via private wells or water schemes.

Efficacy of molecularly diversified phosphorus-solubilizing rhizobacterial isolates in phytostimulation, antimicrobial attributes and phosphorus-transporter genes mediated plant growth performance in maize (Zea mays L.).

This study evaluated a dual management approach to enhance plant-growth by improving soil fertility, reducing pathogenic stress using PGPR that affect phosphorus-transporter (pht) genes. Among 213 maize rhizobacterial isolates, 40 demonstrated the ability to solubilize tri-calcium phosphate, potassium, zinc, and silicon, showing various PGP traits. Nine of these isolates exhibited significant antagonistic activity against the plant pathogens Colletotrichum chlorophyti and Xanthomonas axonopodis.

Synthesis and Biological Evaluation of Bile Acid-Triclosan Conjugates: A Study on Antibacterial, Antibiofilm, and Molecular Docking.

This work describes the synthesis, characterization, and antibacterial properties of four bile acid-triclosan conjugates. The in vitro antibacterial activity of synthetic bile acid-triclosan conjugates was investigated against a panel of Gram-positive and Gram-negative bacteria. Conjugates and show high activity against (ATCC25922), with IC values of 2.

Update of the list of qualified presumption of safety (QPS) recommended microbiological agents intentionally added to food or feed as notified to EFSA 21: Suitability of taxonomic units notified to EFSA until September 2024.

The qualified presumption of safety (QPS) process was developed to provide a safety assessment approach for microorganisms intended for use in food or feed chains. In the period covered by this Statement, no new information was found that would change the status of previously recommended QPS taxonomic units (TUs). The TUs in the QPS list were updated based on a verification, against their respective authoritative databases, of the correctness of the names and completeness of synonyms.

Bacterial community profiling and identification of bacteria with lignin-degrading potential in different gut segments of African palm weevil larvae ().

The microbiota within the guts of insects plays beneficial roles for their hosts, such as facilitating digestion and extracting energy from their diet. The African palm weevil (APW) lives within and feeds on the high lignin-containing trunk of palm trees; therefore, their guts could harbour a large community of lignin-degrading microbes. In this study, we aimed to explore the bacterial community within the gut of the APW larvae, specifically with respect to the potential for lignin degradation in various gut segments as a first step to determining the viability of mining bacterial lignin-degrading enzymes for the bioconversion of lignocellulosic biomass to biofuels and biomaterials.

Green synthesis of Ag-Fe bimetallic nanoparticles using fungal filtrates: unlocking multifunctional medical and environmental applications.

The current investigation focuses on synthesizing Ag-Fe bimetallic nanoparticles (AgFe-BMNPs) using cell-free filtrates of the as a novel fungal reducing agent. The optical, morphological, and surface properties of these fungus-fabricated AgFe-BMNPs and their monometallic counterparts (AgNPs and FeNPs) were analyzed using sophisticated nanotechnology instruments. The UV-visible spectrum showed peaks at 231 nm and 415 nm for BMNPs and 450 nm and 386 nm for AgNPs and FeNPs, respectively.

Fungi on the cuticle surface increase the resistance of Aedes albopictus to deltamethrin.

Aedes albopictus (Ae. albopictus) is widely distributed and can transmit many infectious diseases, and insecticide-based interventions play an important role in vector control. However, increased insecticide resistance has become a severe public health problem, and the clarification of its detailed mechanism is a matter of urgence.

Mechanisms of bla dissemination across diverse carbapenem-resistant clinical isolates.

Objective: The IMP-4 carbapenemase is an endemic cause of carbapenem resistance in the Asia-Pacific region. Our aim was to determine the dissemination mechanism of the bla gene.

Methods: Twelve representative Australian IMP-4 clinical isolates from The Alfred Hospital (Victoria, Australia) were characterised using antimicrobial susceptibility testing, with their genome and plasmid assemblies analysed.

Recurrent relapsing remitting Serratia marcescens infective endocarditis in a former drug-using patient.

Unusual course of Serratia marcescens (SM) infectious endocarditis (IE) and literature review (2016-2024; 26 cases). A 44-year-old man, with chronic venous ulcers, presented 21/2 years after a MSSA tricuspid valve IE, a tricuspid and aortic valves SM IE . After 6 weeks of antibiotherapy (meropenem i.

Evaluation of multidrug resistance in the Gram-negative microbiome of cancer patients and the adverse effects of their metabolites on albino rats and epithelial or fibroblasts cell lines.

Background: Cancer is a significant global health issue due to its high incidence and mortality rates. In recent years, the relationship between the human microbiota and cancer has garnered attention across various medical fields. This includes research into the microbial communities that influence cancer development, tumor-associated microorganisms, and the interactions between the microbiome and tumor, collectively referred to as the oncobiome.

Imported seafood is a reservoir of Enterobacteriaceae carrying CTX-M-encoding genes of high clinical relevance.

We determined the frequency, genotypes, phenotypes, and mobility of extended-spectrum β-lactamase (ESBL)-encoding genes in Enterobacteriaceae isolated from retail seafood products. Overall, 288 samples of fresh shrimps, catfish and seabass imported from Asia were collected from three supermarket chains in the UK (96 each). After enrichment in MacConkey broth supplemented with cefotaxime, total DNA was screened for the presence of CTX-M, SHV and TEM by real-time PCR.

Screening and isolation of polyethylene microplastic degrading bacteria from mangrove sediments in southern China.

Mangrove sediments in southern China are a large reservoir for microplastics (MPs). In particular, polyethylene microplastics (PE-MPs) are environmentally toxic and have accumulated in large quantities in these sediments, posing a potential threat to the overall mangrove and the organisms that inhabit it. We screened sediments from 5 mangrove sites and identified a potential source of PE-MP degrading bacteria.

Epidemiology of ophthalmia neonatorum: a systematic review and meta-analysis.

Purpose: To elucidate the global epidemiology of Ophthalmia Neonatorum (ON), as well as its causative organisms and their antibiotic susceptibility patterns.

Methods: A systematic review of studies reporting the epidemiology of ON was performed using four electronic databases: PubMed, Scopus, Web of Science, and Medline. Data were extracted and study-specific estimates were combined using meta-analysis to obtain pooled proportions.

An uncommon cause of osteomyelitis: Serratia fonticola A rare pathogen in human infections.

Osteomyelitis is a prevalent orthopedic condition. The most frequently associated pathogens are , coagulase-negative Staphylococci, and aerobic gram-negative bacilli. The treatment includes the administration of antibiotics targeting the pathogens and possible surgical debridement.

Chronic bacterial infections exert metabolic costs in Drosophila melanogaster.

Bacterial infections can substantially impact host metabolic health as a result of the direct and indirect demands of sustaining an immune response and of nutrient piracy by the pathogen itself. Drosophila melanogaster and other insects that survive a sublethal bacterial infection often carry substantial pathogen burdens for the remainder of life. In this study, we asked whether these chronic infections exact metabolic costs for the host, and how these costs scale with the severity of chronic infection.

Isolation and characterization of the midgut microbiota of Aedes albopictus to identify suitable candidates for paratransgenesis.

Aedes albopictus is a widely recognized carrier of various pathogens. Its resilient characteristics enable it to easily spread across diverse climates. The microbiota in the midgut of mosquitoes plays a crucial role in the interactions between the host and pathogens and can either enhance or reduce the ability of the insect to transmit diseases.

Serratia Infections in Burn Care.

Serratia marcescens is an opportunistic nosocomial pathogen with significant implications for burn care due to its multidrug resistance, virulence, and ability to colonize hospital environments. This retrospective study, conducted at an American Burn Association Verified Burn Centre, reviewed 22 cases of S. marcescens infections from 2015 to 2020.

The interaction of bacteria and harmonine in harlequin ladybird confers an interspecies competitive edge.

The harlequin ladybird, , is a predatory beetle used globally to control pests such as aphids and scale insects. Originating from East Asia, this species has become highly invasive since its introduction in the late 19th century to Europe and North America, posing a threat to local biodiversity. Intraguild predation is hypothesized to drive the success of this invasive species, but the underlying mechanisms remain unknown.

Glycine betaine enhances heavy metal phytoremediation via rhizosphere modulation and nitrogen metabolism in king grass-Serratia marcescens strain S27 symbiosis.

Microbe-Assisted Phytoremediation (MAP) is an eco-friendly method for remediating soil contaminated with heavy metals such as cadmium (Cd) and chromium (Cr). This study demonstrates the potential of a king grass-Serratia marcescens strain S27 (KS) co-symbiotic system to enhance heavy metal remediation. The KS symbiosis increased the biomass of king grass by 48 % and enhanced the accumulation of Cd and Cr in the whole plant by 2.

Metronidazole-Associated Peripheral Neuropathy in a Patient With End-Stage Renal Failure.

Metronidazole is a broad-spectrum antimicrobial that is associated with 0.16% 100-day incidence rates for peripheral neuropathy. In this report, we present an interesting and rare presentation of peripheral neuropathy secondary to metronidazole use for bacteremia and sepsis in a patient with end-stage renal failure.

Enterobactin inhibits microbiota-dependent activation of AhR to promote bacterial sepsis in mice.

Sepsis is a major cause of morbidity and mortality, but our understanding of the mechanisms underlying survival or susceptibility is limited. Here, as pathogens often subvert host defence mechanisms, we hypothesized that this might influence the outcome of sepsis. We used microbiota analysis, faecal microbiota transplantation, antibiotic treatment and caecal metabolite analysis to show that gut-microbiota-derived tryptophan metabolites including indoles increased host survival in a mouse model of Serratia marcescens sepsis.

Comprehensive In Vitro Evaluation of Antibacterial, Antioxidant, and Computational Insights into (L.) B. L. Burtt from Hail Mountains, Saudi Arabia.

The arid mountainous region of Hail in Saudi Arabia has a variety of desert vegetation, some of which are conventionally used in Bedouin traditional medicine. These plants need scientific examination. This research seeks to examine using a thorough multi-analytical methodology that includes antibacterial and antioxidant assessments as well as computational modeling.

Exploring Novel Fungal-Bacterial Consortia for Enhanced Petroleum Hydrocarbon Degradation.

Bioremediation, involving the strategic use of microorganisms, has proven to be a cost-effective alternative for restoring areas impacted by persistent contaminants such as polycyclic aromatic hydrocarbons (PAHs). In this context, the aim of this study was to explore hydrocarbon-degrading microbial consortia by prospecting native species from soils contaminated with blends of diesel and biodiesel (20% biodiesel/80% diesel). After enrichment in a minimal medium containing diesel oil as the sole carbon source and based on 16S rRNA, Calmodulin and β-tubulin gene sequencing, seven fungi and 12 bacteria were identified.

in Sewage Sludge and Digestate Intended for Soil Fertilization.

Substances of organic origin are seeing increasing use in agriculture as rich sources of nutrients for plants. The aim of this study was to determine the microbiological contamination of sewage sludge and digestate to assess their safe use as fertilizers in Poland. The assessment of microbial soil, sewage sludge and digestate contamination was based on the total number of mesophilic bacteria and Gram-negative bacteria from the family.