journal
https://read.qxmd.com/read/38930614/presence-and-persistence-of-eskapee-bacteria-before-and-after-hospital-wastewater-treatment
#21
JOURNAL ARTICLE
Miguel Galarde-López, Maria Elena Velazquez-Meza, Elizabeth Ernestina Godoy-Lozano, Berta Alicia Carrillo-Quiroz, Patricia Cornejo-Juárez, Alejandro Sassoé-González, Alfredo Ponce-de-León, Pedro Saturno-Hernández, Celia Mercedes Alpuche-Aranda
The metagenomic surveillance of antimicrobial resistance in wastewater has been suggested as a methodological tool to characterize the distribution, status, and trends of antibiotic-resistant bacteria. In this study, a cross-sectional collection of samples of hospital-associated raw and treated wastewater were obtained from February to March 2020. Shotgun metagenomic sequencing and bioinformatic analysis were performed to characterize bacterial abundance and antimicrobial resistance gene analysis. The main bacterial phyla found in all the samples were as follows: Proteobacteria , Bacteroides , Firmicutes , and Actinobacteria ...
June 19, 2024: Microorganisms
https://read.qxmd.com/read/38930613/the-enigma-of-nth2-gene-in-yeasts
#22
JOURNAL ARTICLE
Sergi Maicas, Ruth Sánchez-Fresneda, Francisco Solano, Juan-Carlos Argüelles
The enzymatic hydrolysis of the non-reducing disaccharide trehalose in yeasts is carried out by trehalase, a highly specific α-glucosidase. Two types of such trehalase activity are present in yeasts, and are referred to as neutral and acid enzymes. They are encoded by distinct genes ( NTH1 and ATH1 , respectively) and exhibit strong differences in their biochemical and physiological properties as well as different subcellular location and regulatory mechanisms. Whereas a single gene ATH1 codes for acid trehalase, the genome of some yeasts appears to predict the existence of a second redundant neutral trehalase, encoded by the NTH2 gene, a paralog of NTH1 ...
June 19, 2024: Microorganisms
https://read.qxmd.com/read/38930612/nisin-inhibition-of-gram-negative-bacteria
#23
JOURNAL ARTICLE
Adam M Charest, Ethan Reed, Samantha Bozorgzadeh, Lorenzo Hernandez, Natalie V Getsey, Liam Smith, Anastasia Galperina, Hadley E Beauregard, Hailey A Charest, Mathew Mitchell, Margaret A Riley
Aims: This study investigates the activity of the broad-spectrum bacteriocin nisin against a large panel of Gram-negative bacterial isolates, including relevant plant, animal, and human pathogens. The aim is to generate supportive evidence towards the use/inclusion of bacteriocin-based therapeutics and open avenues for their continued development. Methods and Results: Nisin inhibitory activity was screened against a panel of 575 strains of Gram-negative bacteria, encompassing 17 genera. Nisin inhibition was observed in 309 out of 575 strains, challenging the prevailing belief that nisin lacks effectiveness against Gram-negative bacteria...
June 19, 2024: Microorganisms
https://read.qxmd.com/read/38930611/spatial-chromosome-organization-and-adaptation-of-escherichia-coli-under-heat-stress
#24
JOURNAL ARTICLE
Xu-Ting Wang, Bin-Guang Ma
The spatial organization of bacterial chromosomes is crucial for cellular functions. It remains unclear how bacterial chromosomes adapt to high-temperature stress. This study delves into the 3D genome architecture and transcriptomic responses of Escherichia coli under heat-stress conditions to unravel the intricate interplay between the chromosome structure and environmental cues. By examining the role of macrodomains, chromosome interaction domains (CIDs), and nucleoid-associated proteins (NAPs), this work unveils the dynamic changes in chromosome conformation and gene expression patterns induced by high-temperature stress...
June 19, 2024: Microorganisms
https://read.qxmd.com/read/38930610/a-genomics-based-discovery-of-secondary-metabolite-biosynthetic-gene-clusters-in-the-potential-novel-strain-streptomyces-sp-21so2-11-isolated-from-antarctic-soil
#25
JOURNAL ARTICLE
Yu Du, Wei Han, Puyu Hao, Yongqiang Hu, Ting Hu, Yinxin Zeng
Streptomyces species are attractive sources of secondary metabolites that serve as major sources of antibiotics and other drugs. In this study, genome mining was used to determine the biosynthetic potential of Streptomyces sp. 21So2-11 isolated from Antarctic soil. 16S rRNA gene sequencing revealed that this strain is most closely related to Streptomyces drozdowiczii NBRC 101007T , with a similarity of 98.02%. Genome comparisons based on average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) showed that strain 21So2-11 represents a novel species of the genus Streptomyces ...
June 19, 2024: Microorganisms
https://read.qxmd.com/read/38930609/the-description-and-analysis-of-the-complete-genome-of-dermacoccus-barathri-fbcc-b549-strain
#26
JOURNAL ARTICLE
Yeha Kim, Hyaekang Kim, Jina Kim, Ji-Hye Han, Eu Jin Chung, Seung Won Nam, Miyoung Shin, Woori Kwak
Dermacoccus barathri is the first reported pathogen within the Dermacoccus genus to cause a catheter-related bloodstream infection, which occurred in 2015. In this study, the complete genome assembly of Dermacoccus barathri was constructed, and the complete genome of Dermacoccus barathri FBCC-B549 consists of a single chromosome (3,137,745 bp) without plasmids. The constructed genome of D. barathri was compared with those of two closely related species within the Dermacoccus genus. D. barathri exhibited a pattern similar to Dermacoccus abyssi in terms of gene clusters and synteny analysis...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930608/periodontal-inflammation-and-dysbiosis-relate-to-microbial-changes-in-the-gut
#27
JOURNAL ARTICLE
Angela R Kamer, Smruti Pushalkar, Babak Hamidi, Malvin N Janal, Vera Tang, Kumar Raghava Chowdary Annam, Leena Palomo, Deepthi Gulivindala, Lidia Glodzik, Deepak Saxena
Periodontal disease (PerioD) is a chronic inflammatory disease of dysbiotic etiology. Animal models and few human data showed a relationship between oral bacteria and gut dysbiosis. However, the effect of periodontal inflammation and subgingival dysbiosis on the gut is unknown. We hypothesized that periodontal inflammation and its associated subgingival dysbiosis contribute to gut dysbiosis even in subjects free of known gut disorders. We evaluated and compared elderly subjects with Low and High periodontal inflammation (assessed by Periodontal Inflamed Surface Area (PISA)) for stool and subgingival derived bacteria (assayed by 16S rRNA sequencing)...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930607/the-utilization-of-bacillus-subtilis-to-design-environmentally-friendly-living-paints-with-anti-mold-properties
#28
JOURNAL ARTICLE
Yuval Dorfan, Avichay Nahami, Yael Morris, Benny Shohat, Ilana Kolodkin-Gal
The anti-fungal properties of the probiotic bacterium Bacillus subtilis have been studied extensively in agriculture and ecology, but their applications in the built environment remain to be determined. Our work aims to utilize this biological component to introduce new diverse anti-mold properties into paint. "Mold" refers to the ubiquitous fungal species that generate visible multicellular filaments commonly found in household dust. The development of mold leads to severe health problems for occupants, including allergic response, hypersensitivity pneumonitis, and asthma, which have significant economic and clinical outcomes...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930606/impact-of-covid-19-restrictions-on-incidence-of-enteropathogenic-bacteria-virus-and-parasites-in-denmark-a-national-register-based-study
#29
JOURNAL ARTICLE
Kumanan Rune Nanthan, Eva Plantener, John Coia, Jørgen Engberg, Leif Percival Andersen, Ea Marmolin, Gitte Nyvang Hartmeyer, Hans Linde Nielsen, Christen Rune Stensvold, Anne Line Engsbro, Bente Olesen, Lars Lemming, Ming Chen
Diarrheal diseases caused by enteric pathogens are a significant public health concern. It is widely considered that close contact between persons, poor hygiene, and consumption of contaminated food are the primary causes of gastroenteritis. Clinical microbiology laboratory observations indicate that the incidence of enteropathogenic microorganisms may have been reduced in Denmark during the COVID-19 pandemic. All Departments of Clinical Microbiology in Denmark provided data on the monthly incidence of Salmonella spp...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930605/development-of-multiplex-rt-qpcr-assays-for-simultaneous-detection-and-quantification-of-faecal-indicator-bacteria-in-bathing-recreational-waters
#30
JOURNAL ARTICLE
Marina Carrasco-Acosta, Pilar Garcia-Jimenez
In this study, we designed and validated in silico and experimentally a rapid, sensitive, and specific multiplex RT qPCR for the detection and quantification of faecal indicator bacteria (FIB) used as microbiological references in marine bathing water regulations ( Escherichia coli and intestinal enterococci). The 16S rRNA gene was used to quantify group-specific enterococci and Escherichia/Shigella and species-specific such as Enterococcus faecalis and E. faecium . Additionally, a ybbW gene encoding allantoin transporter protein was used to detect E...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930604/bioconversion-of-furanic-compounds-by-chlorella-vulgaris-unveiling-biotechnological-potentials
#31
JOURNAL ARTICLE
Ricarda Kriechbaum, Oliver Spadiut, Julian Kopp
Lignocellulosic biomass is abundant on Earth, and there are multiple acidic pretreatment options to separate the cellulose, hemicellulose, and lignin fraction. By doing so, the fermentation inhibitors 5-Hydroxymethylfurfural (HMF) and furfural (FF) are produced in varying concentrations depending on the hydrolyzed substrate. In this study, the impact of these furanic compounds on Chlorella vulgaris growth and photosynthetic activity was analyzed. Both compounds led to a prolonged lag phase in Chlorella vulgaris growth...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930603/role-of-malq-enzyme-in-a-reconstructed-maltose-maltodextrin-pathway-in-actinoplanes-sp-se50-110
#32
JOURNAL ARTICLE
Camilla März, Sophia Nölting, Lars Wollenschläger, Alfred Pühler, Jörn Kalinowski
The pseudotetrasaccharide acarbose, produced by Actinoplanes sp. SE50/110, is a relevant secondary metabolite used in diabetes type II medication. Although maltose plays a crucial role in acarbose biosynthesis, the understanding of the maltose/maltodextrin metabolism and its involvement in acarbose production is at an early stage. Here, we reconstructed the predicted maltose-maltodextrin pathway that involves four enzymes AmlE, MalZ, MalP, and MalQ. An investigation of enzyme activities was conducted through in vitro assays, leading to an expansion of previously postulated substrate spectra...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930602/macrogenomics-based-analysis-of-the-effects-of-intercropped-soybean-photosynthetic-characteristics-and-nitrogen-assimilating-enzyme-activities-on-yield-at-different-nitrogen-levels
#33
JOURNAL ARTICLE
Liqiang Zhang, Yudi Feng, Zehang Zhao, Bate Baoyin, Zhengguo Cui, Hongyu Wang, Qiuzhu Li, Jinhu Cui
Currently, China's soybean self-sufficiency rate is only 15%, highlighting the soybean crisis and the supply chain risks that pose a major threat to China's food security. Thus, it has become imperative to step up efforts to boost soybean production capacity while promoting the green and sustainable development of regional farmland ecosystems. In this context, the present study comprehensively investigated the effects of intercropping and nitrogen application rate on soybean yield, as well as the changes in gradients generated by different levels of nitrogen application...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930601/ciliated-epibionts-modify-the-cardiac-stress-reaction-to-perceived-predation-in-daphnia
#34
JOURNAL ARTICLE
Andrew K Davis, Helen Gloege
When animals perceive an acute stressor like a predator, they typically undergo a suite of physiological changes that function to improve survival during the encounter, such as elevation in cardiac output, to supply more energy to muscles. If bodily energy is limited, such as by parasites or infections, these functions could become less efficient and lessen host survival. In the aquatic world of microorganisms, individuals can become colonized by other organisms on their surface (epibionts), which could sap energy from their host from their weight, or even compete with the host for food...
June 18, 2024: Microorganisms
https://read.qxmd.com/read/38930600/effects-of-weak-electric-fields-on-the-denitrification-performance-of-pseudomonas-stutzeri-insights-into-enzymes-and-metabolic-pathways
#35
JOURNAL ARTICLE
Xuyan Zhu, Feng Lin, Ji Sun, Xin Li, Guangcan Zhu, Yongze Lu, Liwei Sun, Hongyang Wang
Enhanced denitrification has been reported under weak electric fields. However, it is difficult to investigate the mechanism of enhanced denitrification due to the complex interspecific interactions of mixed-culture systems. In this study, Pseudomonas stutzeri , capable of denitrification under anaerobic conditions, was selected for treating low COD/N (2.0, ratio between concentration of chemical oxygen demand and NO3 - -N) artificial wastewater under constant external voltages of 0.2, 0.4, and 0.6 V. The results revealed that P...
June 17, 2024: Microorganisms
https://read.qxmd.com/read/38930599/-symbiodiniaceae-and-ruegeria-sp-co-cultivation-to-enhance-nutrient-exchanges-in-coral-holobiont
#36
JOURNAL ARTICLE
Yawen Liu, Huan Wu, Yang Shu, Yanying Hua, Pengcheng Fu
The symbiotic relationship between corals and their associated microorganisms is crucial for the health of coral reef eco-environmental systems. Recently, there has been a growing interest in unraveling how the manipulation of symbiont nutrient cycling affects the stress tolerance in the holobiont of coral reefs. However, most studies have primarily focused on coral- Symbiodiniaceae -bacterial interactions as a whole, neglecting the interactions between Symbiodiniaceae and bacteria, which remain largely unexplored...
June 17, 2024: Microorganisms
https://read.qxmd.com/read/38930598/tuberculosis-in-a-migrant-population-integrated-management-of-a-case-through-the-prevention-department-and-hospital-services
#37
JOURNAL ARTICLE
Nahuel Fiorito, Daniela Piacentini, Serena Cian, Anna Voltolini, Jacopo Fagherazzi, Erica Bino, Marika Brancher, Giorgia De Luca, Marica Battistin, Mattia Manzi, Vincenzo Marcotrigiano, Angela Vedana, Christian Napoli, Sandro Cinquetti
Among numerous public health actions, the Prevention Departments of Local Health Authorities take charge of the migrant asylum-seeking population for health assessments, for the implementation of preventive activities, and for any consequent actions. This report describes two cases of tuberculosis in Belluno Province managed by a multidisciplinary team made up of healthcare workers that involved numerous diagnostic, clinical, and prophylactic implications, as well as an analysis of the epidemiological aspects related to the incidence of cases along the migration route...
June 17, 2024: Microorganisms
https://read.qxmd.com/read/38930597/microbial-assessment-in-a-rare-norwegian-book-collection-a-one-health-approach-to-cultural-heritage
#38
JOURNAL ARTICLE
Sílvia O Sequeira, Ekaterina Pasnak, Carla Viegas, Bianca Gomes, Marta Dias, Renata Cervantes, Pedro Pena, Magdalena Twarużek, Robert Kosicki, Susana Viegas, Liliana Aranha Caetano, Maria João Penetra, Inês Silva, Ana Teresa Caldeira, Catarina Pinheiro
Microbial contamination poses a threat to both the preservation of library and archival collections and the health of staff and users. This study investigated the microbial communities and potential health risks associated with the UNESCO-classified Norwegian Sea Trade Archive (NST Archive) collection exhibiting visible microbial colonization and staff health concerns. Dust samples from book surfaces and the storage environment were analysed using culturing methods, qPCR, Next Generation Sequencing, and mycotoxin, cytotoxicity, and azole resistance assays...
June 17, 2024: Microorganisms
https://read.qxmd.com/read/38930596/assessing-pcr-positive-acanthamoeba-keratitis-a-retrospective-chart-review
#39
JOURNAL ARTICLE
Frank Blaser, Anahita Bajka, Felix Grimm, Simone Metzler, Didier Herrmann, Daniel Barthelmes, Sandrine Anne Zweifel, Sadiq Said
Ophthalmologists' diagnostic and treatment competence in Acanthamoeba keratitis varies widely. This investigator-initiated, retrospective, single-center chart review examined the electronic patient files regarding PCR-positive Acanthamoeba keratitis. We included corneal and contact lens assessments. We further reviewed the patient's medical history, corneal scraping results regarding viral or fungal co-infections, and the duration from symptom onset to final diagnosis. We identified 59 eyes of 52 patients from February 2010 to February 2023, with 31 of 52 (59...
June 17, 2024: Microorganisms
https://read.qxmd.com/read/38930595/fibroscan-%C3%A2-versus-biochemical-scores-a-study-of-liver-fibrosis-in-hiv-with-hbv-co-infection
#40
JOURNAL ARTICLE
Giorgiana Nicoleta Lungu, Gheorghe Iulian Diaconescu, Florentina Dumitrescu, Anca Oana Docea, Radu Mitrut, Lucian Giubelan, Ovidiu Zlatian, Paul Mitrut
The study aimed to determine liver fibrosis in human immunodeficiency virus (HIV) positive individuals using transient elastography (FibroScan® ), Fibrosis-4 (FIB-4) score, and aspartate aminotransferase (AST) to Platelet Ratio Index (APRI) in the HIV Department from Infectious Diseases Hospital "Victor Babeș" Craiova, Romania. Of the analyzed HIV-positive subjects ( n = 161), 93 (57.76%) had HIV mono-infection, and 68 (42.24%) had Hepatitis B Virus (HBV) co-infection. The prevalence of advanced liver fibrosis was higher (F2: 11...
June 16, 2024: Microorganisms
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