BMC Microbiology最新文献

{"title":"Fluoroquinolone-specific resistance trajectories in E. coli and their dependence on the SOS-response.","authors":"Lisa Teichmann, Sam Luitwieler, Johan Bengtsson-Palme, Benno Ter Kuile","doi":"10.1186/s12866-025-03771-5","DOIUrl":"https://doi.org/10.1186/s12866-025-03771-5","url":null,"abstract":"<p><strong>Background: </strong>Fluoroquinolones are indispensable antibiotics used in treating bacterial infections in both human and veterinary medicine. However, resistance to these drugs presents a growing challenge. The SOS response, a DNA repair pathway activated by DNA damage, is known to influence resistance development, yet its role in fluoroquinolone resistance is not fully understood. This study aims to unfold the mechanisms of fluoroquinolone resistance by investigating the impact of the SOS response on bacterial adaptation.</p><p><strong>Results: </strong>We exposed Escherichia coli to four fluoroquinolones-ciprofloxacin, enrofloxacin, levofloxacin, and moxifloxacin. Using a recA knockout mutant, deficient in the SOS response, as a control, we assessed how the presence or absence of this pathway affects resistance development. Our findings demonstrated that the rate of resistance evolution varied between the different fluoroquinolones. Ciprofloxacin, enrofloxacin, and moxifloxacin exposures led to the most evident reliance on the SOS response for resistance, whereas levofloxacin exposed cultures showed less dependency. Whole genome analysis indicated distinct genetic changes associated with each fluoroquinolone, highlighting potential different pathways and mechanisms involved in resistance.</p><p><strong>Conclusions: </strong>This study shows that the SOS response plays a crucial role in resistance development to certain fluoroquinolones, with varying dependencies per drug. The characteristic impact of fluoroquinolones on resistance mechanisms emphasizes the need to consider the unique properties of each antibiotic in resistance studies and treatment strategies. These findings are essential for improving antibiotic stewardship and developing more effective, tailored interventions to combat resistance.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"37"},"PeriodicalIF":4.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel ready-to-use loop-mediated isothermal amplification (LAMP) method for detection of Burkholderia mallei and B. pseudomallei.","authors":"Mitsuru Nakase, Jeewan Thapa, Vanaabaatar Batbaatar, Ochirbat Khurtsbaatar, Batchuluun Enkhtuul, Jugderkhorloo Unenbat, Baasansuren Lkham, Sachiho Fujita, Ai Koshikawa, Apichai Tuanyok, Vannarat Saechan, Hideaki Higashi, Kyoko Hayashida, Yasuhiko Suzuki, Chie Nakajima, Takashi Kimura","doi":"10.1186/s12866-024-03737-z","DOIUrl":"https://doi.org/10.1186/s12866-024-03737-z","url":null,"abstract":"<p><strong>Background: </strong>Glanders and melioidosis are contagious zoonotic diseases caused by Burkholderia mallei and B. pseudomallei, respectively. Bacterial isolation and polymerase chain reaction (PCR) have been used to detect these bacteria in animals suspected of infection; however, both methods require skilled experimental techniques and expensive equipment. These obstacles make it difficult to diagnose B. mallei and B. pseudomallei infections in areas where reagents and equipment are difficult to procure. To solve this problem, we developed an easy and ready-to-use dried-format diagnostic tool based on loop-mediated isothermal amplification (LAMP) method.</p><p><strong>Results: </strong>The primer set targeting the internal transcribed spacer (ITS) region detected 10 genomic copies of B. mallei DNA and B. pseudomallei DNA using the conventional liquid LAMP method. This primer set did not detect any other Burkholderia species. Using this novel primer set, a dried-format in-house LAMP method with high sensitivity and specificity was developed. This method was used to test for the presence of B. mallei DNA in swabs collected from the nasal cavity and ulcerated skin of 19 B. mallei-infected horses and five uninfected horses and was compared with the real-time PCR method. These two tests showed 87.5% agreement for the positive samples and 100% agreement for the negative samples. This method detected all tested B. pseudomallei clinical isolates.</p><p><strong>Conclusions: </strong>We established the first dry LAMP method for the detection of B. mallei and B. pseudomallei. This study provided a simple, rapid, cost-effective, and sensitive diagnostic tool for glanders and melioidosis.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"36"},"PeriodicalIF":4.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibacterial activity of selenium nanoparticles/copper oxide (SeNPs/CuO) nanocomposite against some multi-drug resistant clinical pathogens.","authors":"Ahmed Morad Asaad, Sara A Saied, Mohammad M Torayah, N I Abu-Elsaad, Samah Mohammed Awad","doi":"10.1186/s12866-025-03743-9","DOIUrl":"https://doi.org/10.1186/s12866-025-03743-9","url":null,"abstract":"<p><strong>Background: </strong>Recent advances in nanomedicine have derived novel prospects for development of various bioactive nanoparticles and nanocomposites with significant antibacterial and antifungal properties. This study aims to investigate some characteristics of the novel Se-NPs/Cu₂O nanocomposite such as morphological, physicochemical, and optical properties, as well as to assess the antibacterial activity of this fabricated composite in different concentrations against some MDR Gram-positive and Gram-negative clinical bacterial isolates.</p><p><strong>Methods: </strong>The Se-NPs/Cu₂O nanocomposite was fabricated using the chemical deposition method. The fabricated nanocomposite was fully characterized by X-Ray diffraction analysis (XRD), fourier transforms infrared spectroscopy (FTIR), and transmission electron microscope (TEM). The antimicrobial activity of Se-NPs/Cu₂O was investigated using the standard broth microdilution method. The fabricated Se-NPs/Cu₂O nanocomposites were detected as stable and highly crystallized nanospheres with an average size of 98.6 nm.</p><p><strong>Results: </strong>The Se-NPs/Cu₂O nanocomposite showed a potent antimicrobial activity with MIC values ranged from 6.25 to 12.5 µg/ml for Gram-positive isolates, and 25 to 50 µg/ml for gram-negative isolates. The bactericidal activity was higher for gram-negative isolates with MBC/MIC ratios of 1-2 µg/ml for gram-negative, versus 8 µg/ml for gram positive pathogens.</p><p><strong>Conclusion: </strong>These findings would support further research in development of a novel Se-NPs/Cu₂O nanocomposite as a promising alternative therapeutic option for improving the quality of patients' management.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"33"},"PeriodicalIF":4.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fecal occult blood affects intestinal microbial community structure in colorectal cancer.","authors":"Wu Guodong, Wu Yinhang, Wu Xinyue, Shen Hong, Chu Jian, Qu Zhanbo, Han Shuwen","doi":"10.1186/s12866-024-03721-7","DOIUrl":"https://doi.org/10.1186/s12866-024-03721-7","url":null,"abstract":"<p><strong>Background: </strong>Gut microbes have been used to predict CRC risk. Fecal occult blood test (FOBT) has been recommended for population screening of CRC.</p><p><strong>Objective: </strong>To analyze the effects of fecal occult blood test (FOBT) on gut microbes.</p><p><strong>Methods: </strong>Fecal samples from 107 healthy individuals (FOBT-negative) and 111 CRC patients (39 FOBT-negative and 72 FOBT-positive) were included for 16 S ribosomal RNA sequencing. Based on the results of different FOBT, the community structure and diversity of intestinal bacteria in healthy individuals and CRC patients were analyzed. Characteristic gut bacteria were screened, and various machine learning algorithms were applied to construct CRC risk prediction models.</p><p><strong>Results: </strong>The gut microbiota of healthy people and CRC patients with different fecal occult blood were mapped. There was no statistical difference in diversity between CRC patients with negative FOBT and positive FOBT. Bacteroides, Blautia and Escherichia-Shigella were more correlated to healthy individuals, while Streptococcus showed higher correlation with CRC patients with negative FOBT. The accuracy of CRC risk prediction model based on the support vector machines (SVM) algorithm was the highest (89.71%). Subsequently, FOBT was included as a characteristic element in the model construction, and the prediction accuracy of the model was all increased. Similarly, the CRC risk prediction model based on SVM algorithm had the highest accuracy (92%).</p><p><strong>Conclusion: </strong>FOB affects the community composition of gut microbes. When predicting CRC risk based on gut microbiome, considering the influence of FOBT is expected to improve the accuracy of CRC risk prediction.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"34"},"PeriodicalIF":4.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of different wet distillers' grains ratios on fermentation quality, nitrogen fractions and bacterial communities of total mixed ration silage.","authors":"Ermei Du, Ning Mao, Shihao Liu, Hanyu Zhang, Meiling Fan, Hong Sun, Yulong Zheng, Qiming Cheng, Chunmei Wang, Ping Li, Yixiao Xie","doi":"10.1186/s12866-025-03750-w","DOIUrl":"https://doi.org/10.1186/s12866-025-03750-w","url":null,"abstract":"<p><strong>Objective: </strong>Wet distiller's grains (WDG) are rich in crude protein, yet challenging to preserve. Nevertheless, incorporating WDG into total mixed ration (TMR) silage holds promise for enhancing fermentation quality. This study investigated the effects of varying WDG proportions on nitrogen composition, fermentation quality, and microorganisms in TMR silage.</p><p><strong>Methods: </strong>Three TMR formulations were prepared: (1) 0% WDG (T0), (2) 15% WDG (T15), and (3) 30% WDG (T30) were ensiled for 7, 15, 30 and 60 days.</p><p><strong>Results: </strong>After 7 days of ensiling, butyric acid was detected in T0 and T15 groups, while T30 exhibited significantly lower levels (p < 0.05). Both T15 and T30 treatments led to improved V-scores of TMR silage. Non-protein nitrogen (NPN) production was slower in T30, with significant increases observed in NPN levels for T0 and T15 after 30 days (p < 0.05). However, the abundance of Clostridium was extremely low in the present study. Protein degradation and and butyric acid production may be attributed to Weissella.</p><p><strong>Conclusion: </strong>The fermentation quality of TMR silage is always decreasing during storage, so its storage time should be minimized. Incorporating 30% WDG reduced abundance of Weissella, resulting in less protein degradation and better fermentation quality in TMR silage.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"31"},"PeriodicalIF":4.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized extraction and kinetic study of cholesterol oxidase from a newly isolated Escherichia fergusonii strain from local whey samples: insights through a combined experimental study and artificial neural network modeling.","authors":"Simin Khataee, Gholamreza Dehghan, Samaneh Rashtbari, Arezu Marefat, Sina Jamei, Hamed Farzi-Khajeh","doi":"10.1186/s12866-024-03728-0","DOIUrl":"https://doi.org/10.1186/s12866-024-03728-0","url":null,"abstract":"<p><strong>Background: </strong>Microbial cholesterol oxidase (ChoX) has wide clinical and industrial applications; therefore, many efforts are being made to identify promising sources. This study aimed to isolate a novel ChoX-producing bacterial strain from whey samples.</p><p><strong>Results: </strong>The most efficient strain was selected based on extracellular ChoX-producing ability and characterized as Escherichia fergusonii (E. fergusonii) through molecular and biochemical analysis. The maximum production of ChoX was obtained at the optimum condition of 48 h of incubation under shaking conditions (130 rpm) at 35 °C in a basal medium adjusted to pH 6.5, including 1.4 g/L cholesterol as a sole carbon. The crude product was purified by ammonium sulfate precipitation and followed by ion exchange chromatography utilizing Q-Sepharose, resulting in 5.35-fold and 13.86-fold purification, respectively, with a final specific activity of 15.8 U/mg. Additionally, molecular weight was determined by SDS-PAGE to be 49.0 kDa. The optimum conditions required for the higher cholesterol decomposition ability of purified ChoX were suggested to be 30 °C and pH 7.5 in the presence of MgSo₄ with a K_m value of 0.71 mM. However, other case studies of metal ions showed an unfavorable effect on enzymatic performance. The enzyme retained almost 72.0% of its initial activity after 80 days of storage at 4 °C. Furthermore, the ChoX enzyme revealed acceptable stability at a pH value of 6.5 to 8.5, maintaining its initial activity of more than 50.0%. Finally, an artificial neural network (ANN) was designed to predict the most effective factor in the fermentation process for enzyme production and the purified ChoX activity.</p><p><strong>Conclusions: </strong>Considering the properties of the extracted enzyme from E. fergusonii, it would be regarded as a potential ChoX source for commercial applications.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"32"},"PeriodicalIF":4.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoding the chicken gastrointestinal microbiome.","authors":"P B Burrows, F Godoy-Santos, K Lawther, A Richmond, N Corcionivoschi, S A Huws","doi":"10.1186/s12866-024-03690-x","DOIUrl":"https://doi.org/10.1186/s12866-024-03690-x","url":null,"abstract":"<p><p>Metataxonomic studies have underpinned a vast understanding of microbial communities residing within livestock gastrointestinal tracts, albeit studies have often not been combined to provide a global census. Consequently, in this study we characterised the overall and common 'core' chicken microbiota associated with the gastrointestinal tract (GIT), whilst assessing the effects of GIT site, bird breed, age and geographical location on the GIT resident microbes using metataxonomic data compiled from studies completed across the world. Specifically, bacterial 16S ribosomal DNA sequences from GIT samples associated with various breeds, differing in age, GIT sites (caecum, faeces, ileum and jejunum) and geographical location were obtained from the Sequence Read Archive and analysed using the MGnify pipeline. Metataxonomic profiles produced across the 602 datasets illustrated the presence of 3 phyla, 25 families and 30 genera, of which core genera (defined by presence in over 90% of datasets) belonged to Lactobacillus, Faecalibacterium, Butyricicoccus, Eisenbergiella, Subdoligranulum, Oscillibacter, Clostridium & Blautia. PERMANOVA analysis also showed that GIT site, bird breed, age and geographical location all had a significant effect on GIT microbial diversity, regardless of dietary factors, which were not considered in this study. On a genus level, Faecalibacterium was most abundant in the caeca, Lactobacillus was most abundant in the faeces, ileum and jejunum, with the data showing that the caeca and faeces were most diverse. AIL F8 progeny, Ross 308 and Cobb 500 breeds GIT bacteria were dominated by Lactobacillus, and Eisenbergiella, Megamonas and Bacteroides were most abundant amongst Sasso-T451A and Tibetan chicken breeds. Microbial communities within each GIT site develop with age, from a Lactobacillus and Streptococcus dominated community during the earlier stages of growth, towards a Faecalibacterium, Eisenbergiella, Bacteroides, Megamonas, and Lactobacillus dominated community during the later stages of life. Geographical locations, and thus environmental effectors, also impacted upon gastrointestinal tract microbiota, with Canadian and European datasets being dominated by Lactobacillus, whilst UK and Chinese datasets were dominated by Eisenbergiella and Bacteroides respectively. This study aids in defining what 'normal' is within poultry gastrointestinal tract microbiota globally, which is imperative to enhancing the microbiome for productive and environmental improvements.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"35"},"PeriodicalIF":4.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of extracts from used Xpert MTB/RIF cartridges for detection of resistance to second-line anti-tuberculosis drugs in patients with multidrug-resistant tuberculosis in Ethiopia.","authors":"Tilahun Ketema, Mulualem Tadesse, Zegeye Bonsa, Getu Balay, Wakjira Kebede, Mekidim Mekonnen, Gemeda Abebe","doi":"10.1186/s12866-025-03746-6","DOIUrl":"https://doi.org/10.1186/s12866-025-03746-6","url":null,"abstract":"<p><strong>Background: </strong>Early and accurate diagnosis of drug resistance, including resistance to second-line anti-tuberculosis (TB) drugs, is crucial for the effective control and management of pre-extensively drug-resistant TB (pre-XDR-TB) and extensively drug-resistant TB (XDR-TB). The Xpert MTB/XDR assay is the WHO recommended method for detecting resistance to isoniazid and second-line anti-TB drugs when rifampicin resistance is detected. Currently, the Xpert MTB/XDR assay is not yet implemented in Ethiopia, thus the MTBDRsl assay continues to be used. However, the MTBDRsl assay requires additional patient visits and specimen collection, which can lead to delays in diagnosis and treatment initiation.</p><p><strong>Objective: </strong>This study aimed to evaluate the feasibility of using extracts from used Xpert MTB/RIF cartridges for detecting resistance to second-line anti-TB drugs by MTBDRsl assay in patients with rifampicin resistant-TB (RR-TB) in Eastern and Western Oromia, Ethiopia.</p><p><strong>Methods: </strong>A cross-sectional diagnostic evaluation study was conducted from June 2020 to May 2021 at two TB Referral Laboratories in Eastern and Western Oromia, Ethiopia. Sputum samples from RR-TB patients were split, with one aliquot being subjected for Xpert testing and the other being cultured on Lowenstein-Jensen media. DNA extracted from the used Xpert cartridges was amplified by PCR and tested by MTBDRsl assay, and the results were compared to those obtained from culture isolates. To establish the detection limits, the MTBDRsl assay was performed on cartridge extracts (CEs) from a series of dilutions of drug-susceptible and multidrug-resistant TB strains.</p><p><strong>Results: </strong>The MTBDRsl on CEs from dilutions at ≥ 10² CFU/mL (CT ≤ 22) accurately identified susceptibility and resistance patterns for fluoroquinolones (FQL) and second-line injectable drugs (SLIDs). The MTBDRsl on rifampicin-resistant CEs from sputum samples (n = 40) yielded 100% interpretable results for FQL and 90% (4 indeterminate) interpretable results for SLIDs. All interpretable CE results showed complete agreement with the MTBDRsl results from the culture isolates.</p><p><strong>Conclusion: </strong>This study demonstrated the feasibility of using extracts from used Xpert MTB/RIF cartridges for detecting resistance to second-line anti-TB drugs using the MTBDRsl assay. This approach could mitigate the need for additional specimen collection and allow for earlier treatment initiation, potentially improving patient outcomes and reducing the transmission of drug-resistant TB strains.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"26"},"PeriodicalIF":4.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11740401/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing the synergy of Urochloa brizantha and Amazonian Dark Earth microbiomes for enhanced pasture recovery.","authors":"Anderson Santos de Freitas, Luís Felipe Guandalin Zagatto, Gabriel Silvestre Rocha, Franciele Muchalak, Guilherme Lucio Martins, Solange Dos Santos Silva-Zagatto, Rogério Eiji Hanada, Aleksander Westphal Muniz, Siu Mui Tsai","doi":"10.1186/s12866-024-03741-3","DOIUrl":"https://doi.org/10.1186/s12866-024-03741-3","url":null,"abstract":"<p><p>Amazonian Dark Earths (ADEs) are fertile soils from the Amazon rainforest that harbor microorganisms with biotechnological potential. This study aimed to investigate the individual and potential synergistic effects of a 2% portion of ADEs and Urochloa brizantha cv. Marandu roots (Brazil's most common grass species used for pastures) on soil prokaryotic communities and overall soil attributes in degraded soil. We conducted a comprehensive plant succession experiment in the greenhouse, utilizing vase soil samples for next-generation sequencing of 16 S rDNA, enzymatic activity assays, and soil chemical properties analysis. Univariate and multivariate analyses were performed to understand better the prokaryotic interactions within soil environments influenced by ADEs and U. brizantha roots, including differential abundance, diversity, and network analyses. Our findings reveal a complementary relationship between U. brizantha and ADEs, each contributing to distinct positive aspects of soil bacterial communities and quality. The combined influence of U. brizantha roots and ADEs exhibited synergies that enhanced prokaryotic diversity and enzyme activity. This balance supported plant growth and increased the general availability of beneficial bacteria in the soil, such as Chujaibacter and Curtobacterium while reducing the presence of potentially pathogenic taxa. This research provided valuable insights into the intricate dynamics of plant-soil feedback, emphasizing the potential for complementary interactions between specific plant species and unique soil environments like ADEs. The findings highlight the potential for pasture ecological rehabilitation and underscore the benefits of integrating plant and soil management strategies to optimize soil characteristics.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"27"},"PeriodicalIF":4.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11740394/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gender-specific antibiotic-resistance patterns and characterization of bacterial flora of undergraduate students' mobile phones and associated factors at a Nigerian university.","authors":"Morufat Oluwatosin Olaitan, Akeem Ganiyu Rabiu, Zara Babagana Umara","doi":"10.1186/s12866-025-03766-2","DOIUrl":"https://doi.org/10.1186/s12866-025-03766-2","url":null,"abstract":"<p><strong>Background: </strong>Technological development has led to the wide use of mobile phones. However, the role of the hand-held device in the possible spread of antibiotic-resistant bacterial pathogens considering gender variation, especially among Nigerian undergraduates is poorly understood. This study aimed to assess bacterial isolates recovered from male and female mobile phones for antibiotic resistance and determine possible factors that could facilitate their spread.</p><p><strong>Methods: </strong>Forty (40) undergraduates were included in the study with gender parity. Swabs of the undergraduates' mobile phones were cultured and bacterial isolates were identified using standard microbiology methods. Antibiotic susceptibility testing (AST) of the isolates was done using the Kirby-Bauer disc diffusion assay and the results were interpreted by the Clinical Standards and Laboratory Institute (CLSI) guideline. Bacterial isolates (n = 6/21) that resisted antibiotics belonging to ≥ 3 different classes regarded as multidrug resistant (MDR) were subjected to 16 S rRNA sequencing and identified using the Basic Local Alignment Search Tool (BLAST) algorithm.</p><p><strong>Results: </strong>The total bacterial count of male (11.1 × 10⁶ ± 4.0) CFU/mL and female (11.7 × 10⁶ ± 6.4) CFU/mL were high though comparable. Of the 25 isolates recovered, 10 and 15 were respectively from male and female mobile phones. Staphylococcus aureus (n = 11) was the most occurring isolate followed by Escherichia coli (n = 5), and Salmonella sp. (n = 3); the rest occurred less frequently. Staphylococcus aureus obtained from male phones (n = 7) is higher than in females (n = 4) but the species diversity is greater in females (n = 7) than in males (n = 3) phones. Isolates were resistant to ampiclox and zinnacef (85.71%), erythromycin (78.57%), amoxil and augmentin (72.73%), septrim (72%), rifampicin (71.43%) while > 80% were MDR. Low levels of handwashing and non-use of hand sanitizer could be linked with phone bacterial contamination.</p><p><strong>Conclusion: </strong>Frequent handwashing and the use of hand sanitizers should be prioritized among undergraduates to curtail the spread of difficult-to-treat bacterial infections.</p>","PeriodicalId":9233,"journal":{"name":"BMC Microbiology","volume":"25 1","pages":"30"},"PeriodicalIF":4.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143000436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}