Brazilian Journal of Microbiology最新文献

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Exploring extended-spectrum beta lactamase resistance in Vibrio parahaemolyticus and Vibrio cholerae within the tropical mangrove ecosystem of southwest India. 探索印度西南部热带红树林生态系统中副溶血性弧菌和霍乱弧菌对广谱β内酰胺酶的耐药性。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-06-04 DOI: 10.1007/s42770-024-01404-z
Gopika Sivan, Hridya V K, Divya P Sukumaran, Mohamed Hatha Abdulla
{"title":"Exploring extended-spectrum beta lactamase resistance in Vibrio parahaemolyticus and Vibrio cholerae within the tropical mangrove ecosystem of southwest India.","authors":"Gopika Sivan, Hridya V K, Divya P Sukumaran, Mohamed Hatha Abdulla","doi":"10.1007/s42770-024-01404-z","DOIUrl":"10.1007/s42770-024-01404-z","url":null,"abstract":"<p><p>Multidrug-resistant pathogenic vibrios are a crisis of concern as they cause multiple illnesses, including gastroenteritis in humans and acute hepatopancreatic necrosis in aquaculture. In the current study, we investigated the prevalence of the beta-lactamase gene CTX-M-group 1 in Vibrio spp. (Vibrio cholerae and Vibrio parahaemolyticus) from the water and sediment of urban tropical mangrove ecosystems of Kerala, southwest India. A total of 120 isolates of Vibrio spp. were tested for antibiotic susceptibility to 14 antibiotics. In water, ampicillin resistance was very high in isolates of V. cholerae (94.1%, n = 17) and V. parahaemolyticus (89.1%, n = 46). 26.9% of V. parahaemolyticus and 14.2% of V. cholerae harbored the CTX-M-group 1 gene in water samples. Compared to V. cholerae, the CTX-M-group 1 gene was exclusively hosted by V. parahaemolyticus (49%) in sediment samples. A significant difference in the prevalence of the CTX-M-group 1 gene was observed among Vibrio spp. in both water and sediment samples (p < 0.05). The results revealed the presence of multidrug-resistant and beta-lactamase harboring Vibrio spp. in mangrove ecosystems, which may have evolved as a consequence of the misuse and abuse of broad-spectrum antibiotics as prophylaxis in human health care and aquaculture.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2335-2343"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405589/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141236742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phylum-level studies of bacterial cutinases for unravelling enzymatic specificity toward PET degradation: an in silico approach. 细菌角质酶的门级研究,以揭示 PET 降解酶的特异性:一种硅学方法。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-05-15 DOI: 10.1007/s42770-024-01362-6
Shubham Kumar, Bhupendra Chaudhary, Barkha Singhal
{"title":"Phylum-level studies of bacterial cutinases for unravelling enzymatic specificity toward PET degradation: an in silico approach.","authors":"Shubham Kumar, Bhupendra Chaudhary, Barkha Singhal","doi":"10.1007/s42770-024-01362-6","DOIUrl":"10.1007/s42770-024-01362-6","url":null,"abstract":"<p><p>The overwhelming use of PET plastic in various day-to-day activities led to the voluminous increase in PET waste and growing environmental hazards. A plethora of methods have been used that are associated with secondary pollutants. Therefore, microbial degradation of PET provides a sustainable approach due to its versatile metabolic diversity and capacity. The present work highlights the cutinase enzyme's role in PET degradation. This study focuses on the bacterial cutinases homologs screened from 43 reported phylum of bacteria. The reported bacterial cutinases for plastic degradation have been chosen as reference sequences, and 917 sequences have shown homology across the bacterial phyla. The dienelactone hydrolase (DLH) domain was identified for attaining specificity towards PET binding in 196 of 917 sequences. Various computational tools have been used for the physicochemical characterization of 196 sequences. The analysis revealed that most selected sequences are hydrophilic, extracellular, and thermally stable. Based on this analysis, 17 sequences have been further pursued for three-dimensional structure prediction and validation. The molecular docking studies of 17 selected sequences revealed efficient PET binding with the three sequences derived from the phylum Bacteroidota, the lowest binding energy of -5.9 kcal/mol, Armatimonadota, and Nitrososphaerota with -5.8 kcal/mol. The two enzyme sequences retrieved from the phylum Bacteroidota and Armatimonadota are metagenomically derived. Therefore, the present studies concluded that there is a high probability of finding cutinase homologs in various environmental resources that can be further explored for PET degradation.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2385-2400"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405750/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140943922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of epidemiological and clinical aspects in cases of fungal osteomyelitis caused by non-Candida species. 由非念珠菌引起的真菌性骨髓炎病例的流行病学和临床方面的分析。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-06-19 DOI: 10.1007/s42770-024-01418-7
Jorge Andrés González Grijalva, Vítor Falcão de Oliveira, Vladimir Cordeiro de Carvalho, Priscila Rosalba de Oliveira, Ana Lúcia L Lima
{"title":"Analysis of epidemiological and clinical aspects in cases of fungal osteomyelitis caused by non-Candida species.","authors":"Jorge Andrés González Grijalva, Vítor Falcão de Oliveira, Vladimir Cordeiro de Carvalho, Priscila Rosalba de Oliveira, Ana Lúcia L Lima","doi":"10.1007/s42770-024-01418-7","DOIUrl":"10.1007/s42770-024-01418-7","url":null,"abstract":"<p><p>Osteomyelitis caused by non-Candida species is rare and often neglected, and current recommendations are based on primarily clinical experience and expert opinion. The objective of this study was to describe a case series of non-Candida fungal osteomyelitis. This retrospective study included 10 patients with non-Candida fungal osteomyelitis. Patients with osteomyelitis and microbiologically confirmed non-Candida species from bone fragment cultures were selected from the institution Infection Control Board database. Fusarium spp. were the most commonly isolated fungus from bone fragment cultures in five patients (50%). The majority did not present immunosuppression. The most common etiology was post-traumatic (n = 7, 70%), particularly open fractures. All patients were treated with antifungals associated with surgery. The antifungals used were itraconazole in five patients (50%), and voriconazole in another five patients (50%), with a median duration of antifungal therapy of four weeks (range: 3-25). There were no observed deaths within 30 days and one year. An antifungal approach combined with surgical treatment demonstrated favorable clinical outcomes, including low mortality rates and effective remission.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2783-2788"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405654/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141417721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cyanobacterial biocrust alters soil physical properties reducing soil erosion and aerosol production. 蓝藻生物簇改变了土壤的物理特性,减少了土壤侵蚀和气溶胶的产生。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-06-26 DOI: 10.1007/s42770-024-01377-z
Amir Karimi, Arezoo Tahmourespour, Mehran Hoodaji
{"title":"Cyanobacterial biocrust alters soil physical properties reducing soil erosion and aerosol production.","authors":"Amir Karimi, Arezoo Tahmourespour, Mehran Hoodaji","doi":"10.1007/s42770-024-01377-z","DOIUrl":"10.1007/s42770-024-01377-z","url":null,"abstract":"<p><p>Aerosol emission by wind erosion in the arid and semi-arid areas of the world, is of environmental and health significance. Different methods have been used to mitigate aerosol emission among which the biological methods may be the most efficient ones. Although previously investigated, more research is essential to determine how the use of exopolysaccharide (biocrust)-producing cyanobacteria may affect soil physical properties. The objective was to investigate the effects of the cyanobacteria, Microcoleus vaginatus ATHK43 (identified and registered by the NCBI accession number MW433686), on soil physical properties of a sandy soil 15, 30, 60, and 90 d after inoculation. The effects of cyanobacterial biocrust on soil properties including shear strength, soil resistance, aggregate stability (mean weight diameter (MWD) and geometric mean diameter (GMD)), and wind erosion were determined in trays using a wind tunnel. Cyanobacterial inoculation significantly increased MWD (0-1 cm depth, from 0.12 mm to 0.47 mm) and GMD (from 0.3 to 0.5 mm) after a period of 90 d. Biocrust production significantly decreased soil erosion from 55.7 kgm<sup>- 2</sup> to 0.3 kgm<sup>- 2</sup> (wind rate of 50 kmh<sup>- 1</sup>), and from 116.42 kgm<sup>- 2</sup> to 0.6 kgm<sup>- 2</sup> (wind rate of 90 kmh<sup>- 1</sup>) after 90 d. In conclusion, cyanobacterial biocrust can significantly improve soil physical properties in different parts of the world including the deserts, and reduce aerosol emission by mitigating the destructive effects of wind erosion on soil physical properties.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2453-2461"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405739/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141449660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Existence of rare actinobacterial forms in the Indian sector of Southern Ocean: 16 S rRNA based metabarcoding study. 南大洋印度洋海域罕见放线菌的存在:基于 16 S rRNA 的代谢编码研究。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-07-11 DOI: 10.1007/s42770-024-01424-9
Radhakrishnan Manikkam, Manigundan Kaari, Abirami Baskaran, Meganathan P Ramakodi, Gopikrishnan Venugopal, Parli Venkateswaran Bhaskar
{"title":"Existence of rare actinobacterial forms in the Indian sector of Southern Ocean: 16 S rRNA based metabarcoding study.","authors":"Radhakrishnan Manikkam, Manigundan Kaari, Abirami Baskaran, Meganathan P Ramakodi, Gopikrishnan Venugopal, Parli Venkateswaran Bhaskar","doi":"10.1007/s42770-024-01424-9","DOIUrl":"10.1007/s42770-024-01424-9","url":null,"abstract":"<p><p>The significance of the Southern Ocean (SO) as a sink of atmospheric CO<sub>2</sub> and other greenhouse gases is well established. Earlier studies have highlighted the role of microbes in various SO ecosystem processes. However, the diversity and role of actinobacteria in the Indian sector of SO (ISO) water and sediments are unknown. This study aimed to analyze the diversity of actinobacteria in water and sediment samples of SO based on amplicon microbiome analyses. The taxonomic analysis identified a total number of 27 phyla of which Proteobacteria (40.2%), Actinobacteria (13.6%), and Firmicutes (8.7%) were found to be dominant. The comparative study of water and sediment samples revealed the dominance of different actinobacteria in water and sediments. While the order Streptomycetales was dominant in the water samples, Micrococcales was found to be dominant in the sediment samples. The genus level analysis found the presence of eight and seventeen genera in the sediment and water samples, respectively. The genus Streptomyces, Saccharopolyspora, Nocardioides, Sva0996 marine group, and Mycobacterium were seen both in sediment and water samples. Marmoricola, Ilumatobacter, and Glaciihabitans were observed only in sediment samples whereas Rhodococcus, Corynebacterium, Micrococcus, Turicella, Pseudonocardia, Bifidobacterium, Nesterenkonia, Collinsella, Knoellia, Cadidatus, Actinomarina, Libanicoccus and Cutibacterium were noticed exclusively in water samples. Our study also emphasizes the need for further detailed study to understand the links between actinobacterial diversity and their ecological functions in the ISO. The available metabarcoding data paves the way for future research in cultivable forms of novel and rare Actinobacteria for their bioprospecting applications.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2363-2370"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405354/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141578942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detection of Mycoplasma spp. in free-living seabirds. 在自由生活的海鸟中检测支原体。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-06-04 DOI: 10.1007/s42770-024-01409-8
Samara Gomes de Brito, Thomas Salles Dias, Leandro Dos Santos Machado, Jenif Braga de Souza, Nathalie Costa da Cunha, Virginia Léo de Almeida Pereira, Maria Lúcia Barreto, Aloysio de Mello Figueiredo Cerqueira, Felipe Piedade Gonçalves Neves
{"title":"Detection of Mycoplasma spp. in free-living seabirds.","authors":"Samara Gomes de Brito, Thomas Salles Dias, Leandro Dos Santos Machado, Jenif Braga de Souza, Nathalie Costa da Cunha, Virginia Léo de Almeida Pereira, Maria Lúcia Barreto, Aloysio de Mello Figueiredo Cerqueira, Felipe Piedade Gonçalves Neves","doi":"10.1007/s42770-024-01409-8","DOIUrl":"10.1007/s42770-024-01409-8","url":null,"abstract":"<p><p>This study aimed to investigate the presence of Mycoplasma spp. and identify the species of mycoplasma isolates obtained from seabirds found on Brazilian coastal beaches. Tracheal and cloacal swab samples were collected from 50 seabirds rescued by three conservation and marine animal rehabilitation centers located in Brazil. The tracheal and cloacal samples were subjected to mycoplasma culture and the isolates were identified through PCR. A \"Mollicutes-specific\" 16S rRNA PCR reaction was employed for triage. Four species-specific PCR reactions were used to detect Mycoplasma gallisepticum, Mycoplasma synoviae, Mycoplasma meleagridis, or M. gallinarum. The Mollicutes positive and species negative samples were submitted do 16S rRNA sequencing. Eighteen (36%) of 50 seabirds tested positive for mycoplasma by culture. In the PCR for the genus, 28 (56%) of 50 seabirds were positive for Mycoplasma spp., with 13 (26%) detected in the trachea, one (2%) in the cloaca, and 14 (28%) in both sites. In the species-specific PCR, M. gallisepticum was detected in 17.8%, and M. meleagridis in 17.8%. Both species were detected in 14.3%. Of the isolates not characterized at species level, we obtained ten sequences and they were divided into three clusters. The first cluster was closely related to M. meleagridis, the second to M. synoviae, and the third grouped M. tully, M. gallisepticum, and M. imitans. Four and five of nine species of seabirds studied had mycoplasma detected by culture or PCR, respectively. Mycoplasmas were found in the majority of the animals studied, with the highest prevalence proportionally found in Sula leucogaster, and the lowest in Fregata magnificens. The phylogenetic analysis identified Mycoplasma spp. adapted to aquatic birds.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2937-2942"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405359/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141236739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Different light intensity on Messastrum gracile growth under phototrophic cultivation in laboratory. 不同光照强度对实验室光营养栽培中 Messastrum gracile 生长的影响
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-06-06 DOI: 10.1007/s42770-024-01389-9
Lúcia Helena Sipaúba-Tavares, Jesaias Ismael da Costa, Débora Cristina Fenerick
{"title":"Different light intensity on Messastrum gracile growth under phototrophic cultivation in laboratory.","authors":"Lúcia Helena Sipaúba-Tavares, Jesaias Ismael da Costa, Débora Cristina Fenerick","doi":"10.1007/s42770-024-01389-9","DOIUrl":"10.1007/s42770-024-01389-9","url":null,"abstract":"<p><p>The present research evaluates the effects of three different lighting intensities, 60 (control), 30 and 120 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> on Messastrum gracile growth. The observations indicated that a light intensity of 60 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> resulted in higher cell density during experimental period. The light intensity of 120 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> had a strong negative impact on M. gracile growth. Parameters such as lipid and protein content, cell density, chlorophyll-a and biomass were lower compared to the other light intensities. On the 14th and 21st growth days, the biomass, lipid and protein content were higher at 60 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> with 800 mg L<sup>- 1</sup>, 5.7% and 34.4% biomass dry weight, respectively. The study also highlighted the economic aspects of M. gracile cultivation. The light intensities 30 and 60 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> were found to be more advantageous than 120 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> in terms of biomass, unit cost, lipid and protein content. Based on these findings, it was concluded that the light intensities of 30 and 60 µmol photons m<sup>- 2</sup> s<sup>- 1</sup> are more viable for M. gracile cultivation in laboratory under conditions used.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2189-2197"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405606/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141261212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revolutionizing food safety with electrochemical biosensors for rapid and portable pathogen detection. 利用电化学生物传感器快速、便携地检测病原体,彻底改变食品安全。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-06-26 DOI: 10.1007/s42770-024-01427-6
Brígida D' Ávila Oliveira, Raíssa Soares Gomes, Alice Mendes de Carvalho, Emília Maria França Lima, Uelinton Manoel Pinto, Luciana Rodrigues da Cunha
{"title":"Revolutionizing food safety with electrochemical biosensors for rapid and portable pathogen detection.","authors":"Brígida D' Ávila Oliveira, Raíssa Soares Gomes, Alice Mendes de Carvalho, Emília Maria França Lima, Uelinton Manoel Pinto, Luciana Rodrigues da Cunha","doi":"10.1007/s42770-024-01427-6","DOIUrl":"10.1007/s42770-024-01427-6","url":null,"abstract":"<p><p>Foodborne diseases remain a worldwide concern, despite the advances made in sanitation, pathogen surveillance and food safety management systems. The methods routinely applied for detecting pathogens in foods are time consuming, labor intensive and usually require trained and qualified individuals. The objective of this review was to highlight the use of biosensors, with a focus on the electrochemical devices, as promising alternatives for detecting foodborne pathogens. These biosensors present high speed for obtaining results, with the possibility of evaluating foods in real time, at low cost, ease of use, in addition to being compact and portable. These aspects are considered advantageous and suitable for use in food safety management systems. This work also shows some limitations for the application of biosensors, and we present perspectives with the development and use of nanomaterials.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2511-2525"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405362/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141449661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phenotypic and molecular characterization of clinically isolated antibiotics-resistant S. aureus (MRSA), E. coli (ESBL) and Acinetobacter 1379 bacterial strains. 临床分离的耐抗生素金黄色葡萄球菌 (MRSA)、大肠杆菌 (ESBL) 和 1379 号不动杆菌菌株的表型和分子特征。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-05-22 DOI: 10.1007/s42770-024-01347-5
Daraksha Iram, Manish Singh Sansi, Anil Kumar Puniya, Kamal Gandhi, Sunita Meena, Shilpa Vij
{"title":"Phenotypic and molecular characterization of clinically isolated antibiotics-resistant S. aureus (MRSA), E. coli (ESBL) and Acinetobacter 1379 bacterial strains.","authors":"Daraksha Iram, Manish Singh Sansi, Anil Kumar Puniya, Kamal Gandhi, Sunita Meena, Shilpa Vij","doi":"10.1007/s42770-024-01347-5","DOIUrl":"10.1007/s42770-024-01347-5","url":null,"abstract":"<p><p>Antibiotic-resistant bacteria causing nosocomial infections pose a significant global health concern. This study focused on examining the lipid profiles of both non-resistant and clinically resistant strains of Staphylococcus aureus (MRSA 1418), E. coli (ESBL 1384), and Acinetobacter 1379. The main aim was to investigate the relationship between lipid profiles, hydrophobicity, and antibiotic resistance so as to identify the pathogenic potential and resistance factors of strains isolated from patients with sepsis and urinary tract infections (UTIs). The research included various tests, such as antimicrobial susceptibility assays following CLSI guidelines, biochemical tests, biofilm assays, and hydrophobicity assays. Additionally, gas chromatography mass spectrometry (GC-MS) and GC-Flame Ionization Detector (GC-FID) analysis were used for lipid profiling and composition. The clinically isolated resistant strains (MRSA-1418, ESBL-1384, and Acinetobacter 1379) demonstrated resistance phenotypes of 81.80%, 27.6%, and 63.6%, respectively, with a multiple antibiotic resistance index of 0.81, 0.27, and 0.63. Notably, the MRSA-1418 strain, which exhibited resistance, showed significantly higher levels of hemolysin, cell surface hydrophobicity, biofilm index, and a self-aggregative phenotype compared to the non-resistant strains. Gene expression analysis using quantitative real-time PCR (qPCR). Indicated elevated expression levels of intercellular adhesion biofilm-related genes (icaA, icaC, and icaD) in MRSA-1418 (pgaA, pgaC, and pgaB) and Acinetobacter 1379 after 24 h compared to non-resistant strains. Scanning electron microscopy (SEM) was employed for structural investigation. These findings provide valuable insights into the role of biofilms in antibiotic resistance and suggest potential target pathways for combating antibiotic-resistant bacteria.</p>","PeriodicalId":9090,"journal":{"name":"Brazilian Journal of Microbiology","volume":" ","pages":"2293-2312"},"PeriodicalIF":2.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405748/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141075249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isolation, screening, and characterization of the newly isolated osmotolerant yeast Wickerhamomyces anomalus BKK11-4 for the coproduction of glycerol and arabitol. 分离、筛选和鉴定新分离的耐渗透性酵母 Wickerhamomyces anomalus BKK11-4,以共同生产甘油和阿拉伯糖醇。
IF 2.1 4区 生物学
Brazilian Journal of Microbiology Pub Date : 2024-09-01 Epub Date: 2024-05-22 DOI: 10.1007/s42770-024-01383-1
Jesnipit Thammaket, Piroonporn Srimongkol, Paweena Ekkaphan, Sitanan Thitiprasert, Sorapat Niyomsin, Thanyalak Chaisuwan, Suwabun Chirachanchai, Nuttha Thongchul
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