Revista Argentina de microbiologia最新文献_第2页

Caracterización molecular de aislamientos de Listeria monocytogenes de origen humano y alimentario en Argentina, 2018-2023 [2018-2023年阿根廷从人类和食物中分离的单核细胞增生李斯特菌的分子特征]。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.03.002

{"title":"Caracterización molecular de aislamientos de Listeria monocytogenes de origen humano y alimentario en Argentina, 2018-2023","authors":"","doi":"10.1016/j.ram.2024.03.002","DOIUrl":"10.1016/j.ram.2024.03.002","url":null,"abstract":"<div>Human listeriosis is an infectious disease caused by Listeria monocytogenes. The invasive form of this disease leads to a high rate of hospitalizations and fatality. The main mode of transmission is through contaminated ready-to-eat foods such as dairy, vegetables and meat products. The knowledge of the diversity and population dynamics of isolates collected from human and food sources is essential for the detection of clusters and the identification of common sites of infection. The aim of this study was the molecular characterization of L. monocytogenes isolates in Argentina. We sequenced a total of 63 isolates, 35 from human and 28 from food sources, collected between 2018 and 2023. Our genomic study divided the isolates into two lineages, four serogroups, 17 sequence types and 15 clonal complexes (CCs). The hypervirulent clone CC1 (lineage I; serogroup IVb) predominated in human and food samples. The phylogenomic analysis showed a high and possible epidemiological relationship between isolates from human and/or food sources, suggesting the presence of transmission chains in our country. These findings highlight the need to strengthen genomic surveillance of L. monocytogenes in Argentina. The identification of geographic distribution and characteristics of predominant and emerging clones from human and food sources might help to focus action plans and public health policies better directed at the control and prevention of listeriosis.</div>","PeriodicalId":21163,"journal":{"name":"Revista Argentina de microbiologia","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0325754124000427/pdfft?md5=30bf52e2d9d8339ac85d9f6231190014&pid=1-s2.0-S0325754124000427-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141247501","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

Los fructanos de agave promueven la formación de biopelícula in vitro en el consorcio probiótico Lactobacillus delbrueckii ssp. lactis, L. delbrueckii ssp. bulgaricus y Streptococcus thermophilus [龙舌兰果糖促进益生菌联合体--德尔布鲁贝克乳杆菌、保加利亚乳杆菌和嗜热链球菌--体外生物膜的形成]。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.02.002

{"title":"Los fructanos de agave promueven la formación de biopelícula in vitro en el consorcio probiótico Lactobacillus delbrueckii ssp. lactis, L. delbrueckii ssp. bulgaricus y Streptococcus thermophilus","authors":"","doi":"10.1016/j.ram.2024.02.002","DOIUrl":"10.1016/j.ram.2024.02.002","url":null,"abstract":"<div>In recent years the relationship between the intestinal microbiota, the host and chronic non-communicable diseases has brought interest into the study of its formation and maintenance in the host. Lactic acid bacteria (BAL) are Gram-positive bacteria with probiotic activity, which have been associated with many health benefits, such as decreased body fat mass and lower risk of type II diabetes mellitus. One of the main colonization mechanisms and bacteria survival strategies is the production of biofilms and the use of prebiotics as substrates to achieve a balance within intestinal microbiota. However, there is not enough evidence to demonstrate the biofilm formation in the presence of agave fructans (AF). This study aimed to evaluate in vitro the biofilm formation in a consortium of lactic acid bacteria: Lactobacillus delbrueckii ssp. lactis, Lactobacillus delbrueckii ssp. bulgaricus y Streptococcus thermophilus in the presence of AF at different concentrations: 0%, 0,1%, 4%, 8% y 16%. The addition of 0,1% of AF correlates with the best capacity for biofilm formation. The findings imply the possibility of modulating the biofilm formation of lactic acid bacteria with AF. These results can contribute positively to the host, by generating intestinal homeostasis, colonization resistance, stability to food digestion and chemical modifications of drugs and carry out beneficial functions to the health.</div>","PeriodicalId":21163,"journal":{"name":"Revista Argentina de microbiologia","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S032575412400021X/pdfft?md5=7219cc8e88340733c0eaa2a67d5aa82b&pid=1-s2.0-S032575412400021X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140787164","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

Primer caso autóctono de fiebre manchada asociado a la Reserva Ecológica Costanera Sur, Ciudad Autónoma de Buenos Aires [与布宜诺斯艾利斯市南海岸生态保护区有关的首例自生斑疹热病例]。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.06.001

Jessica Monroig , Marina de Seta , Jose Carranza , Sergio Giamperetti , Bettina Deodato , Rita Armitano , Paula Díaz Pérez , María Nazarena de Salvo , Gabriel Leonardo Cicuttin , Susana Lloveras

引用次数: 0

Obtaining more contaminant-resistant variants from a native Chlorella vulgaris strain 从本地绿藻菌株中获取更多抗污染变种。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.05.005

Andrea G. Trentini , Uriel D. Salvio , Juan G. Sánchez Novoa , María D. Groppa , Juana M. Navarro Llorens , Patricia L. Marconi

{"title":"Obtaining more contaminant-resistant variants from a native Chlorella vulgaris strain","authors":"Andrea G. Trentini , Uriel D. Salvio , Juan G. Sánchez Novoa , María D. Groppa , Juana M. Navarro Llorens , Patricia L. Marconi","doi":"10.1016/j.ram.2024.05.005","DOIUrl":"10.1016/j.ram.2024.05.005","url":null,"abstract":"<div>Cildáñez stream (in Matanza-Riachuelo basin, Buenos Aires) is one of the most polluted watercourses of Argentina, containing a mixed contamination from agricultural and industrial wastes. The application of water bioremediation processes for this kind of effluent will require microorganisms with a high tolerance to contamination. In this sense, obtaining higher contaminant-resistant microalgae lines is widely desired. In this study, adaptive laboratory evolution (ALE) and random mutagenesis were used to obtain Chlorella vulgaris LMPA-40 strains adapted to grow in polluted water from the Cildáñez stream. The ALE process was performed by 22 successive subcultures under selective pressure (Cildáñez wastewater alone or with the addition of phenol or H2O2) while random mutagenesis was performed with UV-C radiation at 275nm. Not all the cell lines obtained after ALE could adapt enough to overcome the stress caused by the Cildáñez wastewater, indicating that the process is quite random and depends on the stressor used. The best results were obtained for the Cildáñez wastewater adapted cells (Cild 3 strain) that were more resistant than the original strain. The concentration of protein, Chlorophyll A, Chlorophyll B, and carotenoids in the Cild 3 ALE evolved strain was higher than that of the control strain. However, this strain exhibited half of the lipid content compared to the same control strain. Interestingly, these alterations and the acquired tolerance may be reversed over time during storage. These findings suggest that the acquisition of novel cell lines could not be permanent, a fact that must be considered for future trials.</div>","PeriodicalId":21163,"journal":{"name":"Revista Argentina de microbiologia","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0325754124000816/pdfft?md5=7d5205e469aa55049c1fcd77cc9f95be&pid=1-s2.0-S0325754124000816-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875852","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

Are Mycoplasma pneumoniae coinfections frequent in COVID-19 patients? A systematic review COVID-19 患者是否经常合并肺炎支原体感染？系统综述。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.05.002

{"title":"Are Mycoplasma pneumoniae coinfections frequent in COVID-19 patients? A systematic review","authors":"","doi":"10.1016/j.ram.2024.05.002","DOIUrl":"10.1016/j.ram.2024.05.002","url":null,"abstract":"<div>Understanding the proportion of SARS-CoV-2 patients with Mycoplasma pneumoniae coinfection is crucial for treating patients suffering from coronavirus disease (COVID-19), help to ensure responsible use of antibiotics and minimize the negative consequences of overuse. In addition, this knowledge could have an impact on empirical antibiotic management guidelines for patients with COVID-19. This systematic review aimed to identify the prevalence of M. pneumoniae in patients with coronavirus disease 2019 (COVID-19).A bibliographic search of studies published in Spanish or English was conducted using the PubMed search engine. Fourteen articles from different continents (America, Asia and Europe) were included, involving a total of 5855 patients in these studies. The mean age of COVID-19 patients with M. pneumoniae was 48 years old (range 1–107), most of whom were male. The detection of laboratory-confirmed M. pneumoniae infection varied between 0 and 33.3%. Most of patients referred fever, cough, and dyspnea, and received empirical antibiotic treatment. Bacterial coinfection was not associated with increased ICU admission and mortality. The prevalence of coinfection showed extremely dissimilar figures according to the population studied and diagnostic criteria. However, it is important to develop Latin American studies, given the heterogeneity observed in the studies conducted in different countries. Standardized definitions should be developed in order to be able to assess the impact of coinfections in patients with a diagnosis of COVID-19.</div>","PeriodicalId":21163,"journal":{"name":"Revista Argentina de microbiologia","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0325754124000579/pdfft?md5=3b034561413e71059901f11d0e326c22&pid=1-s2.0-S0325754124000579-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141591215","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

Arthrobacter sp. UMCV2, and its compound N,N-dimethylhexadecilamine promote nodulation in Medicago truncatula by Sinorhizobium medicae 节杆菌 UMCV2 及其化合物 N,N-二甲基十六烷基二胺可促进药用中部单胞菌（Sinorhizobium medicae）在蔓生美智子（Medicago truncatula）中的结球作用。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.03.004

引用次数: 0

Cyanobacteria in soils under dryland agricultural production systems 旱地农业生产系统土壤中的蓝藻。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.03.003

引用次数: 0

Risk factors and mortality of candidemia in a children's public hospital in Sao Paulo, Brazil 巴西圣保罗一家公立儿童医院念珠菌病的风险因素和死亡率。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2023.09.002

{"title":"Risk factors and mortality of candidemia in a children's public hospital in Sao Paulo, Brazil","authors":"","doi":"10.1016/j.ram.2023.09.002","DOIUrl":"10.1016/j.ram.2023.09.002","url":null,"abstract":"<div>Candida bloodstream infections in children are of special concern in neonatal and pediatric intensive care and patients with comorbidities. This study aimed to estimate the incidence and risk factors associated with mortality in candidemia cases occurring in a public children's hospital in Ribeirao Preto, Brazil. It is a retrospective transversal study. Every patient under the age of 18 admitted to the study facility from January 1, 2013, to December 31, 2019, was considered potentially eligible to be included if they had candidemia. We collected clinical data from medical records. We included 113 blood cultures yielding positive results for Candida. The incidence rate was 2.12 per 1000 admissions. The most common Candida species was Candida parapsilosis. Septic shock during the candidemia episode was the only clinical outcome associated with a relative risk-adjusted (RRa) of 2.77 with an interval >1 (1.12–6.85). Our findings show that the incidence rate and mortality rates of candidemia are in line with those in other children's services in Brazil. We found a global mortality rate of 28.31% (32/113) from candidemia episodes. We highlight the predominance of non-albicans Candida species including C. parapsilosis. Septic shock was the most important factor showing a significant risk of mortality.</div>","PeriodicalId":21163,"journal":{"name":"Revista Argentina de microbiologia","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0325754124000397/pdfft?md5=6754201fe6750d6241830260f8b16981&pid=1-s2.0-S0325754124000397-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140757970","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

Emergence of lineage III of Shigella sonnei ST152 belonging to a high-risk clone harboring the blaCTX-M-15 gene in Peru 秘鲁出现了属于携带 blaCTX-M-15 基因的高风险克隆的子代志贺氏菌 ST152 第三系。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.02.007

{"title":"Emergence of lineage III of Shigella sonnei ST152 belonging to a high-risk clone harboring the blaCTX-M-15 gene in Peru","authors":"","doi":"10.1016/j.ram.2024.02.007","DOIUrl":"10.1016/j.ram.2024.02.007","url":null,"abstract":"<div>Multidrug-resistant Shigella sonnei ST152, global lineage III, is a high-risk clone, whose dissemination has limited therapeutic options for shigellosis. This study aimed to characterize two isolates of S. sonnei, which were recovered in Lima, Peru, during November 2019, exhibiting resistance to extended-spectrum cephalosporins and quinolones, and concurrently harboring blaCTX-M-15 and qnrS1 genes, in addition to mutations in gyrA-S83L. These isolates were resistant to ceftriaxone, ciprofloxacin and trimethoprim/sulfamethoxazole. The molecular analysis showed that both isolates belonged to lineage III, sublineages IIIa and IIIb. The blaCTX-M-15 gene was located in the same genetic platform as qnrS1, flanked upstream by ISKpn19, on a conjugative plasmid belonging to the IncI-γ group. To the best of our knowledge, this would be the first report on S. sonnei isolates carrying the blaCTX-M-15 gene in Peru. The global dissemination of S. sonnei ST152, co-resistant to β-lactams and quinolones, could lead to a worrisome scenario in the event of potential acquisition of genetic resistance mechanisms to azithromycin.</div>","PeriodicalId":21163,"journal":{"name":"Revista Argentina de microbiologia","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0325754124000403/pdfft?md5=6c80b341bbe0d9cd0ab43a7c2bf50852&pid=1-s2.0-S0325754124000403-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141284638","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

Compilation of regulations and procedures for monitoring filamentous fungi in hospital environments 医院环境中丝状真菌监测规定和程序汇编。

IF 1.8 4区生物学

Revista Argentina de microbiologia Pub Date : 2024-07-01 DOI: 10.1016/j.ram.2024.02.001

引用次数: 0