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1.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 51(1): 60-66, 2020 Jan.
Artigo em Chinês | MEDLINE | ID: mdl-31950791

RESUMO

Objective: To optimize the preparation parameters of the new silk birth-canal microecology transporter (BMT) for transferring the symbiotic bacteria of the birth canal efficiently. Methods: Birth canal microbial samples of 30 full term pregnant women at admission were collected as the control group (NC, n=30). The experimental group included 18 pregnant women terminated by Cesarean section, who were divided into 6 sub-groups (M1-M6, n=3) to complete the transfer tests of the birth-canal microecology. The new silk BMT was processed in the sterile liquid of the different osmotic pressure with the different immersion depth, and was placed in the vagina of the pregnant women for 1 h before sealed. All extracted DNA specimens were amplified in the V3-V4 region of the 16S rDNA, and were sequenced by Illumina Hiseq2500. Microbial diversity analysis was performed by Mothur, QIIME, Lefse and Metastat. Welch's t-test and Anosim nonparametric test were used to compare the difference between groups. Results: The new silk BMT with 70% immersion depth could be fully covered by the solution, and had good solution preserving and adhesion. The subjects had no foreign body sensation with satisfied experience. Both of the microbes on the new BMT and the control group were lactobacillus as the dominant bacteria genus. The microbial diversity and bacteria constitution in the new BMT was similar to the control group in the condition of 0.45% NaCl solution and 70% immersion depth, and there was no significant difference between the two groups ( P>0.05). Conclusion: The new silk BMT can transfer the symbiotic microbes of the birth canal efficiently, and the optimal preparation parameters were 0.45% hypotonic saline solution and 70% immersion depth.


Assuntos
Técnicas Microbiológicas , Microbiota , Seda , Vagina , Bactérias/classificação , Biodiversidade , Cesárea , Feminino , Humanos , Lactobacillus/fisiologia , Técnicas Microbiológicas/métodos , Microbiota/fisiologia , Gravidez , Vagina/microbiologia
2.
Medicine (Baltimore) ; 98(44): e17704, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31689800

RESUMO

For early diagnosis and treatment of invasive candidiasis (IC), the well-known risk factors may not apply in the intensive care unit (ICU). This retrospective study identified the risk factors predicting IC and candidemia in cancer patients under intensive care after gastrointestinal surgery.Enrolled were 229 cancer patients admitted to our oncology surgical ICU after gastrointestinal surgery between January 1, 2010 and October 31, 2014.The most common types of solid gastrointestinal cancers were gastric (49.8%), colon (20.1%), and esophageal (18.3%). The percentage of patients with corrected Candida colonization index (CCI) ≥0.4 was 31.9%. IC was confirmed in 19 patients (8.3%), and the ICU mortality was 15.8%. Candida albicans accounted for 52.6% of the total number of pathogenic Candida isolates. Among patients with CCI ≥0.4, the cancers with the highest prevalence were cardiac (45%) and gastric (36%), with ICU mortalities of 20% and 4.9%, respectively. For the diagnosis of candidemia, (1-3)-ß-D-glucan (BDG) ≥80 pg/mL showed a sensitivity and specificity of 25% and 82.7%, respectively, positive and negative predictive values 6.7% and 95.7%, and area under the receiver operating characteristic curve 0.512. CCI ≥0.4 was the only significant predictor of IC, and number of organ failures was the only predictor of candidemia (P = .000 and .026).CCI ≥0.4 was the only significant risk factor predicting IC, with greater prediction of intra-abdominal candidiasis but failure to predict candidemia. Blood culture and BDG detection are recommended to supplement diagnosis. Patients may have multifocal and high-grade Candida colonization after cardiac surgery, and; therefore, are at high risk of IC, which should be taken seriously.


Assuntos
Candidemia/epidemiologia , Candidíase Invasiva/epidemiologia , Neoplasias Gastrointestinais/epidemiologia , Neoplasias Gastrointestinais/cirurgia , APACHE , Fatores Etários , Idoso , Candida/crescimento & desenvolvimento , Estado Terminal , Feminino , Hospitais Universitários , Humanos , Unidades de Terapia Intensiva , Tempo de Internação , Masculino , Técnicas Microbiológicas , Pessoa de Meia-Idade , Escores de Disfunção Orgânica , Estudos Retrospectivos , Fatores de Risco , Sepse/epidemiologia
3.
Clin Nephrol ; 92(6): 312-318, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31661062

RESUMO

BACKGROUND: Rapid and accurate microbiological detection is crucial for effective treatment of peritonitis patients with peritoneal dialysis (PD). Although centrifugation of dialysis effluents can increase the pathogen culture-positive rate, a lack of both centrifugation facilities and experienced staff has prevented its widespread implementation, particularly in basic-level hospitals in developing countries. Thus, we developed a simple peritoneal sediment-collecting method, suspension precipitation method, for microbiological diagnosis of peritonitis. MATERIALS AND METHODS: In the suspension precipitation method, drained effluent bags from individual patients were hung for 1 hour to allow the suspension to drip to the bottom layer of the bag for sediment collection. Sediments obtained by centrifugation from the same batch of dialysis effluent were used as positive controls. Both sediment sample types were then cultured in blood-culture bottles. Subsequent analysis of the pathogen-positive detection rate and species comparison between the two methods were undertaken. RESULTS: Among 90 PD patients, the pathogen positive-detection rate between methods was comparable, as demonstrated by 75 (83.33%) with the suspension precipitation method and 77 (85.56%) by the centrifugation method. Their positive pathogen species were also similar, and the concordance rate was 97.78%. CONCLUSION: The suspension precipitation method is a simple, convenient, and reliable peritoneal sediment-collecting method that is suitable for a wide array of uses, particularly in basic-level hospitals without centrifugation technology.


Assuntos
Técnicas Microbiológicas/métodos , Diálise Peritoneal/efeitos adversos , Peritonite/diagnóstico , Precipitação Química , Humanos , Estudos Prospectivos , Suspensões
4.
Enzyme Microb Technol ; 131: 109396, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31615679

RESUMO

Endophytic fungi provide benefits to host plants by producing a diverse class of secondary metabolites (natural products). Arrays of polyketide natural products are synthesized by specific classes of polyketide synthases (PKS I, II and III) in host organisms. In the present study, we attempt to screen and identify type III PKSs in culturable fungal endophytes isolated from the ethno medicinal plants including Arbus precatorius, Bacopa monnieri,Citrus aurantifolia and Datura metel to detect the genetic potential of endophytic fungi in producing bioactive compounds. A total of seventeen endophytic fungal strains belonging to eight genera were identified using fungal morphology and rDNA-ITS phylogenetic analyses. A CODEHOP-PCR based strategy was followed to design degenerate primers for the screening of type III PKS genes from fungal endophytes. We had successfully amplified partial PKS genes from eight endophytes. The amplified PKS sequences showed 60-99% identity to already characterized/putative PKS genes. From the partial sequence of FiPKS from Fusarium incarnatum BMER1, a full-length gene was amplified, cloned and characterized. FiPKScDNA was cloned and expressed in E. coli Lemo21 (DE3) and the purified protein was shown to produce pyrones and resorcinols using acyl-CoA thioesters as substrates. FiPKS showed the highest catalytic efficiency of 7.6 × 104 s-1 M-1 with stearoyl CoA as a starter unit. This study reports the identification and characterization of type III PKS from endophytes of medicinal plants by CODEHOP PCR.


Assuntos
Aciltransferases/genética , Endófitos/enzimologia , Fungos/enzimologia , Plantas Medicinais/microbiologia , Clonagem Molecular , Escherichia coli/genética , Escherichia coli/metabolismo , Fungos/classificação , Fungos/genética , Fungos/isolamento & purificação , Expressão Gênica , Cinética , Técnicas Microbiológicas , Filogenia , Pironas/metabolismo , Resorcinóis/metabolismo , Análise de Sequência de DNA , Homologia de Sequência
5.
BMC Infect Dis ; 19(1): 854, 2019 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-31619188

RESUMO

BACKGROUND: Taenia hydatigena, T. multiceps, T. pisiformis, and Dipylidium caninum are four common large and medium-sized tapeworms parasitizing the small intestine of dogs and other canids. These parasites cause serious impact on the health and development of livestock. However, there are, so far, no commercially available molecular diagnostic kits capable of simultaneously detecting all four parasites in dogs. The aim of the study was therefore to develop a multiplex PCR assay that will accurately detect all four cestode infections in one reaction. METHODS: Specific primers for a multiplex PCR were designed based on corresponding mitochondrial genome sequences, and its detection limit was assessed by serial dilutions of the genomic DNAs of tapeworms examined. Furthermore, field samples of dog feces were tested using the developed assay. RESULTS: A multiplex polymerase chain reaction (PCR) assay was developed based on mitochondrial DNA (mtDNA) that accurately and simultaneously identify four cestode species in one reaction using specific fragment sizes of 592, 385, 283, and 190 bp for T. hydatigena, T. multiceps, T. pisiformis, and D. caninum, respectively. The lowest DNA concentration detected was 1 ng for T. hydatigena, T. multiceps and T. pisiformis, and 0.1 ng for D. caninum in a 25 µl reaction system. This assay offers high potential for the rapid detection of these four tapeworms in host feces simultaneously. CONCLUSIONS: This study provides an efficient tool for the simultaneous detection of T. hydatigena, T. multiceps, T. pisiformis, and D. caninum. The assay will be potentially useful in epidemiological studies, diagnosis, and treatment of these four cestodes infections during prevention and control program.


Assuntos
Cestoides , Infecções por Cestoides , Técnicas Microbiológicas/métodos , Reação em Cadeia da Polimerase Multiplex/métodos , Animais , Cestoides/genética , Cestoides/isolamento & purificação , Infecções por Cestoides/diagnóstico , Infecções por Cestoides/parasitologia , Cães
6.
Plant Dis ; 103(11): 2751-2758, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31509494

RESUMO

Didymella pisi is the primary causal pathogen of Ascochyta blight (AB) of dry pea in Montana. Diagnosis of AB is challenging because there are six different species that cause AB worldwide and that can co-occur. Additionally, agar plate identification of D. pisi is challenging due to its slow growth rate. Currently, there are no PCR-based assays developed for specific detection of D. pisi or any fungal pathogen in the AB complex of dry pea. In this study, we evaluated simple sequence repeat (SSR) primer pairs for their specificity and sensitivity in real-time and conventional SSR-PCR both in vitro and in planta. The specificity of the assay was determined by testing DNA of 10 dry pea varieties, fungal species in the AB complex, and fungal species associated with dry pea. To avoid false-negative results, plant and fungal DNA markers were included as controls in a conventional multiplex SSR-PCR, to amplify any plant or fungal DNA in the absence of the D. pisi SSR target. SYBR Green SSR-quantitative PCR (qPCR) detection was conducted using the same primer pairs but in a uniplex format. D. pisi was specifically amplified, whereas other fungi and host DNA were not. Also, sensitivity experiments showed that the detection limit was 0.01 ng of DNA of D. pisi for both assays and 100 conidia in SSR-qPCR. These assays are valuable diagnostic tools for the detection of D. pisi.


Assuntos
Ascomicetos , Técnicas Microbiológicas , Ervilhas , Reação em Cadeia da Polimerase , Ascomicetos/genética , Limite de Detecção , Técnicas Microbiológicas/métodos , Repetições de Microssatélites/genética , Montana , Ervilhas/microbiologia
7.
Appl Microbiol Biotechnol ; 103(20): 8585-8596, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31511932

RESUMO

Oleaginous microorganisms are of high biotechnological interest being considered as alternative sources of oil (single cell oil-SCO). Current research for increasing productivity of oleaginous microorganisms is focused on the overexpression of genes implicated in lipid synthesis, the inactivation of genes implicated in storage lipid turnover, and on the suppression of competitive to lipid biosynthesis pathways. An alternative strategy, described here, relies on evolution of Yarrowia lipolytica under alternating environments that promote growth, encourage storage lipid synthesis, and reward high energy-containing cells. Derived populations were characterized biochemically, especially on their ability to accumulate lipids, and compared with the starting strain. Interestingly, lipid-accumulating ability early in the evolution was decreased compared with the starting strain. Subsequently, oleaginous lineages dominated, leading to populations able to accumulate lipids in high amounts. A population obtained after 77 generations was able to accumulate 44% w/w of lipid, which was 30% higher than that of the starting strain. We conclude that evolution-based strategies can be utilized as a robust tool for improving lipid accumulation capacity in oleaginous microorganisms.


Assuntos
Metabolismo dos Lipídeos , Lipídeos/análise , Inoculações Seriadas , Yarrowia/crescimento & desenvolvimento , Yarrowia/metabolismo , Técnicas Microbiológicas
9.
J Microbiol ; 57(12): 1048-1055, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31555992

RESUMO

A Gram-stain-negative strictly aerobic, marine bacterium, designated GH2-2T, was isolated from a rhizosphere mudflat of a halophyte (Carex scabrifolia) in Gangwha Island, the Republic of Korea. The cells of the organism were oxidase-positive, catalase-positive, flagellated, short rods that grew at 10-40°C, pH 4-10, and 0-13% (w/v) NaCl. The predominant ubiquinone was Q-10. The major polar lipids were phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol. The major fatty acid is C18:1. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the novel isolate formed an independent lineage at the base of the radiation encompassing members of the genus Thioclava, except for Thioclava arenosa. The closest relatives were T. nitratireducens (96.03% sequence similarity) and T. dalianensis (95.97%). The genome size and DNA G+C content were 3.77 Mbp and 59.6 mol%, respectively. Phylogenomic analysis supported phylogenetic distinctness based on 16S rRNA gene sequences. Average nucleotide identity values were 73.6-74.0% between the novel strain and members of the genus Thioclava. On the basis of data obtained from a polyphasic approach, the strain GH2-2T (= KCTC 62124T = DSM 105743) represents a novel species of a new genus for which the name Hahyoungchilella caricis gen. nov., sp. nov. is proposed. Moreover, the transfer of Thioclava arenosa Thongphrom et al. 2017 to Pseudothioclava gen. nov. as Pseudothioclava arenosa comb. nov. is also proposed. Finally, Thioclava electrotropha Chang et al. 2018 is proposed to be a later heterosynonym of Thioclava sediminum Liu et al. 2017.


Assuntos
Carex (Planta)/microbiologia , Rizosfera , Rhodobacteraceae/classificação , Rhodobacteraceae/isolamento & purificação , Plantas Tolerantes a Sal/microbiologia , Sordariales/classificação , Sordariales/isolamento & purificação , Composição de Bases , Carex (Planta)/fisiologia , DNA Bacteriano , Ácidos Graxos/análise , Concentração de Íons de Hidrogênio , Ilhas , Técnicas Microbiológicas , Filogenia , RNA Ribossômico 16S/genética , República da Coreia , Rhodobacteraceae/genética , Rhodobacteraceae/fisiologia , Plantas Tolerantes a Sal/fisiologia , Sordariales/genética , Sordariales/fisiologia , Ubiquinona/análogos & derivados , Ubiquinona/análise , Sequenciamento Completo do Exoma
10.
BMC Infect Dis ; 19(1): 769, 2019 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-31481123

RESUMO

BACKGROUND: Health-workers in developing countries rely on clinical algorithms, such as the Integrated Management of Childhood Illnesses (IMCI), for the management of patients, including diagnosis of serious bacterial infections (SBI). The diagnostic accuracy of IMCI in detecting children with SBI is unknown. Prediction rules and guidelines for SBI from well-resourced countries at outpatient level may help to improve current guidelines; however, their diagnostic performance has not been evaluated in resource-limited countries, where clinical conditions, access to care, and diagnostic capacity differ. The aim of this study was to estimate the diagnostic accuracy of existing prediction rules and clinical guidelines in identifying children with SBI in a cohort of febrile children attending outpatient health facilities in Tanzania. METHODS: Structured literature review to identify available prediction rules and guidelines aimed at detecting SBI and retrospective, external validation on a dataset containing 1005 febrile Tanzanian children with acute infections. The reference standard, SBI, was established based on rigorous clinical and microbiological criteria. RESULTS: Four prediction rules and five guidelines, including IMCI, could be validated. All examined rules and guidelines had insufficient diagnostic accuracy for ruling-in or ruling-out SBI with positive and negative likelihood ratios ranging from 1.04-1.87 to 0.47-0.92, respectively. IMCI had a sensitivity of 36.7% (95% CI 29.4-44.6%) at a specificity of 70.3% (67.1-73.4%). Rules that use a combination of clinical and laboratory testing had better performance compared to rules and guidelines using only clinical and or laboratory elements. CONCLUSIONS: Currently applied guidelines for managing children with febrile illness have insufficient diagnostic accuracy in detecting children with SBI. Revised clinical algorithms including simple point-of-care tests with improved accuracy for detecting SBI targeting in tropical resource-poor settings are needed. They should undergo careful external validation against clinical outcome before implementation, given the inherent limitations of gold standards for SBI.


Assuntos
Infecções Bacterianas/diagnóstico , Febre/diagnóstico , Técnicas Microbiológicas/normas , Testes Imediatos/normas , Guias de Prática Clínica como Assunto , Idade de Início , Algoritmos , Infecções Bacterianas/epidemiologia , Infecções Bacterianas/microbiologia , Criança , Pré-Escolar , Feminino , Febre/microbiologia , Humanos , Lactente , Masculino , Técnicas Microbiológicas/métodos , Técnicas Microbiológicas/estatística & dados numéricos , Testes Imediatos/estatística & dados numéricos , Guias de Prática Clínica como Assunto/normas , Valor Preditivo dos Testes , Prognóstico , Reprodutibilidade dos Testes , Estudos Retrospectivos , Sensibilidade e Especificidade , Tanzânia/epidemiologia
11.
Plant Dis ; 103(12): 3142-3149, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31560617

RESUMO

Trunk canker disease caused by Botryosphaeria dothidea with a prolonged latent infection phase poses a serious threat to Chinese hickory production. To further understand the epidemiological characteristics and develop reasonable management techniques, a quantitative loop-mediated isothermal amplification (q-LAMP) assay was developed to quantitatively monitor B. dothidea in hickory plants, water, and air samples. Specific primers were designed based on the different sites of the ß-tubulin sequence between B. dothidea and other fungi commonly found on Chinese hickory. At the optimum reaction temperature of 65.9°C, this loop-mediated isothermal amplification (LAMP) assay can specifically distinguish B. dothidea from other tested fungi. The limit of detection of LAMP assays for B. dothidea was 0.001 ng/µl of pure genomic DNA and 10 spores per 1 ml of water. The q-LAMP assay enables rapid detection of B. dothidea within 60 min in hickory trunk, water in hickory forests, and spores captured on tapes. These results provide a powerful and convenient tool for monitoring B. dothidea, which could be applied widely in epidemiology, forecast, and management of tree canker disease.


Assuntos
Ascomicetos , Carya , Técnicas Microbiológicas , Técnicas de Amplificação de Ácido Nucleico , Microbiologia do Ar , Ascomicetos/genética , Carya/microbiologia , Técnicas Microbiológicas/métodos , Microbiologia da Água
12.
Autops. Case Rep ; 9(3): e2019103, July-Sept. 2019. ilus, tab
Artigo em Inglês | LILACS | ID: biblio-1016864

RESUMO

The effective value of microbiological post-mortem examinations stands as fundamental in forensic cases involving microbiology. We ran these analyses on five victims, who suddenly died after showing persistent fever. The examinations were conducted between 48 hours and 10 days after death, and adrenal gland apoplexy was detected in all the cases. Microbiological examinations identified Neisseria meningitidis, which was accountable for Waterhouse­Friderichsen syndrome. Diplococci were isolated from three cadavers that underwent forensic dissection between 2 and 3 days after death. The remaining two cadavers showed polymicrobial contamination, and a polymerase chain reaction technique was necessary to identify the pathogen. We assumed that the microbial overlap could lead to diagnostic mistakes and conceal the identification of the lethal pathogen. Therefore, we suggest using molecular techniques for a postmortem interval (PMI) longer than 72 hours. Classical microbiological examination should be performed for PMI within 72 hours.


Assuntos
Humanos , Autopsia/métodos , Síndrome de Waterhouse-Friderichsen/patologia , Técnicas Microbiológicas , Evolução Fatal , Neisseria meningitidis
14.
Eur J Clin Microbiol Infect Dis ; 38(12): 2235-2241, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31396831

RESUMO

Antibiotic stewardship programmes (ASP) are essential to tackle antibiotic resistance. Clinical microbiologists (CMs) play a key role in these programmes; however, few studies describe their actual involvement. Our objective was to explore CMs' involvement in French hospital ASP. In 2018, we conducted a survey among CMs working in large public French hospitals (600 acute care beds or more). The questionnaire focused on the following topics: microbiology department's characteristics, hospital ASP, and CMs' involvement in this programme, including their use of rapid diagnostic tests (RDT). Fifty/74 CMs answered (response rate 68%), with 68% working in a teaching hospital. CMs were leading the ASP in 6% of cases, and 57% of hospitals had a multidisciplinary antibiotic stewardship team. Most microbiology departments (92%) were using specific PCR, processed 24/7 in 74% of hospitals. More than half (58%) were using syndromic panel-based testing, 94% mass spectrometry, and 96% immunochromatographic/colorimetric RDT. Blood cultures were processed 24/7 in 44% of hospitals. CMs were involved in this. Finally, 42% of CMs wished to be more involved in their hospital's ASP, the most frequently reported barrier being lack of time (36%). CMs should be more involved in ASP. RDT are widely used, but not implemented in an optimal way.


Assuntos
Gestão de Antimicrobianos/organização & administração , Pessoal de Laboratório Médico/estatística & dados numéricos , Papel Profissional , Gestão de Antimicrobianos/estatística & dados numéricos , França , Hospitais com mais de 500 Leitos , Hospitais Públicos , Humanos , Comunicação Interdisciplinar , Laboratórios Hospitalares/estatística & dados numéricos , Pessoal de Laboratório Médico/psicologia , Técnicas Microbiológicas , Microbiologia/organização & administração , Microbiologia/estatística & dados numéricos , Papel Profissional/psicologia , Kit de Reagentes para Diagnóstico , Inquéritos e Questionários
15.
J Drugs Dermatol ; 18(8): 798-802, 2019 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-31424710

RESUMO

Cutaneous fungal infections account for millions of office visits per year, yet their varied presentations often lead to misdiagnosis. If dermatology clinics are Clinical Laboratory Improvement Amendment (CLIA) certified, direct microscopy with potassium hydroxide or other stains can be used to inexpensively and rapidly diagnose fungal infections. In this survey, we examined dermatologists' perceptions of fungal preparations and CLIA certification to identify barriers that prevent the use of these bedside diagnostics. The response rate was 13% (n=308, based on the number of emails opened). When a cutaneous fungal infection is suspected, 20.94% rarely/never and 19.86% sometimes perform fungal preparations, often because they think clinical diagnosis is adequate or that preparations take too long. 21.32% reported not having CLIA certification, most frequently because the process requires too much work, or they do not know how to apply. Of providers with CLIA certification, over 25% thought it was difficult to obtain. Our results demonstrate that numerous barriers prevent the common use of fungal preparations, including the perception that clinical diagnosis is sufficient and the lack of required CLIA certification. These barriers emphasize the need for additional education about cutaneous fungal infections and use of bedside diagnostics. Additionally, policy-based interventions are necessary to ease the process of CLIA certification.


Assuntos
Dermatomicoses/diagnóstico , Fungos/isolamento & purificação , Indicadores e Reagentes/química , Adulto , Idoso , Dermatologistas/estatística & dados numéricos , Dermatologia/métodos , Dermatologia/estatística & dados numéricos , Dermatomicoses/microbiologia , Dermatomicoses/patologia , Diagnóstico Diferencial , Feminino , Humanos , Hidróxidos/química , Masculino , Técnicas Microbiológicas/métodos , Técnicas Microbiológicas/estatística & dados numéricos , Microscopia , Pessoa de Meia-Idade , Visita a Consultório Médico/estatística & dados numéricos , Compostos de Potássio/química , Padrões de Prática Médica/estatística & dados numéricos , Pele/microbiologia , Pele/patologia , Inquéritos e Questionários/estatística & dados numéricos
16.
Future Microbiol ; 14: 1011-1012, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31469007

RESUMO

In this exclusive interview, Maurizio Sanguinetti discusses current issues with Candida fungal infection diagnoses, in light of its rising resistance to antifungal drugs. This interview was conducted by Ellen Colvin, Editor of Future Microbiology. Maurizio Sanguinetti, MD, is full Professor of Microbiology at the Università Cattolica del Sacro Cuore of Rome, Italy, and Director of the Institute of Microbiology and Chief of the Department of Laboratory Sciences and Infectious Diseases Sciences at the Fondazione Policlinico Agostino Gemelli IRCCS of Rome, Italy. For several years, the research activity of Maurizio Sanguinetti has mainly focused on the development of molecular methods for the rapid diagnosis of bacterial, mycobacterial and fungal infections; the elucidation of virulence and antimicrobial resistance mechanisms in clinically relevant bacterial and fungal pathogens; the characterization of the human microbiota in relationship to infectious and noninfectious diseases and implementation of new diagnostic strategies for the personalized care of patients with infectious diseases.


Assuntos
Antifúngicos/uso terapêutico , Candida/isolamento & purificação , Candidíase/diagnóstico , Candidíase/tratamento farmacológico , Testes Diagnósticos de Rotina/métodos , Gerenciamento Clínico , Técnicas Microbiológicas/métodos , Antifúngicos/farmacologia , Candida/efeitos dos fármacos , Farmacorresistência Fúngica , História do Século XX , História do Século XXI , Humanos , Itália
18.
Arch. bronconeumol. (Ed. impr.) ; 55(8): 421-426, ago. 2019. tab, graf
Artigo em Inglês | IBECS | ID: ibc-186099

RESUMO

Tuberculosis resistance diagnostics have vastly improved in recent years thanks to the development of standardised phenotypic and molecular testing methods. However, these methods are either slow or limited in the number of resistant genotypes they can detect. With the advent of next-generation sequencing (NGS) we can sidestep all those problems, as we can sequence whole tuberculosis genomes at increasingly smaller costs and requiring less and less DNA. In this review, we explain how accumulated knowledge in the field has allowed us to go from phenotypic testing to molecular methods to Whole Genome Sequencing (WGS) for resistance diagnostics. We compare current diagnostic methods with WGS as to their efficacy in detecting resistant cases, and show how forthcoming advances in NGS technologies will be crucial in widespread implementation of WGS as a diagnostic tool


El diagnóstico de la tuberculosis resistente ha mejorado ampliamente en los últimos años gracias al desarrollo de pruebas estandarizadas de diagnóstico tanto fenotípicas como moleculares. Sin embargo, estas pruebas son o bien lentas o limitadas en el número de genotipos resistentes que son capaces de detectar. Con el auge de las nuevas tecnologías de secuenciación masiva podemos evitar esos problemas secuenciando el genoma completo cada vez a un coste más bajo y requiriendo cantidades menores de ADN. En esta revisión, explicamos cómo se ha podido progresar desde las pruebas fenotípicas a los métodos moleculares hasta la secuenciación del genoma completo para el diagnóstico de resistencias gracias a sucesivos descubrimientos en el campo. Comparamos la eficacia de la secuenciación del genoma completo para detectar casos resistentes con respecto a la de los métodos diagnósticos actuales, y mostramos cómo los avances futuros en esta tecnología serán cruciales para la implementación generalizada de esta herramienta diagnóstica


Assuntos
Humanos , Tuberculose Resistente a Múltiplos Medicamentos/epidemiologia , Tuberculose Resistente a Múltiplos Medicamentos/diagnóstico , Técnicas Microbiológicas/métodos , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológico , Tuberculose Pulmonar/tratamento farmacológico , Espanha/epidemiologia , Antituberculosos/uso terapêutico
19.
Biosci Biotechnol Biochem ; 83(11): 2163-2171, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31272289

RESUMO

Motile bacteria often exhibit chemotaxis toward favorable compounds. However, the diversity of bacteria that are attracted to a given substance is largely unknown. This study aimed to reveal the diversity of bacteria with natural chemotaxis towards methanol. We tried to enrich environmental chemotactic bacteria using a glass capillary that is half-filled with methanol solidified with agarose as a trap ("chemotaxis fishing"). The pilot experiment using methanol-chemotactic Methylobacterium aquaticum strain 22A enriched the cells by 46-fold. The method was then applied to bacterial suspensions from paddy water and plants. Depending on the isolation sources and the methods of motility induction, methylotrophic bacteria were enriched 1.2-330-fold. The fished isolates belong to 32 species in 18 genera, mainly containing Acinetobacter, Methylobacterium and Pseudomonas species. Our chemotaxis fishing unveiled a part of diversity of the bacteria with natural chemotaxis towards methanol.


Assuntos
Bactérias/citologia , Bactérias/efeitos dos fármacos , Quimiotaxia/efeitos dos fármacos , Metanol/farmacologia , Técnicas Microbiológicas/métodos , Plantas/microbiologia
20.
Foot Ankle Int ; 40(1_suppl): 33S-38S, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31322940

RESUMO

RECOMMENDATION: Transfer of synovial aspirate in blood culture bottles, obtaining deep biopsy of tissues and bone, obtaining multiple samples, increasing incubation period of cultures, and the use of molecular techniques for culture negative cases are some of the strategies that can help improve the ability to isolate the causative organism(s) in infections of foot and ankle. LEVEL OF EVIDENCE: Moderate. DELEGATE VOTE: Agree: 100%, Disagree: 0%, Abstain: 0% (Unanimous, Strongest Consensus).


Assuntos
Tornozelo , Doenças Ósseas Infecciosas/microbiologia , , Técnicas Microbiológicas , Infecções Relacionadas à Prótese/microbiologia , Infecções dos Tecidos Moles/microbiologia , Humanos
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