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Id: biblio-951821
Autor: Azam, Mudsser; Jan, Arif Tasleem; Kumar, Ashutosh; Siddiqui, Kehkashan; Mondal, Aftab Hossain; Haq, Qazi Mohd. Rizwanul.
Título: Study of pandrug and heavy metal resistance among E. coli from anthropogenically influenced Delhi stretch of river Yamuna
Fonte: Braz. j. microbiol;49(3):471-480, July-Sept. 2018. tab, graf.
Idioma: en.
Projeto: Council of Scientific & Industrial Research.
Resumo: Abstract Escalating burden of antibiotic resistance that has reached new heights present a grave concern to mankind. As the problem is no longer confined to clinics, we hereby report identification of a pandrug resistant Escherichia coli isolate from heavily polluted Delhi stretch of river Yamuna, India. E. coli MRC11 was found sensitive only to tobramycin against 21 antibiotics tested, with minimum inhibitory concentration values >256 µg/mL for amoxicillin, carbenicillin, aztreonam, ceftazidime and cefotaxime. Addition of certain heavy metals at higher concentrations were ineffective in increasing susceptibility of E. coli MRC11 to antibiotics. Withstanding sub-optimal concentration of cefotaxime (10 µg/mL) and mercuric chloride (2 µg/mL), and also resistance to their combinatorial use, indicates better adaptability in heavily polluted environment through clustering and expression of resistance genes. Interestingly, E. coli MRC11 harbours two different variants of blaTEM (blaTEM-116 and blaTEM-1 with and without extended-spectrum activity, respectively), in addition to mer operon (merB, merP and merT) genes. Studies employing conjugation, confirmed localization of blaTEM-116, merP and merT genes on the conjugative plasmid. Understanding potentialities of such isolates will help in determining risk factors attributing pandrug resistance and strengthening strategic development of new and effective antimicrobial agents.
Descritores: Metais Pesados/farmacologia
Farmacorresistência Bacteriana Múltipla
Rios/microbiologia
Escherichia coli/efeitos dos fármacos
Antibacterianos/farmacologia
-Óperon
beta-Lactamases/genética
beta-Lactamases/metabolismo
Testes de Sensibilidade Microbiana
Proteínas de Escherichia coli/genética
Proteínas de Escherichia coli/metabolismo
Escherichia coli/isolamento & purificação
Escherichia coli/enzimologia
Escherichia coli/genética
Índia
Responsável: BR1.1 - BIREME


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Id: biblio-974322
Autor: Pontes, Patricia Silveira de; Coutinho, Selene Dall' Acqua; Iovine, Renata de Oliveira; Cunha, Marcos Paulo Vieira; Knöbl, Terezinha; Carvalho, Vania Maria de.
Título: Survey on pathogenic Escherichia coli and Salmonella spp. in captive cockatiels (Nymphicus hollandicus)
Fonte: Braz. j. microbiol;49(supl.1):76-82, 2018. tab, graf.
Idioma: en.
Resumo: Abstract We surveyed healthy captive cockatiels (Nymphicus hollandicus) for Escherichia coli and Salmonella spp. Cloacal swabs were collected from 94 cockatiels kept in commercial breeders, private residencies and pet shops in the cities of São Paulo/SP and Niterói/RJ (Brazil). Three strains of E. coli from each individual were tested for the presence of ExPEC-, APEC- and DEC-related genes. We evaluated the blaTEM, blaSHV, blaOXA, blaCMY, blaCTX-M, tetA, tetB, aadA, aphA, strAB, sul1, sul2, sul3, qnrA, qnrD, qnrB, qnrS, oqxAB, aac (6)′-Ib-cr, qepA resistance genes and markers for plasmid incompatibility groups. Salmonella spp. was not detected. E. coli was isolated in 10% of the animals (9/94). Four APEC genes (ironN, ompT, iss and hlyF) were detected in two strains (2/27-7%), and iss (1/27-4%) in one isolate. The highest resistance rates were observed with amoxicillin (22/27-82%), ampicillin (21/27-79%), streptomycin (18/27-67%), tetracycline (11/27-41%). Multiresistance was verified in 59% (16/27) of the isolates. We detected strAB, bla TEM, tetA, tetB, aadA, aphaA, sul1, sul2, sul3 resistance genes and plasmid Inc groups in 20 (74%) of the strains. E. coli isolated from these cockatiels are of epidemiological importance, since these pets could transmit pathogenic and multiresistant microorganisms to humans and other animals.
Descritores: Salmonella/isolamento & purificação
Salmonelose Animal/microbiologia
Doenças das Aves/microbiologia
Cacatuas/microbiologia
Escherichia coli/isolamento & purificação
Infecções por Escherichia coli/veterinária
-Plasmídeos/genética
Plasmídeos/metabolismo
Salmonella/classificação
Salmonella/fisiologia
Salmonella/genética
Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Brasil
Farmacorresistência Bacteriana Múltipla
Escherichia coli/classificação
Escherichia coli/efeitos dos fármacos
Escherichia coli/genética
Infecções por Escherichia coli/microbiologia
Antibacterianos/farmacologia
Limites: Animais
Responsável: BR1.1 - BIREME


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Id: biblio-974332
Autor: Cheng, Fangjun; Li, Zhangcheng; Lan, Shimei; Liu, Wei; Li, Xiaoyan; Zhou, Zuoyong; Song, Zhenhui; Wu, Juan; Zhang, Manli; Shan, Wenjie.
Título: Characterization of Klebsiella pneumoniae associated with cattle infections in southwest China using multi-locus sequence typing (MLST), antibiotic resistance and virulence-associated gene profile analysis
Fonte: Braz. j. microbiol;49(supl.1):93-100, 2018. tab, graf.
Idioma: en.
Projeto: Fundamental Research Funds for the Central Universities; . Innovation Project for the Social Undertakings and People's Livelihood Protection in Chongqing; . Frontiers and basic research projects in Chongqing.
Resumo: Abstract Klebsiella pneumoniae is important human and animal pathogen that causes a wide spectrum of infections. In this study, isolates from cattle nasal swabs samples were identified by 16S rRNA, and to evaluate the antimicrobial susceptibility, virulence gene carrying levels, and multilocus sequence typing of K. pneumoniae isolates. 33 isolates of K. pneumoniae were isolated and identified in 213 nasal swabs samples, of which 12 were hypervirulent K. pneumoniae strains. Extended Spectrum Beta-Lactamases genes were found in 93.4% of the strains. Of which, TEM was the most prevalent (93.4%), followed by CTX-M and SHV were 57.6% and 39.4%, respectively. A main mutation pattern of quinoloneresistance-determining region, Thr83-Ieu and Asp87-Asn in gyrA and Ser87-Ile in parC, was detected in 33 K. pneumoniae isolates. All the isolates harbored at least two virulence factor genes, with ureA (97.0%) and wabG (91.0%) exhibiting high carriage rates in 33 K. pneumoniae isolates. MLST revealed 7 sequence types, of which 3 STs (2541, 2581 and 2844) were newly assigned. Using eBURST, ST2844 and ST2541 were assigned to new clonal complex 2844. Our study provides evidence and biological characteristics of K. pneumoniae isolates from cattle upper respiratory tract in Southwest China.
Descritores: Proteínas de Bactérias/genética
Infecções por Klebsiella/veterinária
Doenças dos Bovinos/microbiologia
Farmacorresistência Bacteriana Múltipla
Fatores de Virulência/genética
Klebsiella pneumoniae/isolamento & purificação
Klebsiella pneumoniae/efeitos dos fármacos
Antibacterianos/farmacologia
-Proteínas de Bactérias/metabolismo
Infecções por Klebsiella/microbiologia
China
Fatores de Virulência/metabolismo
Tipagem de Sequências Multilocus
Klebsiella pneumoniae/genética
Klebsiella pneumoniae/metabolismo
Limites: Animais
Bovinos
Responsável: BR1.1 - BIREME


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Id: biblio-839366
Autor: Wang, Jianfeng; Chen, Yan; Wu, Liyan; Chen, Yu; Xu, Liqun.
Título: Draft genome sequence of a multidrug-resistant beta-lactamase OXA-357-producing Acinetobacter pittii ST865 clinical isolate from China
Fonte: Braz. j. microbiol;48(2):196-197, April.-June 2017.
Idioma: en.
Resumo: Abstract Worldwide increasing emergence of carbapenem-resistant Acinetobacter spp. has rendered the limited availability of effective antimicrobial agents and has become a major public health concern. In this study, we report the draft genome sequence of A. pittii TCM156, a multidrug-resistant isolate that harbored the blaOXA-357 gene. The genome sequence was further analyzed by various bioinformatics methods. The genome size was estimated to be 3,807,313 bp with 3508 predicted coding regions and G + C content is 38.7%. These findings have raised awareness of the possible emergence of OXA-type enzyme-producing A. pittii isolate in China.
Descritores: Acinetobacter/genética
beta-Lactamases/metabolismo
Infecções por Acinetobacter/microbiologia
DNA Bacteriano/química
Genoma Bacteriano
Análise de Sequência de DNA
Farmacorresistência Bacteriana Múltipla
-Composição de Bases
Acinetobacter/isolamento & purificação
Acinetobacter/efeitos dos fármacos
Acinetobacter/enzimologia
DNA Bacteriano/genética
China
Responsável: BR1.1 - BIREME


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Id: lil-780828
Autor: Mohamed, Yasmine Fathy; Abou-Shleib, Hamida Moustafa; Khalil, Amal Mohamed; El-Guink, Nadia Mohamed; El-Nakeeb, Moustafa Ahmed.
Título: Membrane permeabilization of colistin toward pan-drug resistant Gram-negative isolates
Fonte: Braz. j. microbiol;47(2):381-388, Apr.-June 2016. tab, graf.
Idioma: en.
Resumo: Abstract Pan-drug resistant Gram-negative bacteria, being resistant to most available antibiotics, represent a huge threat to the medical community. Colistin is considered the last therapeutic option for patients in hospital settings. Thus, we were concerned in this study to demonstrate the membrane permeabilizing activity of colistin focusing on investigating its efficiency toward those pan-drug resistant isolates which represent a critical situation. We determined the killing dynamics of colistin against pan-drug resistant isolates. The permeability alteration was confirmed by different techniques as: leakage, electron microscopy and construction of an artificial membrane model; liposomes. Moreover, selectivity of colistin against microbial cells was also elucidated. Colistin was proved to be rapid bactericidal against pan-drug resistant isolates. It interacts with the outer bacterial membrane leading to deformation of its outline, pore formation, leakage of internal contents, cell lysis and finally death. Furthermore, variations in membrane composition of eukaryotic and microbial cells provide a key for colistin selectivity toward bacterial cells. Colistin selectively alters membrane permeability of pan-drug resistant isolates which leads to cell lysis. Colistin was proved to be an efficient last line treatment for pan-drug resistant infections which are hard to treat.
Descritores: Membrana Celular/metabolismo
Infecções por Bactérias Gram-Negativas/microbiologia
Colistina/metabolismo
Farmacorresistência Bacteriana Múltipla
Bactérias Gram-Negativas/metabolismo
Antibacterianos/metabolismo
-Testes de Sensibilidade Microbiana
Membrana Celular/efeitos dos fármacos
Permeabilidade da Membrana Celular
Infecções por Bactérias Gram-Negativas/tratamento farmacológico
Colistina/farmacologia
Bactérias Gram-Negativas/isolamento & purificação
Bactérias Gram-Negativas/efeitos dos fármacos
Bactérias Gram-Negativas/ultraestrutura
Antibacterianos/farmacologia
Limites: Seres Humanos
Responsável: BR1.1 - BIREME


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Id: biblio-983770
Autor: Berberian, Griselda; Brizuela, Martín; Rosanova, María T; Travaglianti, Mónica; Mastroiani, Alejandra; Reijtman, Vanesa; Fiorili, Graciela; Santa Cruz, Dora; Castro, Graciela.
Título: Infecciones por bacilos Gram-negativos multirresistentes en neonatología / Multidrug resistant Gram-negative infections in neonatology
Fonte: Arch. argent. pediatr;117(1):6-11, feb. 2019. tab.
Idioma: en; es.
Resumo: Introducción. Las infecciones por bacilos Gram-negativos multirresistentes (BGN-MR) constituyen un problema creciente en las unidades de cuidado intensivo neonatal. El objetivo del estudio fue conocer las características epidemiológicas, clínicas, microbiológicas, evolutivas y los factores de riesgo de infección por BGN-MR resistentes a carbapenemes en el Servicio de Neonatología de un hospital de alta complejidad. Población y método. Se realizó un estudio de cohorte retrospectivo en dicho Servicio, donde se incluyeron los pacientes con infección documentada por BGN-MR del 24/4/2013 al 29/4/2015. Resultados. Se incluyeron 21 pacientes. La mediana de edad gestacional y peso de nacimiento fue 35 semanas y 2070 gramos, respectivamente. Dieciocho pacientes (86 %) tuvieron hemocultivos positivos y el aislamiento microbiológico más frecuente fue Acinetobacter baumannii (17 pacientes, 81 %), seguido por Klebsiella pneumoniae productora de carbapenemasa (3 pacientes, 14 %) y Enterobacter cloacae (1 paciente, 5 %). La mediana de edad al momento del diagnóstico fue de 28 días y todos tenían factores de riesgo para la infección, como cirugía, asistencia respiratoria mecánica, nutrición parenteral, catéter central y antibióticos. El tratamiento antibiótico definitivo fue colistina en todos los casos, combinado en el 84 %. Cinco pacientes (24 %) fallecieron por la infección. La prematurez y el peso < 2000 g fueron factores de riesgo estadísticamente significativos asociados a la mortalidad (p = 0,03 y 0,01, respectivamente). Conclusión. Las infecciones por BGN-MR se presentaron en pacientes con factores predisponentes. Acinetobacter baumannii fue el primer agente etiológico. La mortalidad fue elevada y relacionada con prematurez y bajo peso al nacer.

Introduction. Multidrug resistant Gramnegative (MDRGN) infections are an increasing problem in neonatal intensive care units. The objective of this study was to establish the epidemiological, clinical, microbiological, and evolutionary characteristics of carbapenem-resistant MDRGN infections and the risk factors for them at the Division of Neonatology of a tertiary care hospital. Population and method. A retrospective cohort study was done in this Division in patients with a documented MDRGN infection between 4/24/2013 and 4/29/2015. Results. Twenty-one patients were included. Their median gestational age and birth weight were 35 weeks and 2070 g, respectively. Eighteen patients (86 %) had a positive blood culture; the most commonly isolated microorganism was Acinetobacter baumannii (17 patients, 81 %), followed by carbapenemase-producing Klebsiella pneumoniae (3 patients, 14 %) and Enterobacter cloacae (1 patient, 5 %). The median age at diagnosis was 28 days and all patients had risk factors for infection, including surgery, assisted mechanical ventilation, parenteral nutrition, central venous line, and antibiotics. The definite antibiotic therapy included colistin in all cases; in combination, in 84 %. Five patients (24 %) died due to the infection. Prematurity and a birth weight < 2000 g were statistically significant risk factors associated with mortality (p = 0.03 and 0.01, respectively). Conclusion. MDRGN infections were observed in patients with predisposing factors. Acinetobacter baumannii was the main etiologic agent. Mortality was high and related to prematurity and a low birth weight.
Descritores: Infecções por Bactérias Gram-Negativas/metabolismo
Infecções por Bactérias Gram-Negativas/tratamento farmacológico
Infecções por Bactérias Gram-Negativas/epidemiologia
-Epidemiologia Descritiva
Estudos Retrospectivos
Farmacorresistência Bacteriana Múltipla
Bactérias Gram-Negativas/metabolismo
Limites: Seres Humanos
Masculino
Feminino
Recém-Nascido
Tipo de Publ: Estudo Observacional
Responsável: AR94.1 - Centro de Información Pediatrica


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Id: lil-780833
Autor: Tekiner, İsmail Hakkı; Özpınar, Haydar.
Título: Occurrence and characteristics of extended spectrum beta-lactamases-producing Enterobacteriaceae from foods of animal origin
Fonte: Braz. j. microbiol;47(2):444-451, Apr.-June 2016. tab.
Idioma: en.
Resumo: Abstract Presence of extended spectrum beta-lactamases (ESBL) in bacteria is a growing health concern of global significance. The local, regional, national, and international epidemiological studies for extended spectrum beta-lactamases-producing Enterobacteriaceae and their encoding genes in foods are still incomplete. The objective of this study was to determine the occurrence of extended spectrum beta-lactamases-producing Enterobacteriaceae and the characteristics of their encoding genes from a total of 250 samples of various foods of animal-origin (100 raw chicken meat, 100 raw cow milk, and 50 raw cow milk cheese) sold in Turkey. Overall, 55 isolates were positive as extended spectrum beta-lactamases-producing Enterobacteriaceae. The most prevalent extended spectrum beta-lactamases-producing strain were identified as Escherichia coli (80%), followed by Enterobacter cloacae (9.1%), Citrobacter braakii (5.5%), Klebsiella pneumoniae (3.6%), and Citrobacter werkmanii (1.8%) by Vitek® MS. The simultaneous production of extended spectrum beta-lactamases and AmpC was detected in five isolates (9.1%) in E. coli (80%) and E. cloacae (20%). The frequency rates of blaTEM, blaCTX-M, and blaSHV were 96.4%, 53.7%, and 34.5%, respectively. The co-existence of bla -genes was observed in 82% of extended spectrum beta-lactamases producers with a distribution of blaTEM & blaCTX-M (52.7%), blaTEM & blaSHV (20%), blaTEM & blaCTX-M & blaSHV (12.7%), and blaSHV & blaCTX-M (1.8%). The most prevalent variant of blaCTX-M clusters was defined as blaCTX-M-1 (97.2%), followed by blaCTX-M-8 (2.8%). In summary, the analysed foods were found to be posing a health risk for Turkish consumers due to contamination by Enterobacteriaceae with a diversity of extended spectrum beta-lactamases encoding genes.
Descritores: Proteínas de Bactérias/metabolismo
beta-Lactamases/metabolismo
Queijo/microbiologia
Leite/microbiologia
Enterobacteriaceae
Carne/microbiologia
-Proteínas de Bactérias/genética
Turquia
beta-Lactamases/genética
Bovinos
Galinhas
Farmacorresistência Bacteriana Múltipla
Enterobacteriaceae/efeitos dos fármacos
Enterobacteriaceae/enzimologia
Enterobacteriaceae/genética
Microbiologia de Alimentos
Antibacterianos/farmacologia
Responsável: BR1.1 - BIREME


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Id: biblio-1017783
Autor: Ortiz Rosana, Minako Nagai, Martinez Mario, Centurión Maria Gloria, Riveros Marcos, Chamorro Gustavo.
Título: Perfil de resistencia de estafilococo coagulasa negativo aislados de muestras de hemocultivos ene el Laboratorio Central de Salud Pública, periodo 2006-2008 / Negative profile of resistance of estafilococo coagulasa isolated of samples of hemocultures ene the Central Laboratory of Public Health, period 2006-2008.
Fonte: Asunción; s.n; /Set. 2009/. Poster p.
Idioma: es.
Resumo: Estudio observacional descriptivo de carácter retrospectivo, comprendido en el periodo 2006 al 2008 de todo los hemocultivos procesados en el Laboratorio Central de Salud Pública de Paraguay con aislamiento de Estafilococos Coagulasa-Negativos (ECN). El antibiograma se realizó empleando el método de Kirby-Bauer y siguiendo recomendaciones del Clinical and Laboratory Standards Institute (CLSI)
Descritores: Farmacorresistência Bacteriana
Farmacorresistência Bacteriana Múltipla
-Paraguai
Tipo de Publ: Artigo Clássico
Responsável: PY27.2 - Biblioteca
Py27.2; LCSP, 616.075 6


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Id: lil-621520
Autor: Silva Júnior, Moacyr.
Título: Recent changes in Clostridium difficile infection / Recentes mudanças da infecção por Clostridium difficile
Fonte: Einstein (Säo Paulo);10(1):105-119, jan.-mar. 2012. tab.
Idioma: en; pt.
Resumo: Clostridium difficile is the main cause of nosocomial diarrhea. Diarrhea associated with C. difficile has increased incidence, morbidity, and mortality in the last few years. The major related risk factors include use of antibiotics, elderly patients and prolonged hospital stay. Many patients receive combinations of antibiotics or multiple antibiotics, which represents the main risk to develop diarrhea associated to C. difficile or its recurrence. Therefore, interventions to improve antibiotic prescribing, as well as compliance with infection control measures can reduce hospital-acquired C. difficile infections. This review addresses the epidemiological changes in C. difficile disease and its treatment.

Clostridium difficile é a principal causa de diarreia hospitalar. A diarreia por C. difficile aumentou sua incidência e sua morbiletalidade nos últimos anos. Os principais fatores de risco relacionados são uso de antibióticos, idosos e permanência hospitalar prolongada. Muitos pacientes recebem combinação de antibióticos ou múltiplos antibióticos, constituindo-se, assim, o principal fator de risco para o desenvolvimento de infecção ou de recorrência de diarreia associada ao C. difficile. Por isso, intervenções que otimizem a prescrição de antibióticos associado à aderência de medidas de controle de infecção podem reduzir aquisição dessa infecção. Assim, esta revisão aborda a mudança da epidemiologia da infecção por C. difficile e seu tratamento.
Descritores: Infecções por Clostridium/epidemiologia
-Antibacterianos/efeitos adversos
Antibacterianos/uso terapêutico
Brasil/epidemiologia
Infecções por Clostridium/diagnóstico
Infecções por Clostridium/tratamento farmacológico
Infecções por Clostridium/microbiologia
Infecções por Clostridium/fisiopatologia
Clostridium difficile/efeitos dos fármacos
Clostridium difficile/isolamento & purificação
Infecção Hospitalar/epidemiologia
Infecção Hospitalar/microbiologia
Diarreia/epidemiologia
Diarreia/microbiologia
Suscetibilidade a Doenças
Farmacorresistência Bacteriana Múltipla
Enterocolite Pseudomembranosa/epidemiologia
Enterocolite Pseudomembranosa/microbiologia
Imunoterapia
Morbidade/tendências
Probióticos/uso terapêutico
Recidiva
Fatores de Risco
Limites: Seres Humanos
Tipo de Publ: Revisão
Responsável: BR1.1 - BIREME


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Id: lil-777090
Autor: Khosravi, Azar Dokht; Hoveizavi, Hajar; Mohammadian, Ali; Farahani, Abbas; Jenabi, Atefeh.
Título: Genotyping of multidrug-resistant strains of Pseudomonas aeruginosa isolated from burn and wound infections by ERIC-PCR
Fonte: Acta cir. bras;31(3):206-211, Mar. 2016. tab, graf.
Idioma: en.
Projeto: Ahvaz Jundishapur University of Medical Sciences.
Resumo: ABSTRACT PURPOSE: To determine the genetic diversity of MDR P. aeruginosa strains isolated from burn and wound infections in Ahvaz, Iran, by ERIC-PCR. METHODS: From total 99 strains of P. aeruginosa defined as MDR by using drug susceptibility testing, 66 were subjected to ERIC-PCR analysis, comprises 53 strains isolated from burn infection, and 13 randomly selected strains from wound infection with higher resistance to combinations of more numbers of drugs. RESULTS: Eight clusters (I to VIII), and 50 single clones were generated for tested MDR isolates analyzed by ERIC-PCR. The high heterogeneity was observed among the isolates from burn infections including 16 isolates which were categorized in eight clusters and 37 single clones. The isolates in clusters II, III, VI, VIII showed 100% similarity. CONCLUSIONS: The high level of genotypic heterogeneity in P. aeruginosa strains demonstrated no genetic correlation between them. Extremely high drug resistance in isolates from burn, suggests that efficient control measures and proper antibiotic policy should be observed.
Descritores: Pseudomonas aeruginosa/genética
Infecções por Pseudomonas/microbiologia
Infecção dos Ferimentos/microbiologia
Queimaduras/microbiologia
DNA Bacteriano/genética
Farmacorresistência Bacteriana Múltipla/genética
-Pseudomonas aeruginosa/isolamento & purificação
Sequências Repetitivas de Ácido Nucleico/genética
Reação em Cadeia da Polimerase
Genótipo
Limites: Seres Humanos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME



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