Virulence Microbiology
Mostrando 1-12 de 38 artigos, teses e dissertações.
-
1. Secular trends in Klebsiella pneumoniae isolated in a tertiary-care hospital: increasing prevalence and accelerated decline in antimicrobial susceptibility
Abstract: INTRODUCTION Klebsiella pneumoniae has become an increasingly important etiologic agent of nosocomial infections in recent years. This is mainly due to the expression of virulence factors and development of resistance to several antimicrobial drugs. METHODS This retrospective study examines data obtained from the microbiology laboratory of a Bra
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-04
-
2. Salmonella spp na cadeia de produção de carne bovina de exportação: ocorrência, perfil de susceptibilidade antimicrobiana, genes de virulência e perfil de macrorrestrição do PFGE / Salmonella spp in export beef production chain: occurrence, antimicrobial susceptibility, virulence genes and PFGE macrorestriction profile
Beef is exposed to contamination at all stages of the production chain, particularly in operations where it is more manipulated and when Good Hygiene Practices are not properly followed. The most relevant pathogen in bovine meat is Salmonella spp, the major causative agent of foodborne diseases in the world. Several studies have shown that Salmonella spp can
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/05/2011
-
3. Candida não-albicans : avaliação de fatores de virulência e perfil no estudo epidemiológico de candidúria
Leveduras do gênero Candida estão entre os principais patógenos causadores de infecções nosocomiais em todo o mundo. Desta forma, este trabalho teve como objetivo estabelecer o perfil epidemiológico da candidúria no HU de Londrina/PR entre os anos de 2006 e 2007, classificar a extensão da candidúria em diferentes níveis e identificar fatores de ris
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
-
4. Estudo da virulência, adesão e características fenotípicas de isolados do complexo Sporothrix / Study of the virulence, adhesion and prenotype characteristics of Sporothrix
A esporotricose é uma doença micótica, infecciosa e crônica, que envolve o tecido cutâneo e subcutâneo, e que pode afetar seres humanos e animais. Esta micose sempre foi atribuída a um único patógeno, o Sporothrix schenckii, um fungo termodimórfico, que cresce como levedura a 37 C e como micélio à temperatura ambiente. No entanto, nos últimos an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
-
5. Evaluation of phenotypic traits of cariogenicity of Strptococcus Mutans genotypes isolated from dental biofilm / Avaliação de caracteristicas fenotipicas de cariogenicidade de genotipos de Strptococcus Mutans isolados de biofilme dental
Mutans streptococci, mainly Streptococcus mutans, are considered as the main microorganisms related to dental caries. These microorganisms are present in oral cavity as distinct genotypes, which may show distinct phenotypic traits. In this context, it was evaluated the S. mutans genotypic diversity in dental biofilm formed in vivo and in situ during 3 days u
Publicado em: 2010
-
6. Estudo comparativo de fatores de virulência em isolados clínicos de Pseudomonas aeruginosa produtores e não produtores de metalo- ß-lactamase SPM-1
The invasion abilities, colonization and tissue damage presented by P. aeruginosa are due to the multiples virulence factors produced by the microorganism during the pathogenesis. Clinical isolates of SPM-1 metallo-β-lactamase Pseudomonas aeruginosa (SPM-1 MβL) from nosocomial infections present high rates morbidity and mortality and represent epid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2009
-
7. Estudo da variabilidade genética e dos fatores de virulência de isolados de Ureaplasma diversum. / Study of genetic variability and virulence factors of Ureaplasma diversum isolates.
The aim of the present study was the study of genetic variability and virulence factors of U. diversum clinical isolates. The strains were submitted to sequencing for 16S rRNA and urease genes. Moreover, the strains were analyzed to the virulence factors: capsule, phospholipase C, IgA protease and adhesion and invasion into Hep-2 cells. The sequencing of par
Publicado em: 2009
-
8. Ecology, virulence factors and diversity of Escherichia coli isolated from ballast water, ports areas and bivalves samples in Brazil. / Ecologia, fatores associados à virulência e diversidade de Escherichia coli isolados de amostras de água de lastro, água de regiões portuárias e moluscos bivalves no Brasil.
Escherichia coli was isolated from ballast water, port areas water and bivalves samples. 49.6% (164/331) had multiple antibiotics resistant varied from 2 to 8 antibiotics. From seven virulence associated factors investigated: heat stable toxin (ST), heat labile toxin (LT), aggregative adhesion (EAEC), invasion factor (INV), Shiga-like I toxin (STx-1), Shiga-
Publicado em: 2009
-
9. Caracterização fenotípica e molecular de fatores de virulência de Enterococcus faecium de origem hospitalar
Enterococci are Gram-positive cocci commonly found in the gastrointestinal tract of humans and animals as well as in soil, water and food. However, they are now among the leading causes of nosocomial infections. Vancomycin-resistant enterococci (VRE) were first identified in the late 1980s in a few European countries. The genes that encode the six types of a
Publicado em: 2009
-
10. Identificação dos microorganismos presentes na saliva, na coroa dental e no canal radicular de dentes indicados ao retratamento endodontico e analise da suscetibilidade antimicrobiana, dos fatores de virulencia e da diversidade genetica dos Enterococcus faecalis isolados / Identification of microorganism present in saliva, crown and root canal of endodontically treated teeth and analysis of antimicrobial susceptibility, virulence factors and diversity of clonal types of Enterococcus faecalis isolated
The aims of this study were: (a) to identify Enterococcus spp., Staphylococcus spp., Candida spp. and enterobacteria in saliva of patients with failure of the endodonticallytreated teeth, (b) to investigate the microbiota in the restorative material and within root canals of the same subjects, (c) to determine the antimicrobial susceptibility of E. faecalis
Publicado em: 2009
-
11. Aggregative adherence pattern and biofilm formation in typical and atypical enteroaggregative Escherichia coli: role of the Shf protein. / Padrão de adesão agregativa e formação de biofilme em Escherichia coli enteroagregativa típica e atípica: papel da proteína Shf.
Enteroaggregative Escherichia coli (EAEC) is characterized by the expression of the aggregative adherence (AA) pattern to HEp-2 cells. The classification of EAEC in typical and atypical is based on the presence or absence of aggR, respectively. The shf gene encodes a protein with similarity to IcaB, associated with biofilm formation. The objectives of this s
Publicado em: 2009
-
12. Estudo epidemiólogico-molecular e de fatores de virulência de Staphylococcus aureus associados à mastite bovina em propriedades de exploração leiteira dos Estados de São Paulo e Pernambuco. / Molecular epidemiology and virulence factors of Staphylococcus aureus associated to bovine mastitis in dairy herds from São Paulo and Pernambuco state.
A total of 107 S. aureus isolated from bovine milk, udder skin, milkers and milking machine, from São Paulo and Pernambuco herds was typed by molecular techniques. PCR-RFLP coa gene and PCR spa gene distinguished six amplicons. All strains amplified coa, spa, icaA genes and, 69% produced in vitro glucose-induced biofilm. PFGE identified 31 pulsotypes, 12 li
Publicado em: 2009