725 research outputs found
Flexible programmable networking: A reflective, component-based approach
The need for programmability and adaptability in networking systems is becoming increasingly important. More specifically, the challenge is in the ability to add services rapidly, and be able to deploy, configure and reconfigure them as easily as possible. Such demand is creating a considerable shift in the way networks are expected to operate in the future. This is the main aim of programmable networking research community, and in our project we are investigating a component-based approach to the structuring of programmable networking software. Our intention is to apply the notion of components, component frameworks and reflection ubiquitously, thus accommodating all the different elements that comprise a programmable networking system
Sorogrupos e genes de virulĂŞncia em Escherichia coli isoladas de psitacĂdeos
Escherichia coli isolates from 24 sick psittacine birds were serogrouped and investigated for the presence of genes encoding the following virulence factors: attaching and effacing (eae), enteropathogenic E. coli EAF plasmid (EAF), pili associated with pyelonephritis (pap), S fimbriae (sfa), afimbrial adhesin (afa), capsule K1 (neu), curli (crl, csgA), temperature-sensitive hemagglutinin (tsh), enteroaggregative heat-stable enterotoxin-1 (astA), heat-stable enterotoxin -1 heat labile (LT) and heat stable (STa and STb) enterotoxins, Shiga-like toxins (stx1 and stx2), cytotoxic necrotizing factor 1 (cnf1), haemolysin (hly), aerobactin production (iuc) and serum resistance (iss). The results showed that the isolates belonged to 12 serogroups: O7; O15; O21; O23; O54; O64; O76; O84; O88; O128; O152 and O166. The virulence genes found were: crl in all isolates, pap in 10 isolates, iss in seven isolates, csgA in five isolates, iuc and tsh in three isolates and eae in two isolates. The combination of virulence genes revealed 11 different genotypic patterns. All strains were negative for genes encoding for EAF, EAEC, K1, sfa, afa, hly, cnf, LT, STa, STb, stx1 and stx2. Our findings showed that some E. coli isolated from psittacine birds present the same virulence factors as avian pathogenic E. coli (APEC), uropathogenic E. coli (UPEC) and Enteropathogenic E. coli (EPEC) pathotypes.Amostras de Escherichia coli isoladas de 24 psitacĂdeos doentes foram sorogrupadas e investigadas para a presença de genes que codificam os seguintes fatores de virulĂŞncia: attaching e effacing (eae), plasmĂdeo EAF (EAF), pili associado Ă pielonefrite (pap), fĂmbria S (sfa), adesina afimbrial (afa), cápsula K1 (neu), curli (crl, csgA), hemaglutinina termosensĂvel (tsh), enterotoxina termo-estável 1 de E. coli enteroagregativa (astA), toxina termolábil (LT) e toxina termoestável (STa e STb), Shiga-like toxinas (stx1 e stx2), fator citotĂłxico necrotizante 1 (cnf1), hemolisina (hly), produção de aerobactina (iuc) e resistĂŞncia sĂ©rica (iss). Os resultados mostraram que os isolados pertenciam a 12 sorogrupos: O7; O15; O21; O23; O54; O64; O76; O84; O88; O128; O152 e O166. Os genes de virulĂŞncia encontrados foram: crl em todos os isolados, pap em 10 isolados, iss em sete isolados, csgA em cinco isolados, iuc e tsh em trĂŞs isolados e eae em dois isolados. A combinação dos genes de virulĂŞncia revelou 11 perfis genotĂpicos distintos. Todas as amostras foram negativas para os genes que codificam EAF, EAEC, K1, sfa, afa, hly, cnf, LT, STa, STb, stx1 e stx2. Estes resultados demonstraram que algumas amostras de E. coli isoladas de psitacĂdeos apresentam os mesmos fatores de virulĂŞncia presentes nos patotipos de E. coli patogĂŞnicas para aves (APEC), uropatogĂŞnicas (UPEC) e E. coli enteropatogĂŞnicas (EPEC).916921Fundação de Amparo Ă Pesquisa do Estado de SĂŁo Paulo (FAPESP
IdentificaciĂłn del Ăndice de vulnerabilidad territorial a partir de modelos jerárquicos y heurĂsticos aplicando SOA
Auxiliar de InvestigaciĂłnEn el proyecto se realiza el diseño y desarrollo de 4 servicios web implementando los modelos de toma de decisiĂłn (AHP, AHP FUZZY, ELECTRE y PROMETHEE), encargados de procesar datos obtenidos en campo en la primera fase del proyecto que se realizĂł a travĂ©s de encuestas, formatos de entrevistas, talleres y metodologĂas de análisis. Los datos se procesaran de acuerdo al modelo de toma de decisiĂłn seleccionado, generando como resultado final un indicador de vulnerabilidad territorial.PregradoIngeniero de Sistema
Correction: Alhamami et al. First emergence of resistance to macrolides and tetracycline identified in Mannheimia haemolytica and Pasteurella multocida isolates from beef feedlots in Australia. Microorganisms 2021, 9, 1322
The authors wish to make the following corrections to this paper..
Emerging Enteropathogenic Escherichia coli Strains?
Escherichia coli strains of nonenteropathogenic serogroups carrying eae but lacking the enteropathogenic E. coli adherence factor plasmid and Shiga toxin DNA probe sequences were isolated from patients (children, adults, and AIDS patients) with and without diarrhea in Brazil. Although diverse in phenotype and genotype, some strains are potentially diarrheagenic
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