Results: 114

Detection of virulence and β-lactamase encoding genes in Enterobacter aerogenes and Enterobacter cloacae clinical isolates from Brazil

Braz. j. microbiol; 49 (supl.1), 2018
ABSTRACT Enterobacter cloacae and E. aerogenes have been increasingly reported as important opportunistic pathogens. In this study, a high prevalence of multi-drug resistant isolates from Brazil, harboring several β-lactamase encoding genes was found. Several virulence genes were observed in E. aero...

Caracterización de cepas de Campylobacter jejuni obtenidas desde carne de pollo y heces de aves de corral de la zona central de Chile

Rev. méd. Chile; 145 (12), 2017
Background Campylobacter jejuni is one of the main causal agents of food borne diseases. Infections with this pathogen are mainly caused by chicken meat consumption. Aim To characterize antibiotic resistance and virulence factors in C. jejuni strains obtained from chicken meat and poultry feces in Centr...

Susceptibilidade de duas linhagens comerciais de frango de corte no desenvolvimento de dermatite necrótica e possível relação dos genes iss e iutA de Escherichia coli com a reprodução experimental da doença

Pesqui. vet. bras; 37 (12), 2017
Celulite aviária é uma enfermidade de grande importância para a avicultura mundial, sendo relacionada principalmente à Escherichia coli (E. coli). Neste estudo foi comparada a susceptibilidade de duas linhagens de aves no desenvolvimento da celulite diante do desafio com diferentes concentrações de...

Next-generation sequencing virulome analysis of a Yersinia enterocolitica subsp. palearctica bioserotype 4/O: 3 ST18 isolated from human blood in Brazil

Braz. j. infect. dis; 21 (5), 2017
Abstract Yersinia enterocolitica is a widespread Gram-negative bacterium that causes gastrointestinal disease and other clinical manifestations in humans. Potentially pathogenic Y. enterocolitica has been isolated in Brazil, from human, environmental, food, and animal sources. Herein we report a genome s...

Community-acquired methicillin-resistant Staphylococcus aureus carrying SCCmec type IV and V isolated from healthy children attending public daycares in northeastern Brazil

Braz. j. infect. dis; 21 (4), 2017
Abstract Nasal colonization with methicillin-resistant Staphylococcus aureus (MRSA) have increasingly been reported in healthy communities. This study aimed to assess the rate of S. aureus in general and MRSA in particular from nasal secretion of children in daycare centers in Vitória da Conquista, Braz...

Molecular epidemiology of Streptococcus agalactiae isolated from mastitis in Brazilian dairy herds

Braz. j. microbiol; 48 (3), 2017
Abstract Streptococcus agalactiae is one of the most common pathogens leading to mastitis in dairy herds worldwide; consequently, the pathogen causes major economic losses for affected farmers. In this study, multilocus sequence typing (MLST), genotypic capsular typing by multiplex polymerase chain react...

Correlation between virulence markers of Helicobacter pylori in the oral cavity and gastric biopsies

Arq. gastroenterol; 54 (3), 2017
ABSTRACT BACKGROUND: The clinical outcome of Helicobacter pylori infection has been associated with virulence factors. The presence of these factors is useful as molecular markers in the identification of the high risk for developing severe gastric pathologies. OBJECTIVE: To correlate the presence of v...

Generation of dimeric single-chain antibodies neutralizing the cytolytic activity of vaginolysin

Background: Gardnerella vaginalis is a bacterial vaginosis (BV)-associated vaginal bacterium that produces the toxin vaginolysin (VLY). VLY is a pore-forming toxin that is suggested to be the main virulence factor of G. vaginalis. The high recurrence rate of BV and the emergence of antibiotic-resistant b...

Virulence genes and genetic relationship of L. monocytogenes isolated from human and food sources in Brazil

Braz. j. infect. dis; 21 (3), 2017
ABSTRACT The herein presented assay provided a bacteriological and molecular characterization of 100 samples of L. monocytogenes isolated from human (43) and food (57) sources, from several regions of Brazil, and collected between 1975 and 2013. Antigenic characterization defined 49% of serotype 4b sampl...

Carbapenem-resistant Pseudomonas aeruginosa: association with virulence genes and biofilm formation

Braz. j. microbiol; 48 (2), 2017
Abstract Pseudomonas aeruginosa is an opportunistic pathogen that causes frequently nosocomial infections, currently becoming more difficult to treat due to the various resistance mechanisms and different virulence factors. The purpose of this study was to determine the risk factors independently associa...