Results: 114

Phenotypic and genotypic analysis of biofilm production by Pseudomonas aeruginosa isolates from infection and colonization samples

Abstract INTRODUCTION: Pseudomonas aeruginosa is an opportunistic pathogen associated with healthcare-related infections, affecting mainly patients with underlying diseases and immunosuppression. This microorganism has several virulence mechanisms that favour its pathogenesis, including the production o...

Effect of Cinnamomum verum leaf essential oil on virulence factors of Candida species and determination of the in-vivo toxicity with Galleria mellonella model

Mem. Inst. Oswaldo Cruz; 115 (), 2020
BACKGROUND Essential oils (EO) extracted from Cinnamomum verum has been used as an antimicrobial agents for centuries. The effects of C. verum leaf oil against virulence of microorganisms is not well studied yet. OBJECTIVES This study evaluates the effect of C. verum leaf oil against three virulence f...

Detection of Bacillus anthracis and Bacillus anthracis-like spores in soil from state of Rio de Janeiro, Brazil

Mem. Inst. Oswaldo Cruz; 115 (), 2020
BACKGROUND Bacillus anthracis is the aetiologic agent of anthrax, a re-emerging, septicaemic, haemorrhagic and lethal disease that affects humans, domestic ruminants and wildlife. Plasmids pXO1 and pXO2 are attributes that confer pathogenicity to B. anthracis strains. This bacterium was used as biologica...

In vitro characterization of virulence factors among species of the Candida parapsilosis complex

Abstract INTRODUCTION: Candida parapsilosis complex species differ from each other with regard to their prevalence and virulence. METHODS: The hydrolytic enzyme activity, biofilm production, and adhesion to epithelial cells were analyzed in 87 C. parapsilosis complex strains. RESULTS: Among the stud...

Relationship between antifungal susceptibility profile and virulence factors in Candida albicans isolated from nail specimens

Abstract INTRODUCTION: The aim of this study was to evaluate some virulence factors in Candida albicans isolates from patients with onychomycosis and determine the correlation between these factors and the antifungal resistance profile. METHODS: Seventy species of C. albicans were confirmed using pol...

Phylogenetic Group/Subgroups Distributions, Virulence Factors, and Antimicrobial Susceptibility of Escherichia coli Strains from Urinary Tract Infections in Hatay

Abstract INTRODUCTION: Nosocomial and community acquired urinary tract infections (UTIs) are one of the most encountered infections in the world. METHODS: This study aimed to determine the antibiotic susceptibility, phylogeny, and virulence genes of 153 Escherichia coli strains isolated from UTIs. An...

Rol de los estreptococos del grupo Streptococcus anginosus en infecciones de piel y partes blandas: reporte de 3 casos

Los estreptococos del grupo Streptococcus anginosus (GSA) comprenden uno de los grupos que conforman el grupo viridans de estreptococos y son parte de la microbiota humana habitual de la cavidad oral, del tracto respiratorio superior y del tracto gastrointestinal. Pueden producir colecciones purulentas d...

Staphylococcus aureus: generalidades, mecanismos de patogenicidad y colonización celular

NOVA publ. cient; 17 (32), 2019
Resumen Staphylococcus aureus se caracteriza por ser la principal causa de bacteriemia nosocomial en el mundo, debido al incremento en la resistencia, a los diferentes factores de patogenicidad y virulencia y la expresión de una gran variedad de proteínas las cuales pertenecen a las moléculas de la ma...

Reguladores de la expresión de genes de Mycobacterium tuberculosis: implicaciones en la virulencia y persistencia en la tuberculosis latente
Regulators of Mycobacterium tuberculosis gene expression: implications in virulence and persistence in latent tuberculosis

La tuberculosis pulmonar (TB) es un problema de salud pública a nivel mundial. La Organización Mundial de la Salud estimó para el año 2017 alrededor de 10 millones de personas enfermas y 1,3 millones de muertes. La facultad que posee MTB para modular la respuesta inmune, sobrevivir y persistir bajo e...

Antimicrobial resistance, diarrheagenic and avian pathogenic virulence genes in Escherichia coli from poultry feed and the ingredients

Diarrheagenic (DEC) and avian pathogenic Escherichia coli (APEC) are associated with intestinal and extra-intestinal infections (ExPEC), respectively. We aimed to analyze the antimicrobial susceptibility, gene encoding virulence factors associated to DEC and APEC, and phylogenetic classification in E. co...