Prevalence of Enteropathogens and Virulence Traits in Brazilian Children With and Without Diarrhea.

The use of molecular diagnostics for pathogen detection in epidemiological studies have allowed us to get a wider view of the pathogens associated with diarrhea, but the presence of enteropathogens in asymptomatic individuals has raised several challenges in understanding the etiology of diarrhea, and the use of these platforms in clinical diagnosis as well. To characterize the presence of the most relevant bacterial enteropathogens in diarrheal episodes, we evaluated here the prevalence of diarrheagenic pathotypes, spp., and in stool samples of children with and without diarrhea using real-time quantitative PCR (qPCR).

Genes Encoding Toxin of Clostridium difficile in Children with and without Diarrhea.

The presence of gene 16S rRNA and genes encoding toxin A (tcdA), toxin B (tcdB), and binary toxin (cdtA/cdtB) of Clostridium difficile in stool samples from children with (110) and without (150) diarrhea was determined by using a TaqMan system. Fifty-seven (21.9%) out of 260 stool samples harbored the 16S rRNA gene.

Antimicrobial resistance and prevalence of resistance genes in intestinal Bacteroidales strains.

Objective: This study examined the antimicrobial resistance profile and the prevalence of resistance genes in Bacteroides spp. and Parabacteroides distasonis strains isolated from children's intestinal microbiota.

Methods: The susceptibility of these bacteria to 10 antimicrobials was determined using an agar dilution method.