Enterotoxigenic and non-enterotoxigenic Bacteroides fragilis from fecal microbiota of children
AUTOR(ES)
Ignacio, Aline, Fernandes, Miriam Rodriguez, Avila-Campos, Mario Julio, Nakano, Viviane
FONTE
Braz. J. Microbiol.
DATA DE PUBLICAÇÃO
27/10/2015
RESUMO
Enterotoxigenic Bacteroides fragilis (ETBF) is an important part of the human and animal intestinal microbiota and is commonly associated with diarrhea. ETBF strains produce an enterotoxin encoded by the bft gene located in the B. fragilis pathogenicity island (BfPAI). Non-enterotoxigenic B. fragilis (NTBF) strains lack the BfPAI and usually show two different genetic patterns, II and III, based on the absence or presence of a BfPAI-flanking region, respectively. The incidence of ETBF and NTBF strains in fecal samples isolated from children without acute diarrhea or any other intestinal disorders was determined. All 84 fecal samples evaluated were B. fragilis-positive by PCR, four of them harbored the bft gene, 27 contained the NTBF pattern III DNA sequence, and 52 were considered to be NTBF pattern II samples. One sample was positive for both ETBF and NTBF pattern III DNA sequences. All 19 B. fragilis strains isolated by the culture method were bft-negative, 9 belonged to pattern III and 10 to pattern II. We present an updated overview of the ETBF and NTBF incidence in the fecal microbiota of children from Sao Paulo City, Brazil.
Documentos Relacionados
- Antibiotic resistance in Enterotoxigenic and non-enterotoxigenic Escherichia coli.
- Hemolytic activity in enterotoxigenic and non-enterotoxigenic strains of Escherichia coli.
- Staphylococcal enterotoxin production in the presence of non-enterotoxigenic staphylococci.
- Hemagglutination activity and colonization factor antigens I and II in enterotoxigenic and non-enterotoxigenic strains of Escherichia coli isolated from humans.
- Isolation of enterotoxigenic Bacteroides fragilis from Bangladeshi children with diarrhea: a controlled study.