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Antimicrobial resistance and prevalence of resistance genes in intestinal Bacteroidales strains
Nakano, Viviane; Nascimento e Silva, Amanda do; Merino, Victor Rafael Castillo; Wexler, Hannah M; Avila-Campos, Mario Julio.
  • Nakano, Viviane; São Paulo University. Institute of Biomedical Sciences. Department of Microbiology. Anaerobe Laboratory. São Paulo. BR
  • Nascimento e Silva, Amanda do; São Paulo University. Institute of Biomedical Sciences. Department of Microbiology. Anaerobe Laboratory. São Paulo. BR
  • Merino, Victor Rafael Castillo; São Paulo University. Institute of Biomedical Sciences. Department of Microbiology. Anaerobe Laboratory. São Paulo. BR
  • Wexler, Hannah M; Greater Los Angeles Veterans Administration Healthcare Systems. Los Angeles. US
  • Avila-Campos, Mario Julio; São Paulo University. Institute of Biomedical Sciences. Department of Microbiology. Anaerobe Laboratory. São Paulo. BR
Clinics ; 66(4): 543-547, 2011. tab
Artigo em Inglês | LILACS | ID: lil-588901
ABSTRACT

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. β-lactamase activity was assessed by hydrolysis of the chromogenic cephalosporin of 114 Bacteriodales strains isolated from the fecal samples of 39 children, and the presence of resistance genes was tested using a PCR assay.

RESULTS:

All strains were susceptible to imipenem and metronidazole. The following resistance rates were observed amoxicillin (93 percent), amoxicillin/clavulanic acid (47.3 percent), ampicillin (96.4 percent), cephalexin (99 percent), cefoxitin (23 percent), penicillin (99 percent), clindamycin (34.2 percent) and tetracycline (53.5 percent). P-lactamase production was verified in 92 percent of the evaluated strains. The presence of the cfiA, cepA, ermF, tetQ and nim genes was observed in 62.3 percent, 76.3 percent, 27 percent, 79.8 percent and 7.8 percent of the strains, respectively.

CONCLUSIONS:

Our results indicate an increase in the resistance to several antibiotics in intestinal Bacteroides spp. and Parabacteroides distasonis and demonstrate that these microorganisms harbor antimicrobial resistance genes that may be transferred to other susceptible intestinal strains.
Assuntos


Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Bacteroides / Farmacorresistência Bacteriana / Intestinos / Antibacterianos Tipo de estudo: Estudo de prevalência / Fatores de risco Limite: Criança / Humanos Idioma: Inglês Revista: Clinics Assunto da revista: Medicina Ano de publicação: 2011 Tipo de documento: Artigo / Documento de projeto País de afiliação: Brasil / Estados Unidos Instituição/País de afiliação: Greater Los Angeles Veterans Administration Healthcare Systems/US / São Paulo University/BR

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Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Bacteroides / Farmacorresistência Bacteriana / Intestinos / Antibacterianos Tipo de estudo: Estudo de prevalência / Fatores de risco Limite: Criança / Humanos Idioma: Inglês Revista: Clinics Assunto da revista: Medicina Ano de publicação: 2011 Tipo de documento: Artigo / Documento de projeto País de afiliação: Brasil / Estados Unidos Instituição/País de afiliação: Greater Los Angeles Veterans Administration Healthcare Systems/US / São Paulo University/BR