Avaliação da suscetibilidade antimicrobiana de bactérias anaeróbias facultativas isoladas de canais radiculares de dentes com insucesso endodôntico frente aos antibióticos de uso sistêmico
Evaluation of antimicrobial susceptibility of facultative anaerobic bacteria isolated in root-filled teeth with persistent infection front to use of systemic antibiotics
Santi, Bárbara Trindade Di; Ribeiro, Marlos Barbosa; Endo, Marcos Sergio; Gomes, Brenda Paula Figueiredo de Almeida
Resumo
Introdução: Bactérias associadas ao insucesso do tratamento endodôntico são capazes de adquirir e expressar resistência aos agentes antimicrobianos comumente empregados para tratar infecções, o que torna necessário, em determinadas situações, a realização de testes laboratoriais para detectar a resistência ou a suscetibilidade antimicrobiana desses micro-organismos. Objetivo: avaliar a suscetibilidade antimicrobiana das cepas de Enterococcus faecalis, Enterococcus faecium, Actinomyces viscosus e Staphylococcus aureus isoladas de canais radiculares de dentes com insucesso endodôntico. Material e método: Cepas clínicas de Enterococcus faecalis (n=3), Enterococcus faecium (n=3), Actinomyces viscosus (n=3) e Staphylococcus aureus (n=3), coletadas in vivo de canais radiculares com insucesso endodôntico, foram testadas quanto à suscetibilidade antimicrobiana por meio do método E-test em duplicata, utilizando os antibióticos: Amoxicilina (AC), Rifampicina (RI), Moxifloxacina (MX), Vancomicina (VA), Tetraciclina (TC), Ciprofloxacina (CI), Cloranfenicol (CL), Benzilpenicilina (PG), Amoxicilina + ácido clavulânico (XL), Doxiciclina (DC), Eritromicina (EM) e Azitromicina (AZ). Resultado: Todas as cepas clínicas testadas foram suscetíveis aos antibióticos AC, XL, PG, DC, MX, TC e VA. Todos os isolados das espécies de S. aureus foram suscetíveis aos 12 antibióticos testados. As cepas de E. faecalis, E. faecium e A. viscosus mostraram padrão de suscetibilidade intermediário contra EM. Algumas cepas de E. faecalis e E. faecium foram resistentes a AZ e RI. Conclusão: As cepas clínicas isoladas dos canais radiculares de dentes com insucesso endodôntico mostraram perfis diferentes de suscetibilidade antimicrobiana e nenhum isolado de E. faecalis e E. faecium apresentou-se suscetível a AZ e EM.
Palavras-chave
Abstract
Introduction: Bacteria associated with failure endodontic treatment are capable of acquiring and expressing resistance against antimicrobial agents usually used to treat infections, which makes necessary, in some cases, laboratory tests in order to detect the resistance or antimicrobial susceptibility of these microorganisms. Objective: to evaluate the antimicrobial susceptibility of Enterococcus faecalis, Enterococcus faecium, Actinomyces viscosus and Staphylococcus aureus strains isolated from root canals of teeth with failure endodontic treatment. Material and method: Enterococcus faecalis (n=3), Enterococcus faecium (n=3), Actinomyces viscosus (n=3) and Staphylococcus aureus (n=3) clinical strains collected in vivo from root-filled canals with failure endodontic treatment thad been their antimicrobial susceptibility tested by the E-test method in duplicate using the antibiotics: Amoxicillin (AC), Rifampicin (RI), Moxifloxacin (MX), Vancomycin (VA), Tetracycline (TC), Ciprofloxacin (CI), Chloranphenicol (CL), Benzilpenicillin (PG), Amoxicillin + clavulanic acid (XL), Doxycycline (DC), Erythromycin (EM) e Azithromycin (AZ). Result: all the clinical strains tested were susceptible to AC, XL, PG, DC, MX, TC e VA. All the isolated S. aureus strains were susceptible to the 12 tested antibiotics. E. faecalis, E. faecium and A. viscosus strains showed intermediary susceptibility pattern against EM. Some E. faecalis and E. faecium strains were resistant against AZ and RI. Conclusion: clinical strains isolated from radicular canals of teeth with failure endodontic treatment showed different antimicrobial susceptibility profiles, and none of E. faecalis or E. faecium strains appeared to be susceptible to AZ or EM.
Keywords
References
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