Antimicrobial susceptibility pattern of oral gram negative anaerobes from Indian subjects.

Autor: Bhat KG; Central Research Laboratory, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Bauxite Road, Belgaum, Karnataka, India. Electronic address: drkgbhat@yahoo.com., Ingalagi P; Central Research Laboratory, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Bauxite Road, Belgaum, Karnataka, India., Patil S; Department of Periodontology, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Bauxite Road, Belgaum, Karnataka, India., Patil S; Central Research Laboratory, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Bauxite Road, Belgaum, Karnataka, India., Pattar G; Central Research Laboratory, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Bauxite Road, Belgaum, Karnataka, India.
Jazyk: angličtina
Zdroj: Anaerobe [Anaerobe] 2021 Aug; Vol. 70, pp. 102367. Date of Electronic Publication: 2021 Apr 17.
DOI: 10.1016/j.anaerobe.2021.102367
Abstrakt: Objectives: There is paucity of information on the antimicrobial susceptibility pattern of oral anaerobic bacteria. In this study, an attempt has been made to evaluate the antimicrobial susceptibility/resistance trend of oral Gram negative bacteria from Indian subjects.
Methods: Minimum inhibitory concentrations (MIC) of 304 isolates against twelve different antibiotics were determined using gradient diffusion MIC strips. The organisms were isolated and identified based on phenotypic characteristics and included Porphyromonas gingivalis, Prevotella species, Tannerella forsythia, Fusobacterium nucleatum, Aggregatibacter actinomycetemcoitans, Eickenella corrodens and Capnocytophaga species. For each antimicrobial agent, MIC 50 and MIC 90 were calculated and expressed.
Results: Resistance to azithromycin, clindamycin, and amoxicillin was observed in most of the anaerobic bacterial species studied. High degree of susceptibility was observed to amoxillin-clavulanic acid, doxycycline and moxifloxacin. A single strain of P. melaninogenica was resistant to moxifloxacin. The susceptibility pattern varied with cephalosporins among species. Ceftriaxone showed highest and cefazolin least efficacy among cephalosporins. All anaerobic bacteria tested were susceptible to metronidazole. Strains of T. forsythia were more resistant to several antibiotics than other anaerobic bacteria. All three species of capnophilic bacteria displayed high degree of resistance to metronidazole and significant resistance to amoxicillin, azithromycin, clindamycin, cefazolin and cefuroxime.
Conclusions: Amoxicillin-clavulanic acid, doxycycline, moxifloxacin and metronidazole appeared to be the most effective drugs against gram negative anaerobic bacteria. However, the MIC 50 and MIC 90 values against metronidazole were on the higher side of the normal indicating a potential for developing resistance.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: