Antibacterial and antibiofilm activity of cinnamaldehyde against carbapenem-resistant Acinetobacter baumannii in Egypt: In vitro study

Bibliographic Information
Authors: Mohamed S.H.; Salem D.; Azmy M.; Fam N.S.
Journal: Journal of Applied Pharmaceutical Science
Publisher: Open Science Publishers LLP Inc.
Publication Date: November 2018
Volume / Issue: Volume 8 / Issue 11
Pages: 151–156
ISSN: 22313354
Scopus: View on Scopus
Document Type: Article
Access: All Open Access; Gold Open Access
Authors and Affiliations
Mohamed S.H., Department of Microbiology, National Organization for Drug Control and Research, Giza, Egypt; Salem D., Department of Microbiology, Theodor Bilharz Research Institute (TBRI), Giza, Egypt; Azmy M., Department of Clinical Pathology and Electron Microscopy, Theodor Bilharz Research institute (TBRI), Giza, Egypt; Fam N.S., Department of Microbiology, Theodor Bilharz Research Institute (TBRI), Giza, Egypt
Abstract
Acinetobacter baumannii has emerged as a problematic nosocomial pathogen due to its antibiotic resistance as well as its ability to colonize and cause serious infection among patients. This study aimed to evaluate the ability of A. baumannii to form biofilms as well as to investigate the antibacterial activity of cinnamaldehyde against carbapenemresistant strains of A. baumannii. A total of 23 A. baumannii clinical strains were screened for their ability to form a biofilm using tissue culture plate method. Cinnamaldehyde antibacterial ability was investigated on planktonic cells and its biofilm inhibition ability was tested. Scanning electron microscopy (SEM) was applied to confirm the antibiofilm effect of cinnamaldehyde. Biofilm formers (86.95%) were categorized into strong (17.39%), moderate (52.17%), and weak (17.39%). Cinnamaldehyde showed a strong antimicrobial activity against planktonic cells of A. baumannii at low concentrations. The best antibiofilm activity was achieved at 1/2 minimum inhibitory concentration (MIC) and 1/4 MIC causing inhibition percentages ranging from 49.5% to 71.2% and 18.5% to 29.6%, respectively. Cinnamaldehyde exerted strong antimicrobial and antibiofilm properties indicating their potential therapeutic value that can be used as an option for treating biofilm associated clinical problems caused by A. baumannii. © 2018 Sara H. Mohamed et al.
Keywords
Acinetobacter baumannii; Biofilm; Carbapenemresistant; Cinnamaldehyde; SEM
Citation Information
Scopus Citations: 33
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