Infection and Drug Resistance (Jul 2023)
Effects of Repeated in-vitro Exposure to Saudi Honey on Bacterial Resistance to Antibiotics and Biofilm Formation
Abstract
Abdu Aldarhami,1 Abdulrahman S Bazaid,2,3 Husam Qanash,2,3 Iqbal Ahmad,4 Fahad H Alshammari,2,3 Abdulrahman M Alshammari,2,3 Abdulrahman H Alshammari,2,3 Fahad M Aljanfawe,3 Bushra Aldamiri,5 Esraa Aldawood,6 Mashail A Alghamdi,7 Naif K Binsaleh,2,3 Nizar H Saeedi,8 Mejdi Snoussi3,9,10 1Department of Medical Microbiology, Qunfudah Faculty of Medicine, Umm Al-Qura University, Al-Qunfudah, 21961, Saudi Arabia; 2Department of Medical Laboratory Science, College of Applied Medical Sciences, University of Ha’il, Hail, 55476, Saudi Arabia; 3Medical and Diagnostic Research Center, University of Ha’il, Hail, 55473, Saudi Arabia; 4Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, India; 5Biochemistry Department, College of Science, King Saud University, Riyadh, 12372, Saudi Arabia; 6Clinical Laboratory Sciences Department, College of Applied Medical Sciences, King Saud University, Riyadh, 12372, Saudi Arabia; 7Biology Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; 8Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk, Saudi Arabia; 9Department of Biology, College of Science, University of Ha’il, Hail, 81451, Saudi Arabia; 10Laboratory of Genetics, Biodiversity and Valorization of Bio-Resources, Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, 5000, TunisiaCorrespondence: Abdulrahman S Bazaid; Husam Qanash, Department of Medical Laboratory Science, College of Applied Medical Sciences, University of Ha’il, Hail, 55476, Saudi Arabia, Tel +966 16 5358200 ext. 1713, Email [email protected]; [email protected]: Although Sumra and Sidr Saudi honey is widely used in traditional medicine due to its potent activity, it is unknown whether its prolonged usage has impact upon bacterial virulence or leading to reduced antibiotic sensitivity. Thus, the study aims to investigate the effect of prolonged (repeated) in-vitro exposure to Saudi honey on the antibiotic susceptibility profiles and biofilm formation of pathogenic bacteria.Methods: Several bacteria, including Staphylococcus aureus, Escherichia coli, and Acinetobacter baumannii, were in-vitro exposed ten times [passaged (P10)]to Sumra and Sider honey individually to introduce adapted bacteria (P10). Antibiotic susceptibility profiles of untreated (P0) and adapted (P10) bacteria were assessed using disc diffusion and microdilution assays. The tendency regarding biofilm formation following in-vitro exposure to honey (P10) was assessed using the Crystal violet staining method.Results: Adapted (P10) bacteria to both Sumra and Sidr honey showed an increased sensitivity to gentamicin, ceftazidime, ampicillin, amoxycillin/clavulanic acid, and ceftriaxone, when compared with the parent strains (P0). In addition, A. baumannii (P10) that was adapted to Sidr honey displayed a 4-fold increase in the minimal inhibitory concentration of the same honey following in-vitro exposure. 3-fold reduction in the tendency toward biofilm formation was observed for the Sumra-adapted (P10) methicillin resistant S. aureus strain, although there was a lower rate of reduction (1.5-fold) in biofilm formation by both the Sumra- and Sidr-adapted A. baumannii (P10) strains.Conclusion: The data highlight the positive impact of prolonged in-vitro exposure to Saudi honey (Sumra and Sider) for wound-associated bacteria since they displayed a significant increase in their sensitivity profiles to the tested antibiotic and a reduction in their ability to form biofilm. The increased bacterial sensitivity to antibiotics and a limited tendency toward biofilm formation would suggest the great potential therapeutic use of this Saudi honey (Sumra and Sidr) to treat wound infections.Keywords: Sider and Sumra honey, Saudi honey, resistance, biofilm formation, antibiotic susceptibility
