BACKGROUND: Pseudomonas aeruginosa (PA) and Staphylococcus aureus (SA) biofilms are associated with poor chronic rhinosinusitis (CRS) disease control following surgery. Manuka honey (MH) has been shown to be both an effective in vitro treatment agent for SA and PA biofilms and nontoxic to sinonasal respiratory mucosa. Methylglyoxal (MGO) has been reported to be the major antibacterial agent in MH. The effect of this agent against SA and PA biofilms has yet to be reported. Our objective was to determine the in vitro effect of MGO against biofilms of SA and PA, via in vitro testing of MGO against bacterial biofilms. METHODS: An established biofilm model was used to determine the effective concentration (EC) of MGO against 10 isolates of methicillin-resistant SA (MRSA) and PA. The EC of MGO was also determined against planktonic (free-swimming) MRSA and PA. RESULTS: For MRSA, the EC against planktonic organisms was a concentration of 0.08 mg/mL to 0.3 mg/mL whereas against the biofilm MRSA isolates, the EC ranged from 0.5 mg/mL to 3.6 mg/mL. For PA, the EC against planktonic organisms was a concentration of 0.15 mg/mL to 1.2 mg/mL for planktonic organisms whereas against the biofilm PA isolates, the EC ranged from 1.8 mg/mL to 7.3 mg/mL. CONCLUSION: MGO, a component of MH, is an effective antimicrobial agent against both planktonic and biofilm MRSA and PA organisms in vitro.
BACKGROUND:Pseudomonas aeruginosa (PA) and Staphylococcus aureus (SA) biofilms are associated with poor chronic rhinosinusitis (CRS) disease control following surgery. Manuka honey (MH) has been shown to be both an effective in vitro treatment agent for SA and PA biofilms and nontoxic to sinonasal respiratory mucosa. Methylglyoxal (MGO) has been reported to be the major antibacterial agent in MH. The effect of this agent against SA and PA biofilms has yet to be reported. Our objective was to determine the in vitro effect of MGO against biofilms of SA and PA, via in vitro testing of MGO against bacterial biofilms. METHODS: An established biofilm model was used to determine the effective concentration (EC) of MGO against 10 isolates of methicillin-resistant SA (MRSA) and PA. The EC of MGO was also determined against planktonic (free-swimming) MRSA and PA. RESULTS: For MRSA, the EC against planktonic organisms was a concentration of 0.08 mg/mL to 0.3 mg/mL whereas against the biofilm MRSA isolates, the EC ranged from 0.5 mg/mL to 3.6 mg/mL. For PA, the EC against planktonic organisms was a concentration of 0.15 mg/mL to 1.2 mg/mL for planktonic organisms whereas against the biofilm PA isolates, the EC ranged from 1.8 mg/mL to 7.3 mg/mL. CONCLUSION:MGO, a component of MH, is an effective antimicrobial agent against both planktonic and biofilm MRSA and PA organisms in vitro.
Authors: Samuel J M Hale; Brett Wagner Mackenzie; Christian A Lux; Kristi Biswas; Raymond Kim; Richard G Douglas Journal: Front Pharmacol Date: 2022-06-13 Impact factor: 5.988
Authors: Jing Lu; Lynne Turnbull; Catherine M Burke; Michael Liu; Dee A Carter; Ralf C Schlothauer; Cynthia B Whitchurch; Elizabeth J Harry Journal: PeerJ Date: 2014-03-25 Impact factor: 2.984
Authors: Sophie E L Bulman; Giuseppe Tronci; Parikshit Goswami; Chris Carr; Stephen J Russell Journal: Materials (Basel) Date: 2017-08-16 Impact factor: 3.623
Authors: Ana Oliveira; Henrique G Ribeiro; Ana C Silva; Maria D Silva; Jessica C Sousa; Célia F Rodrigues; Luís D R Melo; Ana F Henriques; Sanna Sillankorva Journal: Front Microbiol Date: 2017-12-08 Impact factor: 5.640
Authors: Dee A Carter; Shona E Blair; Nural N Cokcetin; Daniel Bouzo; Peter Brooks; Ralf Schothauer; Elizabeth J Harry Journal: Front Microbiol Date: 2016-04-20 Impact factor: 5.640