Manuka honey is bactericidal against Pseudomonas aeruginosa and results in differential expression of oprF and algD
Roberts, Aled Edward Lloyd
Society for General Microbiology
MetadataShow full item record
The presence of Pseudomonas aeruginosa in cutaneous wounds is of clinical significance and can lead to persistent infections. Manuka honey has gained ground in clinical settings due to its effective therapeutic action and broad spectrum of antibacterial activity. In this study, the effect of manuka honey on P. aeruginosa was investigated using MIC, MBC, growth kinetics, confocal microscopy, atomic force microscopy and real-time PCR. A bactericidal mode of action for manuka honey against P. aeruginosa was deduced (12 %, w/v, MIC; 16 %, w/v, MBC) and confirmed by confocal and atomic force microscopy, which showed extensive cell lysis after 60 min exposure to inhibitory concentrations of manuka honey. The inability of honey-treated cells to form microcolonies was demonstrated and investigated using Q-PCR for three key microcolony-forming genes: algD, lasR and oprF. The expression of algD increased 16-fold whereas oprF expression decreased 10-fold following honey treatment; lasR expression remained unaltered. These findings confirm that manuka honey is effective at inducing cell lysis and identify two targets, at the genetic level, that might be involved in this process.
Microbiology (2012), 158, 3005–3013
This article has been published in final form at http://dx.doi.org/10.1099/mic.0.062794-0
- Un-themed 
Showing items related by title, author, subject and abstract.
Henriques, Ana (University of Wales, 2006)Honey is an old remedy recently rediscovered as a possible alternative to modern antibiotics in wound management but its mode of action is not fully understood. The antibacterial activity of honey can be divided into ...
Roberts, Aled Edward Lloyd (Cardiff Metropolitan University, 2014)Although manuka honey has been shown to inhibit Pseudomonas aeruginosa, an opportunistic pathogen implicated in cutaneous wound infections, the mechanisms of action are not yet defined. The purpose of this study, therefore, ...
Al-Maaini, Rahma Ali Saleh (University of Wales, 2012)Honey has been shown to have therapeutic properties, which include immunomodulatory and antibacterial activity in vitro and anti-inflammatory, antipyretic and wound healing properties in vivo. A complex mix of factors ...