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Staphylococcus aureus  is the most common infectious agent involved in the development of skin infections that are associated with antibiotic resistance, such as burn wounds. As drug resistance is a growing problem it is essential to establish novel antimicrobials. Currently, antibiotic resistance in bacteria is successfully controlled by multi-drug therapies. Here we demonstrate that secondary metabolites present in the extract obtained from  Drosera binata in vitro  cultures are effective antibacterial agents against  S. aureus  grown in planktonic culture and in biofilm. Moreover, this is the first report demonstrating the synergistic interaction between the  D. binata  extract and silver nanoparticles (AgNPs), which results in the spectacular enhancement of the observed bactericidal activity, while having no cytotoxic effects on human keratinocytes. Simultaneous use of these two agents in significantly reduced quantities produces the same effect, i.e. by killing 99.9% of bacteria in inoculum or eradicating the staphylococcal biofilm, as higher amounts of the agents used individually. Our data indicates that combining AgNPs with either the  D. binata  extract or with its pure compound (3-chloroplumbagin) may provide a safe and highly effective alternative to commonly used antibiotics, which are ineffective towards the antibiotic-resistant  S. aureus .

plos one

Combination of Silver Nanoparticles and Drosera binata Extract as a Possible Alternative for Antibiotic Treatment of Burn Wound Infections Caused by Resistant Staphylococcus aureus