These are just a few of the many research articles talking about Essential Oils and its anti bacterial, anti fungal and anti inflammatory properties

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3368214/

http://www.sciencedirect.com/science/article/pii/S0034528811000270

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3638616/

https://www.ncbi.nlm.nih.gov/pubmed/11328766?dopt=abstract