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