The term „antibacterial“ refers to the ability to kill bacteria or to inhibit their growth or reproduction. Essential oils that seal that deal are for example tea tree, lemongrass, oregano, helichrysum, peppermint, thyme, frankincense and the famous On Guard blend.
For an antibiotic blend, place 12 drops of On Guard, 6 drops of oregano and 2 drops of frankincense in an empty capsule and ingest every 4-8 hours. Or use 5 drops of On Guard on a damp rag and use it to wipe down surfaces to make sure they are free of any kind of bacteria/viruses/fungi if needed. But know that there is no overall need to fear bacteria/viruses/fungi if you are healthy and strong. No need to become paranoid 
Be well and see you around!