When antibiotics no longer effectively treat a bacterial infection, it is known as. 00:54 Organism Classification and Phylogenesis When antibiotics no longer effectively treat a bacterial infection, it is known as.A - VaccinationsB - SymbiosisC - BacteriophageD - BioluminescenceE - Antibiotic resistanceAnswer: E - Antibiotic resistance Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+