Antimicrobial resistant organisms (AROs) are microbes, such as bacteria, viruses, fungi, and parasites, that have developed resistance to antimicrobial agents used to treat infections they cause. This resistance occurs when these organisms evolve mechanisms to withstand the drugs designed to kill them or inhibit their growth. The most well-known examples include Methicillin-resistant Staphylococcus aureus (MRSA), Vancomycin-resistant Enterococci (VRE), and multidrug-resistant Mycobacterium tuberculosis.
