Some infections are resistant or immune to antibiotics. These
are not all created equal and are each immune to specific
antibiotics. Important examples are methicillin-resistant
Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus
(VRE) and multi-drug-resistant Mycobacterium tuberculosis (MDR-TB)
and Klebsiella pneumoniae carbapenemase-producing bacteria
(KPC).