<unk>  is the ability of a micro-organism to withstand the effects of an<unk> . It is a specific type of drug<unk> .<unk>  evolves naturally via natural selection through random mutation, but it could also be engineered.  Once such a gene is generated, bacteria can then transfer the genetic information in a horizontal fashion (between individuals) by plasmid exchange.  If a bacterium carries several<unk>  genes, it is called multiresistant or, informally, a superbug.<unk>  can also be introduced artificially into a micro-organism through transformation protocols.  This can be a useful way of implanting artificial genes into the micro-organism.
Antibiotic resistance
Drug resistance
Opportunistic infection
Nosocomial infection
Virulence
Sepsis pathophysiology
Guidewire complications
Moral hazard