Antibiotic resistance results in the generation of “superbugs”, bacteria that can circumvent every antibiotic we currently have.
As antibiotics kill bacteria, some bacteria evolve resistance mechanisms. These mechanisms can be very diverse and can be shared between different bacteria. Once bacteria are resistant to a specific antibiotic, that antibiotic and even other antibiotics with the same general mechanism are no longer able to control the infection caused by those bacteria.
Due to the widespread (and sometimes in appropriate) use of antibiotics, antibiotic resistance is rapidly increasing.
The Centers for Disease Control and Prevention (CDC) estimates that 23,000 people in the US die every year from antibiotic resistant infections. The CDC has characterized the biggest bacterial threats in antimicrobial resistance.