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Antimicrobial resistance (AMR) is resistance of a microorganism -bacteria, viruses and some parasites- to an antimicrobial medicine -such as antibiotics, antivirals, and antimalarials- so that standard treatments become ineffective and infections persist and may spread to others to which it was previously sensitive.

AMR is a consequence of the use, particularly the misuse, of antimicrobial medicines and develops when a microorganism mutates or acquires a resistance gene. Other factors also increase the magnitude of the problem, such as the use of antibiotics in agriculture and animal consumption, and fragile programs on Infection Prevention and Control. 

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