Epidemiology Week 28

10 Facts on Antimicrobial Resistance (Part 1)

 

What is antimicrobial resistance?

Antimicrobial resistance is the ability of a microorganism (like bacteria, viruses, and some parasites) to stop an antimicrobial (such as antibiotics, antivirals and antimalarials) from working against it. As a result, standard treatments become ineffective, infections persist and may spread to others.

 

Drug resistance is a global problem

Over the past years, the use and misuse of antimicrobials has increased the number and types of resistant organisms. Consequently many infectious diseases may one day become uncontrollable. With the growth of global trade and travel, resistant microorganisms can spread promptly to any part of the world.

 

What causes drug resistance?

Drug resistance is a natural evolutionary phenomenon. When microorganisms are exposed to an antimicrobial, the more susceptible organisms succumb, leaving behind those resistant to the antimicrobial. They can then pass on their resistance to their offspring.

 

Inappropriate use of medicines worsens drug resistance
Inappropriate use of antimicrobials drives the development of drug resistance. Overuse, underuse and misuse of medicines contribute to the problem. Ensuring that patients are informed about the need to take the right dosage of the right antimicrobial requires action from prescribers, pharmacists and dispensers, pharmaceutical industry, the public and patients, as well as the policy makers.

 

Lack of quality medicines contributes to drug resistance

Most drug quality assurance systems are weak. This can lead to poor quality medicines, exposing patients to sub-optimal concentrations of antimicrobials, thus creating the conditions for drug resistance to develop. In some countries poor access to antimicrobials forces patients to take incomplete courses of treatment or to seek alternatives that could include substandard medicines.

 

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