New research finds that reducing antibiotic usage in animal feed is not enough to combat antibiotic resistance

October 07, 2023

Our study shows how evolution can rapidly stabilize resistance genes in pathogen populations, reducing the impact of restricting antibiotic consumption. In 2017, the Chinese government banned the use of last-line antibiotic colistin as a growth promotor in animal feed in response to the rapid spread of antibiotic resistant bacteria- Escherichia coli (E.coli) carrying mobile colistin resistance (MCR) genes. However, large-scale surveillance studies across China following the ban found that the decline in the mcr-1 gene was slower than anticipated. Overuse of antibiotics in livestock farming is a key driver of antimicrobial resistance (AMR). Simply put, it is not enough to reduce antibiotic consumption in order to effectively combat antibiotic resistance.

The source of this news is from University of Oxford