Fabimycin has worked well in testing, against over 200 clinically isolated colonies of antibiotic-resistant bacteria, which included more than 50 strains of bugs like E. coli, Klebsiella pneumoniae and Acinetobacter baumannii.
In tests performed on mice, fabimycin was found to clear up drug-resistant cases of pneumonia or urinary tract infections, and it actually reduced the bacteria levels even lower than they were pre-infection.
That is very promising, but it is still early days.
Press release found here:
https://www.acs.org/content/acs/en/pressroom/presspacs/2022/acs-presspac-august-10-2022/new-drug-candidate-fights-off-more-than-300-drug-resistant-bacteria.html