Fosfomycin susceptibility data from the USA are limited.
Activity of fosfomycin against 323 clinical urine isolates was determined.
Overall susceptibility to fosfomycin was 94.4%, 93.5% and 87.9% by agar dilution, disk diffusion and Etest, respectively.
Fosfomycin displayed fairly consistent activity against a majority of contemporary isolates when using the susceptibility breakpoint of 64 μg/mL.