This study was funded by Mars Petcare. The authors wish to
acknowledge the team of research assistants that made the study
possible, in particular Ruth Oni, Luxi Wang, Xinyue Wang, Kathy
Lou, Dan Li, and Yu Wang. We thank Dr. Shaohua Zhao and Ms.
Sherry L. Ayers at the U.S. FDA Center for Veterinary Medicine in
Laurel, MD, USA for providing the Salmonella strains used in the
experiment.