of the most important vectors of human diseases worldwide. In this study, we trapped flies on
a university campus and tested them for mobile resistance genes against colistin, a last-
resort antibiotic in human medicine for treating clinical infections caused by multidrug-
resistant Gram-negative bacteria. Quantitative PCR assays we developed showed that
34.1% of Musca domestica (86/252) and 51.1% of Protophormia terraenovae (23/45) …