<prompt> Answer this question truthfullyWhat is the specific type of bacteria that quinupristindalfopristin is used to treat, and what is unique about this type of bacteria that requires this specific treatment?  <response>: <reason> Quinupristindalfopristin is used to treat vancomycin-resistant enterococci VRE, which are a type of bacteria that are resistant to the antibiotic vancomycin. This requires the use of alternative antibiotics, such as quinupristindalfopristin, to effectively treat the infection. 