WHITEHOUSE STATION, N.J.--(BUSINESS WIRE)--Merck & Co., Inc. announced today that the U.S. Food and Drug Administration (FDA) recently approved INVANZ® (ertapenem), a once-daily injectable antibiotic, for the prophylaxis of surgical site infection (SSI) following elective colorectal surgery in adults. This approval was based upon the results of the landmark PREVENT trial, the largest prospective, randomized double-blind, comparative clinical trial ever conducted in antibiotic prophylaxis for elective colorectal surgery (N=1002). Results from the study were presented today in the New England Journal of Medicine.