The arms race between humanity and disease-causing bacteria is drawing to a close—and the bacteria are winning. The latest evidence: gonorrhea is becoming resistant to all standard antibiotic treatment. Gonorrhea is one of the most common sexually transmitted diseases in the world—with about 600,000 cases diagnosed in the U.S. each year. A few years ago, investigators started seeing cases of infection that did not easily respond to treatment with a group of drugs called cephalosporins, which are currently the last line of defense against this particular infection. Now, the number of drug-resistant cases has grown so much in the U.S....