Syphilis rates in blacks, women and babies declined significantly between 1999 and 2004 but continued to rise overall, driven by a dramatic jump in infections among gay and bisexual men, the Centers for Disease Control and Prevention said Monday. About 64% of all the new syphilis cases in 2004 were in men who had engaged in homosexual activity, according to the CDC. That group made up 5% of the syphilis cases in 1999. "Increases in gay and bisexual men are overshadowing the decreases," Dr. Kevin Fenton, director of the CDC's National Center for HIV, Sexually Transmitted Disease and Tuberculosis Prevention,...