The number of syphilis and chlamydia cases increased statewide last year as the number of gonorrhea cases dropped slightly, according to newly released figures from the Centers for Disease Control and Prevention (CDC). Nationally, the number of cases involving all three common sexually transmitted diseases increased for the first time since 2006, the CDC reports. The 2014 Sexually Transmitted Disease Surveillance Report, which was released in November, shows that, nationally, the number of reported cases of syphilis increased 15 percent over the number reported in 2013. The number of gonorrhea cases rose 5 percent last year, and reported chlamydia cases increased by 3 percent. Statistics for the state show a slightly different picture.