In Central Florida, the rise is even more dramatic. Among those 55 and older, the reported cases of syphilis and chlamydia increased 71 percent in that same five-year period. That puts Central Florida ahead of the state, which saw a 62 percent rise in those two sexually transmitted infections among the same age group.

The rates at which syphilis and chlamydia increased among older adults outpaced the nation’s average. Among all age groups nationwide, reported cases of syphilis increased 60 percent between 2005 and 2009; among those in the 55 to 64 age group, it went up 70 percent. Meanwhile, the incidence of chlamydia rose 27 percent among all ages, and double that among the older group.