Gonorrhea infections are up more than 60 percent in the past two years in Colorado's El Paso County, and officials there don't know why.
The county, which includes Colorado Springs, is also seeing an increase in cases of the sexually transmitted disease chlamydia.
The county's public health administrator, Rosemary Bakes-Martin, says the increase has her office concerned.
One thing seems certain, the spread is apparently not connected to increases at military bases in the county.
Bakes-Martin says she's unsure of the real reasons. One possibility is financial cuts to her office, which limits how much follow up staffers can do to ensure that a patient's sexual partners have been treated before the disease is spread.