Delaware health officials say the number of chlamydia infections reported in the state this year is up 40 percent from the same time last year.

More than 900 cases of chlamydia have been reported to the Division of Public Health so far this year, compared with about 700 during the same period last year.

Cathy Mosley, the administrator of the Division's sexually transmitted disease program, says the increase reflects a nationwide trend.

She says chlamydia infections have risen as incidents of other sexually transmitted diseases decline.