Petersen EE and Clad A,op. Nicoll A, Hamers FF. Even symptomless STDs can be contagious and can later cause chronic or serious health problems. In a nationally representative study, the seroprevalence of the four HPV types increased from 9 percent among females aged 14 to 19 to 23 percent among those aged 20 to STDs are diseases that are passed from one person to another through sexual contact. The declines were of similar magnitude among male and female adolescents, in most countries and for both periods. Chlamydia appears to be increasing in some countries, but this may be tied mostly to more active screening programs.
Genital herpes infections are caused by the herpes simplex virus HSV.
Adolescents and sexually transmitted diseases.
For those countries that lack an official or published estimate of the reporting rate, national experts were asked for their estimates. This article addresses the current incidence and recent trends of STDs among adolescents aged and young adults aged in the developed world. Certain types of HPV can also cause warts—called common warts—on other body parts such as the hands. The initial symptom of syphilis is a painless open sore that usually appears on the penis, in the vagina, or around either sexual organ. Incidence data for the past decade on three common bacterial STDs—syphilis, gonorrhea and chlamydia—were obtained for as many as 16 developed countries from official statistics, published national sources or scientific articles, and unpublished government data. Centers for Disease Control and Prevention.