Public Health Agency of Canada

This report provides an update on the epidemiology of three nationally notifiable STIs in Canada: chlamydia, gonorrhea and infectious syphilis (including congenital syphilis) using data up to 2018, by province/territory, age group and sex. In addition, updated information related to syphilis...

C. trachomatis is the most common reportable sexually transmitted infection in Canada. If not treated, C. trachomatis can spread from a local site of inoculation and lead to serious complications and/or sequelae, such as pelvic inflammatory disease (PID), ectopic pregnancy, infertility, chronic...

The Public Health Agency of Canada collects information on reported cases of sexually transmitted infections; chlamydia, gonorrhea and infectious syphilis through the Canadian Notifiable Diseases Surveillance System (CNDSS).

Sexually transmitted infections, commonly called STI for short, are infections you can get if you have vaginal, oral or anal sex or intimate skin-to-skin contact with someone.

The Canada Communicable Disease Report is a bilingual, open-access, peer-reviewed journal on the prevention and control of emerging and persistent infectious diseases. 

The Canada Communicable Disease Report is a bilingual, open-access, peer-reviewed journal on the prevention and control of emerging and persistent infectious diseases.