Chlamydia is the most common sexually transmitted infection in Canada. It is caused by bacteria that are transmitted through unprotected oral, vaginal or anal sex. It can also be passed on from mother-to-child during childbirth.
Although there are signs and symptoms for chlamydia, some people will not have any of them. You can still pass on the infection if you don't have any signs or symptoms. Symptoms differ in males and females.
*Confirmed cases reported Sources: Integrated Public Health Information System [2010-2015], extracted October 25, 2016 by Niagara Region Public Health.
Sources: Integrated Public Health Information System [2006-2013], extracted July 17, 2015; Population Estimates, IntelliHealth, Ministry of Health and Long-Term Care , extracted April 17, 2015.
Ontario data: Ontario Ministry of Health and Long-Term Care, Integrated Public Health System database, extracted by Public Health Ontario [April 20, 2015].