About STIs

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The BC Centre for Disease Control tracks the number of cases of reportable STIs over time to see if there are increases or decreases in infection rates. In 2017, there were 15,426 cases of chlamydia and 2,654 cases of gonorrhea diagnosed in BC.

Chlamydia and gonorrhea cases have been increasing since the late 1990s. This increase may be partly explained by improved tests for chlamydia and gonorrhea and by the fact that more people have been getting tested.

BC is currently experiencing a syphilis epidemic, as is most of North America and Europe. The number of syphilis cases is higher now than what we would expect (for example, based on numbers before 2000). There were 683 cases of syphilis diagnosed in 2017, and 919 cases in 2018.

Since the initial height of the HIV epidemic in BC in the 80’s and early 90’s, the number of HIV cases leveled off and more recently has been decreasing, reaching the fewest cases seen since before the HIV epidemic started in the 1980s.

The following graphs show each of the reportable STIs with adjusted scales to highlight the trends over the past 20 year period.

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HIV, chlamydia, gonorrhea, syphilis, case, rate, trends
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