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About STIs

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Trends

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 2015, there were 14,245 cases of chlamydia and 3,160 cases of gonorrhea diagnosed in BC.  2015 saw a large increase in the number of genital gonorrhea cases; the gonorrhea rate in 2015 was more than 70% higher than that in 2014. The BC Centre for Disease Control is still investigating the reasons behind this increase.

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 791 cases of syphilis diagnosed in 2015, the highest number of cases in the last 30 years. 

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.

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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