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Sexually Transmitted Infections (STIs)

Sexually Transmitted Infections (STIs)

Sexually Transmitted Infections (STIs) are caused by micro-organisms such as viruses or bacteria that are transmitted through sexual contact, particularly vaginal, oral or anal sex. According to the World Health Organization, each year, there are over 350 million new cases around the world.

We provide public health workers with expertise, support and resources for the prevention and control of STIs.

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Surveillance Report

This report describes the key characteristics of early congenital and maternal syphilis cases in Ontario from 2020-2022.

941 KB
Published 27 Feb 2024

Summary Report

This report describes the epidemiology of chlamydia in Ontario with a focus on cases reported in 2022, including data on trends over time, age and sex, geography, site of infection and testing.

1.3 MB
Published 12 Jan 2024

Summary Report

This report describes the epidemiology of gonorrhea in Ontario with a focus on cases reported in 2022, including data on trends over time, age and sex, geography, site of infection and testing.

1.7 MB
Published 12 Jan 2024

Summary Report

This report describes the epidemiology of infectious syphilis and early congenital syphilis in Ontario with a focus on cases reported in 2022, including incidence by age, sex, geography, and testing.

2.3 MB
Published 12 Jan 2024

Evidence Brief

An evidence brief that summarizes internet-based contact tracing for sexually transmitted infections and considerations for implementation. 

1.2 MB
Updated 6 Sep 2019

Best Practice

A testing algorithm that summarizes the current testing options for gonorrhea, chlamydia, and syphilis in Ontario.

218 KB
Updated 28 June 2019

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Chlamydia

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Ophthalmia Neonatorum

Syphilis
Event

PHO Rounds: Overview of Influenza, COVID-19, and RSV Immunization for the 2024-25 Respiratory Season

This PHO Rounds will provide an overview of the influenza, COVID-19 and RSV vaccines to be used in the 2024-25 respiratory season.

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Updated 22 Oct 2019
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