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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.

Featured

Summary Report

This report describes the epidemiology of chlamydia in Ontario with a focus on cases reported in 2023, including data on trends over time, age and sex, geography, site of infection and testing.

1.6 MB
Published 7 Jan 2025

Summary Report

This report describes the epidemiology of gonorrhea in Ontario with a focus on cases reported in 2023, including data on trends over time, age and sex, geography, site of infection and testing.

1.6 MB
Published 7 Jan 2025

Summary Report

This report describes the epidemiology of infectious syphilis and early congenital syphilis in Ontario with a focus on cases reported in 2023, including incidence by age, sex, geography, and testing.

1.8 MB
Updated 7 Jan 2025

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

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

Find Information On...

Chancroid

Documents, resources and related links for chancroid, a sexually transmitted bacterial infection caused by Haemophilus ducreyi.

Chlamydia

Documents, resources and related links for chlamydia, a sexually transmitted bacterial infection caused by Chlamydia trachomatis.

Gonorrhea

Documents, resources and related links for gonorrhea, a sexually transmitted bacterial infection caused by Neisseria gonorrhoeae.

HIV/AIDS

HIV/AIDS is a virus most commonly spread through unprotected sex and sharing HIV-contaminated needles or syringes.

Ophthalmia Neonatorum

Documents, resources and related links for ophthalmia neonatorum, a bacterial eye infection in newborn infants that is passed from a mother with a gonorrhea or chlamydia infection during birth.

Syphilis

Documents, resources and related links for syphilis, a sexually transmitted infection caused by Treponema pallidum.

Event

PHO Rounds: Enhancing Collective Efficacy: Practical Considerations for Public Health Agencies

This practice-oriented presentation defines the concept of collective efficacy, characterizes its relevance to public health organizations, and provides evidence-informed strategies for enhancing collective efficacy in public health institutions.

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Updated 7 Jan 2025
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