Chlamydia

Chlamydia is a sexually transmitted bacterial infection caused by Chlamydia trachomatis. It can spread through vaginal, anal or oral sex. Symptoms include painful urination, increased vaginal discharge and discharge from the penis. Asymptomatic infections are common. Without antibiotic treatment, chlamydia can lead to infertility or pass from mother to infant during birth. It can be prevented through safer sex practices such as condom use and is treated with antibiotics.

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Event

PHO Rounds: Respiratory Season 2026–27, Part 2: Overview of Seasonal Respiratory Virus Immunizations in Ontario

The Rounds will review the immunization products available this fall in Ontario, summarize the evidence supporting their use, and highlight new recommendations and changes to the immunization landscape for the 2026–27 respiratory season.

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Contact the Department

Communicable Disease Control

Communicable.DiseaseControl@oahpp.ca

Updated 30 Jan 2026