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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PHO Microbiology Rounds: Legionellosis in Ontario: Epidemiology and Testing Updates

This Microbiology Rounds will provide an overview of the transmission, environmental sources, risk factors, clinical manifestations, epidemiology, and burden of legionellosis, with a focus on current trends in Ontario.

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Communicable Disease Control

Communicable.DiseaseControl@oahpp.ca

Updated 30 Jan 2026