Giant Microbes Plush - Chlamydia (Chlamydia Trachomatis)Giant Microbes Plush Chlamydia (Chlamydia Trachomatis) Playing doctor is a game you don't want to lose. Know the rules. Our STDs are the perfect reminder to get tested and be safe. All About Chlamydia (Chlamydia Trachomatis) FACTS: Chlamydia is perhaps the most common of all sexually transmitted diseases, though it is comparatively unsung. While it can produce symptoms such as discharges, burning sensations, abnormal bleeding, pain, and nausea, these