The bacteria can infect urethra, cervix, or eyes. In women, chlamydia can lead to sterility, pregnancy complications or can infect infants during delivery. Gonorrhea is caused by Neisseria gonorrhoeae, and is transmitted sexually. The bacteria can infect genitals, throat, eyes or rectum. In men and women, gonorrhea can lead to sterility.
Women can infect their infants during delivery.
Syphilis is caused by the bacterium Treponema pallidum, and is transmitted sexually or from contaminated blood. Mothers can pass the disease to infants during pregnancy. Glands in the area of infection typically are swollen. Genital or oral areas are the most common infection sites. A sparse, clear discharge from the urethra, redness and irritation are common symptoms.