Color enhanced transmission electron micrograph (TEM) of Neisseria gonorrhoeae, a gram-negative bacterium, and the causative agent of gonorrhoeae. Gonorrhea is the most common reportable communicable disease in the United States. A contagious inflammation of the genital mucous membranes, gonorrhoeae may also affect the heart, oral mucosa, rectum or joints. In the female, the urethra, vulva, vagina, and fallopian tubes are affected. In the male, a yellow micro purulent discharge from the penis results from the inflammation of the urethra. This can affect the prostrate, causing painful urination. Gonorrhoeae may be treated with penicillin. TEM x20,000 at 2.25 film size.