It has been easy to test for the presence of gonorrhea by viewing a Gram stain of the urethral discharge under a microscope: The causative organism is distinctive in appearance; however, this works only with men because other<unk> -pathogenic gram-negative microbes are present as normal flora of the vagina in women. Thus, one of the major causes of<unk>  can be identified (in men) by a simple common test, and the distinction between<unk>  and<unk>  arose for this reason.<unk>  <unk>  is diagnosed if a person with<unk>  has no signs of gonorrhea bacteria on laboratory tests. The most frequent cause of<unk>  (23%-55% of cases) is C. trachomatis.<unk> -specific<unk>  In the United Kingdom,<unk>  is more often called<unk> -specific<unk> ; "non-specific" is a medical term meaning "specific cause has not been identified", and in this case refers to the detection of<unk> , and the testing for but found negative of gonorrhea. In this sense, the most likely cause of NSU is a chlamydia infection. However, the term NSU is sometimes distinguished and used to mean that both gonorrhea and chlamydia have been ruled out. Thus, depending on the sense, chlamydia can either be the most likely cause or have been ruled out, and frequently detected organisms are Ureaplasma urealyticum and Mycoplasma hominis.
Non-gonococcal urethritis
Creatorrhea
Genitourinary amoebiasis
Blennorrhea
Cystitis glandularis
Logorrhea 
Atrophic vaginitis
Pilonidal disease