All are features of Ureaplasma urealyticum, EXCEPT:

Ureaplasma urealyticum, which requires 10% urea for growth, probably causes nongonococcal urethritis in some men. U urealyticum is common in the female genital tract, where the association with disease is weak. The main reservoir of human species of Ureaplasma is the genital tract of sexually active men and women; it is rarely found before pubey. Colonization, which probably results primarily from sexual contact, occurs in more than 80% of individuals who have had three or more sexual paners. In women, Ureaplasma have been shown to cause chorioamnionitis and postpaum fever. Ureaplasma are found as often in controls as in male patients with urethritis. Also know: Ureaplasma are distinguished from Mycoplasma by production of urease and growth only in media with an acid pH. Ref: Ray C.G., Ryan K.J. (2010). Chapter 38. Mycoplasma and Ureaplasma. In C.G. Ray, K.J. Ryan (Eds), Sherris Medical Microbiology, 5e