Urethral cultures can be obtained for:

• Chlamydia
• Gonorrhea
• Other microorganisms

The urethra is normally sterile.

Source: Operational Medicine 2001,  Health Care in Military Settings, NAVMED P-5139, May 1, 2001, Bureau of Medicine and Surgery, Department of the Navy, 2300 E Street NW, Washington, D.C., 20372-5300