Spermicides or contraceptive jellies, creams, or foams are possible causes of urethritis. Urethritis is inflammation of the urethra and could be caused by bacteria or a virus. Commonly it is caused by bacteria Escherichia coli and some sexually transmitted diseases, Chlamydia, gonorrhea.Gonococcal urethritis is caused by Neisseria gonorrhoeae bacteria.permicides or contraceptive jellies, creams, or foams are possible causes of urethritis. Urethritis is inflammation of the urethra and could be caused by bacteria or a virus. Commonly it is caused by bacteria Escherichia coli and some sexually transmitted diseases, Chlamydia, gonorrhea.