Hey, I'm not the one asking the question so your to: should be directed toward the user :)
How long have you been on the boards? We recently had a user contract chlamydia orally.
It depends on the type of oral sex performed - unprotected fellatio does state a possibility of chlamydia, gonorrhea, herpes, syphilis and HIV; however, oral sex is considered a low risk and if performing unprotected cunnilingus, these risks are considered even lower. Time and time again, the doctors have stated that oral chlamydia is rare because it doesn't transmit well into the throat - yet, with unprotected fellatio, gonorrhea could.
The biggest risks are herpes and syphilis - HIV is also considered pretty low risk.
Yes, a long with gonorrhea, herpes, syphilis, and HIV. All in varying likelihoods, but the possibility is still there.