received blow job unprotected from escort based in Sydney of Thai background. Came in mouth to completion.  No sex genitally, some kissing and sucking balls.

Concerns are;

1) HIV reading through background questions this is low risk

2) HSV - past test confirm i dont have hsv 1 or 2 what are the chances this is my unlucky day? Note i did not see any marks on her face.

3) other stds like syphilllis!

I have a regular partner can i have a normal sex life with her or do i need the battery of std test!

Thanks in advance?

Very worried and regretful

Oral sex isn't entirely free of STD risks, but all STDs are transmitted far less frequently by oral than by vaginal or anal sex. Whether or not you ejaculated in your partner's mouth has no bearing on risk, and kissing and your partner's oral contact with your scrotum are risk free. "Escorts" -- expensive female sex workers by appointment, as opposed to brothel workers, street walkers, or bar pickups -- tend to be safe partners with low STD frequency. Most understand the risks, take precautions like condoms for vaginal or anal sex, get tested frequently, and mostly have low risk partners (men like you). Your partner's national origin or ethnicity probably make no difference in risk.

The three main STD risks for the insertive partner in fellatio -- i.e. penis in a partner's mouth -- are gonorrhea, nongonococcal urethritis (NGU), and herpes due to HSV1. However, all these are uncommon after any single exposure. Gonorrhea is no risk unless your partner had oral gonorrhea -- which is present in well under 5% of female sex workers in most geographic areas. NGU from oral sex usually is not due to serious STDs (for example, almost never chlamydia) and is believed to often result from penile exposure to entirely normal oral bacteria, and is harmless. Herpes is discussed below, since it's one of your main concerns. 

1. HIV:  Correct, nearly zero risk. There has never been a proved case of oral to penile transmission of HIV. The US Centers for Disease Control and Prevention (CDC) has estimated that if the oral partner has HIV, the risk to the penile partner is around one in 20,000. That's equivalent to receiving BJs by infected partners every day for 55 years before infection might be likely. 

2. Herpes:  Oral HSV2 is rare and oral to genital transmission nearly zero risk. Oral HSV1 is common, but very low risk without an obvious oral outbreak. Most escorts would know to not perform fellatio during an oral herpes outbreak or oral or facial sores. All in all, herpes not a significant risk from this event.

3. Syphilis:  Based on both the low likelihood of syphilis in female escorts and my understanding of the epidemiology of syphilis in Australia, it is very unlikely your partner has it. Syphilis can be transmitted by oral sex, but rarely. 

Testing for STDs is optional in this situation. If somehow I were in your situation, I wouldn't be tested and after a week or so without symptoms (penile discharge, genital blisters or sores) would continue unprotected sex with my wife without worry. That said, some persons are more reassured by negative test results than by professional opinion, no matter how expert. If that applies to you, feel free to have a urine gonorrhea/chlamydia test, which is valid after 3-4 days. (Chlamydia is virtually zero risk, but testing is automatic along with gonorrhea.) And blood tests for syphilis and HIV after 6 weeks. There definitely is no need for any other tests; you don't need any sort of "comprehensive" test battery.

Australia's federally funded sexual health centres are probably the world's very best network of STD/HIV clinics, and Sydney's SHCs are the best of the best (along with Melbourne). You would never go wrong with their advice, either by phone or an in-person visit. I'm confident they would confirm my assessment and advice.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD

I didnt see any marks on her face and she said she does get tested.

So from the reply below wait a week to see if i get any symptoms before having unprotected sex with my wife?

I havent ever had cold sores so this is a main concern

I should have clarified that im not sure if she gets tested for herpes as its not part of normal std panel testing in Sydney. Im assuming the absence of physical symptoms this reduced the risk of aquiring genital hsv by blow job  

I will keep try and stay mellow for a week and see how it goes. Would this be for syphilis as well?

The initial lesion of syphilis (the genital ulcer called a chancre) appears after 10-20 days. But syphilis is too unlikely in this situation to be a significant risk. As I said above, if somehow I were in your situation it wouldn't affect my decision to continue sex with my wife. But it still makes sense to be tested in 6 weeks -- accepting the minuscule risk of an uncomfortable discussion with your wife. Same for HIV.

That completes the two follow-up exchanges included with each question and so ends this thread. I hope the discussion has been helpful. Best wishes and stay safe.