This article will tell you which bodily fluids are involved in the... STI transmission plays a role in determining the respective risk level. and how you can effectively protect yourself – without sacrificing intimacy to have to do without.
These bodily fluids play a role in sex.
During sexual activities, we encounter various issues. Body fluids in contact. Each of them has a different Potential to transmit pathogens – depending on the viral load or… Bacterial concentration.
Sperm (ejaculate)
Semen contains potentially high concentrations of HIV, Hepatitis B, chlamydia, gonorrhea, and other pathogens. This applies. as one of the main transmission sources for many STIs.vaginal secretions
Vaginal fluid can also contain pathogens such as HIV, Contains chlamydia, gonorrhea, HPV, herpes and trichomonads – especially in the case of an existing infection.Pre-ejaculate (pre-cum)
Pre-ejaculate is often underestimated: it can be present even before ejaculation. Orgasms can contain HIV, gonorrhea, and chlamydia – even if the The concentration is lower than in the ejaculate.blood
Blood has the highest concentration of HIV and hepatitis viruses (B and C). Contact with blood – even small amounts Micro-injuries pose an increased risk of transmission.saliva
Saliva does not play a major role in most STIs. Exceptions: Herpes (HSV) and, in rare cases, syphilis can can be transmitted through kissing.rectal secretion
During anal sex, rectal secretions can transmit pathogens such as HIV, gonorrhea, Chlamydia and HPV are transmitted. The sensitive anal mucosa It also promotes micro-injuries.
Transmission risk via bodily fluids
Not every bodily fluid transmits every STI equally well. Here's one example. Overview of which pathogens are transmitted via which fluids can be.
| STI / Pathogen | semen | vaginal secretions | Pre-cum | blood | saliva |
|---|---|---|---|---|---|
| HIV | High | High | Medium | Very high | Very low |
| Hepatitis B | High | High | Medium | Very high | Small amount |
| Hepatitis C | Small amount | Small amount | Very low | Very high | Very low |
| Chlamydia | High | High | Medium | – | – |
| gonorrhea | High | High | Medium | – | Rarely |
| syphilis | Medium | Medium | Small amount | High | In cases of lesions |
| Herpes (HSV) | Small amount | Small amount | Small amount | – | High |
| HPV | Small amount | Small amount | Small amount | – | Rarely |
Important to know:
HPV and herpes are mainly caused by Transmitted through skin-to-skin contact – not primarily through Body fluids. Condoms reduce the risk, but offer no protection. no complete protection, as not all infected areas be covered.
Pre-ejaculate: An underestimated risk?
Pre-ejaculate – colloquially known as pre-cum – is a clear fluid that comes out of the penis during sexual arousal, before orgasm. Many underestimate its effects. Transmission potential.
What is pre-ejaculate?
Pre-ejaculate is produced by the Cowper's glands and serves as a... as a natural lubricant. It also neutralizes the acidic environment. pH level in the urethra to protect sperm.What pathogens does it contain?
Studies show that pre-ejaculate can transmit HIV, gonorrhea, and It may contain chlamydia. The concentration is usually lower. than in the ejaculate, but potentially for transmission sufficient.Why is this relevant?
Those who only put on a condom shortly before orgasm or Even when "coitus interruptus" is practiced, it is still exposed to a risk of transmission – through pre-ejaculate.How can you protect yourself?
Condoms should be used from the very beginning – that is, before the first contact with mucous membranes – can be used. This also reduces the risk from minimizes the pre-ejaculate.
Not just liquids: Other transmission routes
STIs are not only transmitted through bodily fluids. Some Pathogens use other routes that are often less well known.
skin-to-skin contact
HPV, herpes (HSV), syphilis and pubic lice are primarily transmitted by transmitted through direct skin contact – even without exchanging Body fluids.Oral sex
Oral sex can transmit gonorrhea, chlamydia, syphilis, herpes and HPV can be transmitted. The risk of HIV is increased during oral sex. lower, but not zero.Smear infection
Some pathogens, such as trichomonads or chlamydia, can theoretically can be transmitted via shared sex toys – if These cannot be cleaned.
Here's how to protect yourself effectively
There are various ways to reduce the risk of Reducing STI transmission – from barrier methods to… regular tests.
Condoms & Femidomes
Condoms are the best protection against many STIs – provided, They are used correctly from the start. (Female condoms) are an alternative for vaginal and Anal sex.Dental dams (dental dams)
Dental dams offer protection during oral sex on the vulva or anus. They are thin latex sheets that act as a barrier between the mouth and genitals/anus are used.PrEP (HIV prophylaxis)
Pre-exposure prophylaxis (PrEP) provides very effective protection against HIV – but it does not protect against other STIs. It is useful for People at increased risk of HIV infection.Vaccinations
There are effective treatments for hepatitis A, hepatitis B and HPV. Vaccinations. The HPV vaccine protects against the most common HPV infections. cancer-causing virus types and genital warts.
Regular testing – the most important protection
- Many STIs are asymptomatic – only a test can provide certainty.
- Test at least every 3-6 months if you have different partners.
- After unprotected sex with an unknown sexual partner: get tested promptly.
- Open communication with partners about STI status
- Positive results mean early treatment – good for everyone.
STI Pro: Comprehensive test for 10 pathogens
Want to know where you stand – discreetly and easily? The STI Pro tests for the 10 most important sexually transmitted infections, including HIV, hepatitis, chlamydia, gonorrhea and more.
Variant: Urine & Dried Blood
Ideal for men or when a vaginal swab is not desired. The urine sample tests for urethral infections, the dried blood on HIV, syphilis and hepatitis.Variant: Vaginal swab & dried blood
Ideal for women: The vaginal smear is suitable for cervical cancer. Infections more reliably detected than urine. Combined with the Dried blood spot test: a comprehensive solution.Discreetly from home
Sample collection at home, shipping in a prepaid envelope, Results digitally in your DoctorBox account. No waiting times. full control.Certified laboratory analysis
The samples are analyzed in an accredited German laboratory. analyzed. You get reliable results on the same platform. Level of care comparable to a doctor's office.
The STI Pro tests on:
HIV Hepatitis B & C syphilis Chlamydia Gonorrhea Mycoplasmas (M. genitalium & M. hominis) Trichomonads Ureaplasma (U. urealyticum & U. parvum)
Discover STI Pro now →
Conclusion: Knowledge protects
Knowledge of transmission paths is the first step towards better Protection. Combine this knowledge with consistent condom use. Vaccinations where possible and regular tests – that's how you can protect yourself. Taking active control of sexual health.
















