A pilot single center, open label trial to assess the impact of doxycycline postexposure prophylaxis on antimicrobial resistance
This study, called a "pilot trial," is investigating if taking a specific antibiotic, doxycycline, after sex can affect how common bacteria in the body become resistant to antibiotics. This is important because sexually transmitted infections (STIs) are a concern, and doctors want to find ways to prevent them without making antibiotics less effective over time. Researchers will give doxycycline to men and then check samples from their gut and mouth over 180 days to see if the bacteria change their sensitivity to doxycycline and other common antibiotics. The goal is to understand the potential wider impact of this approach on antibiotic resistance before it's used more widely.
At a glance
What is this study about?
This research is a pilot study, which means it's an early investigation to see if an idea is worth exploring further on a larger scale. The main goal is to understand how taking the antibiotic doxycycline after sex might affect the bacteria that naturally live in our bodies, specifically in our gut and mouth. Doxycycline is an antibiotic that can be used to prevent certain sexually transmitted infections (STIs) like chlamydia, gonorrhoea, and syphilis. However, there's a concern that using antibiotics regularly, even for prevention, could lead to antibiotic resistance, making these treatments less effective in the future.
In this study, researchers are looking closely at how sensitive these common bacteria (like E. coli and others) are to different antibiotics, including doxycycline. They will collect samples from people taking part to see if, over time, the bacteria become harder to kill with these antibiotics. This is important because if bacteria become resistant, it means infections become much harder to treat, which can be a serious health problem.
By carefully studying these changes, the researchers hope to understand the potential benefits and risks of using doxycycline in this way. The results will help doctors decide if this is a safe and effective strategy for preventing STIs without causing a bigger problem with antibiotic resistance.
Key takeaways
- This is an early study looking at using doxycycline to prevent STIs.
- It aims to understand if this antibiotic use affects how bacteria become resistant.
- The study involves men aged 18 and over.
- Participants will take doxycycline and provide samples over six months.
- Your participation helps improve understanding of antibiotic resistance and STI prevention.
Who may be eligible?
To take part in this study, you need to be an adult, aged 18 years or older. This study is specifically looking for men to participate.
The researchers are focusing on men because they want to understand how preventative antibiotic use might affect them and the bacteria in their bodies. If you're a woman, this particular study isn't suitable for you. If you meet the age and sex requirements, the research team will ask you some more questions to make sure the study is a good fit for you and that it's safe for you to take part.
- Are you an adult aged 18 years or older?
- Are you male?
- Are you generally healthy and able to attend study appointments?
- Are you able to take oral medication as instructed?
This is a guide only — the research team will confirm whether you can take part.
What does participation involve?
If you decide to take part in this study, you would be given a specific antibiotic called doxycycline (200 mg tablets) to take. The study will last for 180 days, which is about six months. During this time, you would have regular visits where the research team will collect samples from your body, such as from your gut (likely stool samples) and your mouth (like swabs). These samples help them check how the bacteria in your body are responding to the antibiotics.
They will be looking to see if the bacteria become more or less sensitive to doxycycline and other antibiotics. You will also receive careful instructions on when and how to take the doxycycline. The total duration of your involvement will be around 180 days, including all visits and follow-up tests.
Potential risks and benefits
Locations (1)
- —Belgium
Common questions
What is antibiotic resistance?
Antibiotic resistance means that germs like bacteria and fungi no longer respond to the medicines designed to kill them. This can make infections harder to treat.
Why is this study only for men?
This particular study is focusing on men to understand how this specific preventative antibiotic treatment affects their bodies and the bacteria they carry. Future studies might include women.
What does 'pilot study' mean?
A pilot study is a small, early-stage research project. It helps researchers test out their methods and see if an idea is worth investigating further in a larger study.
Will I get tested for STIs in this study?
The information provided doesn't specify STI testing, but the study is about preventing STIs. This is a question to ask the study team directly.
What kind of samples will be collected?
The study mentions collecting samples from your gut (like stool samples) and your mouth (like swabs) to check the bacteria.
How to find out more
Always speak to your GP or specialist before deciding to take part in a study.
Discussion
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