Antibiotic-Resistant Infections and Medical Tourism: Why Your Travel History Matters

Why a few sentences about your trip can matter so much

Most infections after surgery are caused by familiar bacteria, and most respond to the antibiotics clinicians reach for first. The problem is the minority of cases where the organism is unusual or resistant to standard drugs. In those cases, the first antibiotic may not work. Time spent on the wrong treatment is time an infection has to progress.

A clinician at home has no way of knowing you were treated overseas unless you tell them. A healed incision or a short hospital stay in another country leaves no visible trace. A clinician who doesn't know you had care abroad has nothing to prompt the extra questions, cultures or screening that the situation may call for.

This is why the CDC Yellow Book (2026 edition) tells US clinicians to obtain an explicit travel history from patients, including any medical care received abroad. The guidance is written for clinicians, but it only works if patients give the history clearly and early.

What "resistant" means in practice

An antibiotic-resistant organism is one that keeps growing despite drugs that would normally kill it. Resistance isn't one thing. It ranges from bacteria that dodge one common antibiotic to organisms with very few treatment options left.

Organisms CDC names in the medical-tourism context

• Carbapenem-resistant Enterobacterales (CRE). The CDC Yellow Book names CRE among resistant organisms that appear to be more common in some countries where US residents travel for medical tourism. Carbapenems are often used against bacteria that already resist other drugs. Per CDC's CRE overview (reviewed December 2025), CRE resist most antibiotics, including carbapenems.
• Candida auris. A fungus also named in the Yellow Book. CDC asks clinicians to report suspected cases.
• Nontuberculous mycobacteria (NTM). The Yellow Book describes surgical-site infections caused by NTM in medical tourists, including a cosmetic-surgery outbreak linked to the Dominican Republic. NTM behave differently from ordinary wound bacteria. We cover them separately in our guide to NTM after cosmetic surgery abroad.

None of this means care in any particular country is unsafe. Resistant organisms exist in hospitals everywhere, including in the United States. CDC's CRE page reports about 12,700 US infections and more than 1,100 deaths in 2020. It also reports that yearly CRE incidence rose 18% from 2019 to 2023. The point is narrower: a clinician who knows where and when you received care can judge whether those organisms deserve a place on their list.

Carrying an organism is not the same as being infected

CDC's CRE overview makes a distinction that's worth understanding before you ever need it. People can carry CRE in the gut or on the skin without being sick. This is called colonization. CRE spread mainly from person to person through contaminated hands, wounds or stool, and through contaminated medical equipment. Someone who is colonized can pass the organism on without knowing it.

That's the reason for one specific recommendation in the Yellow Book. Patients who had an overnight stay in a healthcare facility outside the United States within the previous six months should be screened for CRE when they're admitted. The Yellow Book notes that this admission screening is available free through CDC's Antibiotic Resistance Laboratory Network.

If you're admitted to a US hospital within six months of an overnight stay at a clinic or hospital abroad, you may be asked for a swab. You might also be placed on contact precautions, such as staff wearing gowns and gloves, until results come back. This isn't a judgment about you or the place you were treated. It's routine infection control to protect other patients, many of whom are far more vulnerable than a healthy elective-surgery patient.

What to tell a clinician, and when

Say it at the start, not as an afterthought. "I had surgery in another country" should be one of the first things you tell triage staff, urgent care or your own doctor. That applies whether the problem is a wound issue, a fever, a urinary infection or something that seems unrelated.

Keep this on your phone and on paper. A one-page summary in plain language, with dates, saves a stressed clinician from piecing it together in an emergency department. If you're putting a full set of documents together, our guide to records to take home after treatment abroad lists what to collect before you fly.

Why you shouldn't hide the trip

Some patients play down overseas treatment because they expect criticism. Others don't think it's relevant. Either way, leaving it out can steer the clinician toward the wrong first assumption. What you were exposed to is clinical information, the same as an allergy or a medication list. It's what can push a clinician to send a culture before starting antibiotics instead of treating on a best guess.

The same applies if the overseas team prescribed antibiotics "just in case" or gave you a course to take home. Tell the clinician exactly what you took and when. Antibiotics taken before a culture is collected can make the culture harder to read.

The leftover-antibiotics trap

A common shortcut is to start an antibiotic left over from the trip when a wound looks red. This creates two problems. The drug may not cover the organism involved, especially if it's resistant or unusual. It can also suppress bacteria just enough to make a later culture less informative, while the infection keeps going.

CDC's CRE guidance tells patients to take antibiotics exactly as prescribed. Treat that as a reason to get a new problem assessed rather than reaching into your travel bag. If you can't be seen quickly, call your home clinician or the overseas surgeon for advice. Don't start medication on your own.

What you can ask for while you're still abroad

If an infection is suspected before you leave, ask the treating team:

• Was a culture taken? What did it grow, and which antibiotics was the organism tested against? This is called the susceptibility report.
• Which antibiotic did you start, at what dose, and for how long?
• Can I have the lab reports themselves, not only a summary?
• If the culture is still pending when I fly, how will I get the final result?

A susceptibility report from abroad can save days at home, because it tells the next clinician which drugs the organism resisted at the time. Ask for it in English if possible. The Yellow Book advises requesting overseas records in English and sharing them with any follow-up clinicians.

When the trip matters for months, not days

The six-month CRE screening window shows that your travel history keeps mattering after your incision heals. If you're admitted to hospital, have another procedure, or develop a urinary or bloodstream infection in that window, mention the overseas care again. Do this even if the new problem seems unrelated to the original surgery.

Public health may get involved, and that is useful

The Yellow Book asks clinicians to notify state and local public health when they identify infections associated with medical tourism, and to report suspected CRE or C. auris. Being part of a public-health report can feel intrusive. These reports are how clusters linked to a single facility get spotted, and how other patients get warned. If an investigator contacts you, the details from your travel-history script are exactly what they'll need.

For what you can ask a facility about infection prevention before you book, see what patients can actually check before surgery. This article is about the other end of the trip: making sure the information follows you home.