Overview
Travel-related infections are infections linked to trips within your country or abroad. They can include stomach infections, mosquito-borne illnesses, respiratory infections, skin infections, and diseases spread through contaminated water or animal contact. The exact risk varies widely by destination, season, activities, and local public health conditions.
Key Symptoms
Symptoms depend on the infection but commonly include fever, diarrhea, vomiting, stomach cramps, cough, sore throat, rash, headache, body aches, or unusual tiredness. Some infections cause jaundice, trouble breathing, dehydration, or confusion. Tell a healthcare professional about any recent travel, even if symptoms seem mild at first.
Causes and Risk Factors
Travel-related infections may be caused by viruses, bacteria, parasites, or fungi. Common exposures include unsafe food or drinking water, insect bites such as mosquitoes or ticks, swimming in contaminated water, poor sanitation, crowded indoor settings, sexual contact, and animal bites or scratches. Risk may be higher for infants, older adults, pregnant people, and people with weakened immune systems or chronic medical conditions.
Who Is Affected
Anyone who travels can be affected, including people visiting friends and relatives, business travelers, tourists, students, aid workers, and people on cruises or group tours. People may be at higher risk if they stay for long periods, travel to rural or outbreak areas, camp outdoors, or do not receive destination-specific health advice before leaving. People returning home may not realize that an illness is related to travel.
Prevention
Before travel, check official health advice for your destination and ask a healthcare professional whether vaccines or other preventive measures are recommended. Reduce risk by choosing safer food and water, washing hands often, avoiding insect bites with protective clothing and repellents, practicing safer sex, and avoiding contact with wild or sick animals. Follow local public health guidance, including any outbreak alerts.
Diagnosis and Tests
Diagnosis starts with a travel history, including destinations, dates, activities, foods eaten, insect bites, freshwater exposure, and animal contact. A clinician may use blood tests, stool tests, urine tests, throat or nasal swabs, skin tests, or imaging depending on symptoms. Bringing a list of countries visited and your vaccination history can help.
Treatment Categories
Treatment depends on the cause and can include fluids and rest, medicines that target bacteria or parasites, and supportive care for symptoms such as fever or dehydration. Some infections need prompt hospital care, especially if they affect breathing, cause severe diarrhea, or lead to confusion or signs of organ problems. Do not rely on self-treatment alone if you have significant symptoms after travel.
When to Seek Medical Care
Seek medical care if you develop fever, persistent diarrhea, vomiting, rash, jaundice, breathing symptoms, urinary symptoms, or unusual weakness during travel or after returning home. Get care sooner if you are pregnant, immunocompromised, older, or caring for a young child with symptoms. Always mention where and when you traveled.
When It May Be an Emergency
Get urgent help right away for trouble breathing, chest pain, severe dehydration, fainting, confusion, seizures, a stiff neck, blue lips, severe allergic reactions, or high fever with worsening illness after travel. Urgent evaluation is also needed for severe abdominal pain, bloody diarrhea, signs of shock, or symptoms after an animal bite in a rabies-risk area. Emergency care is especially important after travel to a malaria-risk area if fever develops.