The winter malaise is caused by calicivirus and spreads very easily. If you get sick, it is often enough to rest and drink properly. You usually get better within one to three days. A good way to prevent infection is to wash your hands thoroughly with soap and water.
Tourist diarrhea is a collective name for stomach upset that you can get while traveling. There is a greater risk of getting tourist diarrhea in countries with poor water treatment. The disease often goes away within three to four days. It is important that you drink extra during the time, especially in hot weather.
Salmonella is a stomach disease. It is disseminated via beverages and food that have been handled incorrectly. Most people get mild problems that quickly go away. You may have high fever and diarrhea.
Cholera is a diarrheal disease caused by a bacterium. Cholera is spread among other things with contaminated water or food. The disease is usually found in countries with poorly functioning water and wastewater treatment.
An intestinal pocket is a bulge in the mucous membrane of the colon. It is common to have bowel pockets and usually they are not noticed. An intestinal pocket can become inflamed, and you then get stomach and fever. Inflammation often goes away without treatment, but if you become very ill, you may need to receive hospital care.
Dysentery, or shigella, is an infectious gut infection caused by bacteria.
Amoeba infection is caused by a parasite, a so-called amoeba, which is mainly spread through contaminated water and food. The infection can cause diarrhea which can sometimes be bloody. Amöban is more common outside Europe. Seek care if you suspect you have been infected.