The Swedish Institute for Infectious Disease Control (Smittskyddsinstitutet, SMI) has list the countries where travellers are most likely to be affected by diarrhea and vomiting, according to newspaper Dagens Nyheter.
Top of the list is India, followed by Indonesia. Other countries include Morocco, Thailand, Tunisia, Egypt, Turkey and Bulgaria. In addition, there is also a risk of Swedish tourists getting sick in Greece, France, Portugal and Spain, although the odds are not as high.
The most common stomach bacteria are campylobacter in the water and those from chicken, pork and lamb meat, as well as shigella in vegetables and salmonella in eggs and chicken meat.
In India, the risk for campylobacter is high. Salmonella is also very common there, as well as in Indonesia, Thailand, Egypt, Tunisia, Morocco, Turkey and Bulgaria.
Shigella, which causes stomach pain, diarrhea and bloody stool, is most common in India and Egypt.
Other infections that tourists are at risk of contracting include hepatitis A and B in Egypt, the rest of Africa, Turkey and the Middle East, dengue fever in Thailand and South America and malaria, which is prevalent across large parts of the world.