"It is a type of salmonella (a bacterium that causes diarrhea), which rarely occurs in the Czech Republic," said Olga Štorkánová, director of the antiepidemic department.
Hygienists have yet to discover where the disease comes from or the method of transmission.
"There has been an intense search for the origin of the disease and the route of transmission, including the inspection of the fast food establishment in Ústí nad Labem and the sampling of suspect foods for laboratory tests," added Štorkánová.
Salmonella are intestinal bacteria that enter the body through the mouth with food or water. Most species in 8-10 hours cause nausea to vomit bowel problems with severe diarrhea, headache, abdominal pain and a temperature that can reach 39-40 degrees Celsius.
Salmonella in the digestive tract survives for a long time and can be excreted three to six weeks after the disease. At that time, they can infect other people. Complete hygiene is therefore essential.
One is more easily infected by ingesting poorly heat-treated foods.