the table explains how long it takes for symptoms of different germs to appear and how long they usually last campylobacter symptoms start in two to five days and last up to ten days e coli symptoms start in two to five days and last five to seven days listeria symptoms can start within twenty four hours and last one to three days norovirus symptoms start in twelve hours to two days and last one to three days salmonella symptoms start in six hours to six days and last four to seven days vibrio symptoms start in twelve hours to two days and last one to seven days