Stomach Bug 2024 Symptoms. Gastroenteritis can be caused by viruses, most commonly norovirus, bacteria and parasites. According to the oklahoma state department of health, symptoms of the norovirus can last one to three days and include:
โ norovirus, sometimes referred to as a stomach flu or stomach bug, is a common virus that’s highly contagious and spreads through tiny particles of feces or. โ what are the symptoms of stomach flu?