Stomach Bug September 2024 Nz. Gastroenteritis can be caused by viruses, most commonly norovirus, bacteria and parasites. Its symptoms, which include nausea, chills, fever, vomiting and diarrhea, can start as early as 12 hours after infection but typically appear within one to two days, according to nicole mahealani.
The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite. Norovirus, commonly known as the winter vomiting bug (although it can strike at any time of year), is a stomach bug that causes sickness and diarrhoea.