Gastroenteritis (often called "gastro") and food poisoning share similar symptoms, but they stem from different causes. Both involve inflammation of the gut but differ in origin and severity.
Gastroenteritis is inflammation of the stomach and intestines, usually caused by viruses like norovirus or rotavirus. Food poisoning results from consuming contaminated food or drinks, often due to bacteria like Salmonella or E. coli. While both cause nausea, vomiting, and diarrhea, gastroenteritis typically lasts longer (2-3 days vs. 1-2 days for food poisoning).
| Bacteria | Source | Incubation Period |
|---|---|---|
| Salmonella | Raw eggs, poultry, meat | 6-48 hours |
| E. coli | Undercooked ground beef, unpasteurized milk | 1-8 days |
| Listeria | Deli meats, soft cheeses, raw vegetables | 1-3 weeks |
Many assume all stomach bugs come from food. However, gastroenteritis often spreads through person-to-person contact or contaminated surfaces, not just food. For example, norovirus outbreaks frequently occur in crowded places like cruise ships or schools.
I once had a norovirus outbreak at work. The office was closed for deep cleaning, and everyone was advised to stay home until symptoms resolved. It spread faster than expected, showing how easily gastroenteritis can transmit.