" No matter if the gastroenteritis is viral or bacteria, the symptoms are very similar. The major difference is how long they last. Bacterial is more likely to last a few more days, and symptoms may be more severe. Gastroenteritis only lasts a few days, but if your symptoms last longer than 5, be sure to meet with a physician. AFC Urgent Care Lyndhurst can help give patients recommended treatment options to help them feel their ...