Treatment for gastroenteritis in adults involves preventative measures, such as avoiding contaminated food and water and frequent hand-washings, according to Mayo Clinic. Because the condition is viral in nature, antibiotics are not effective, and using them may heighten the risk of creating strains of bacteria that are resistant to antibiotics.
Gastroenteritis, or the stomach flu, is a bacterial infection that occurs within the intestines, notes Mayo Clinic. It is characterized by diarrhea, abdominal cramps, nausea and vomiting. In some instances, symptoms include fever. People generally acquire gastroenteritis through contact with an infected person, eating contaminated food or ingesting infected water.