Gastrointestinal Infections** are illnesses caused by pathogens such as bacteria, viruses, or parasites that infect the digestive system, leading to symptoms like diarrhea, vomiting, abdominal cramps, and nausea. Common culprits include *Salmonella*, *Norovirus*, *Campylobacter*, and *Rotavirus*. These infections are often transmitted through contaminated food, water, or direct contact with infected individuals. Treatment typically focuses on hydration and symptom management, while severe cases may require antibiotics or antiviral medications. Preventive measures include proper hygiene, safe food handling, and vaccination in some cases.