Dr. Sameer Yousof Rizg is a Consultant Family Medicine Physician at King Abdul-Aziz Medical City in Jeddah, Saudi Arabia, with more than 10 years of experience in clinical practice, medical education, clinical training, and healthcare quality improvement. He holds a Bachelor of Medicine and Surgery from King Abdul Aziz University and is certified by both the Saudi Board and Arab Board in Family Medicine. Dr. Rizg has extensive experience in primary healthcare, acute and chronic disease management, emergency and urgent care, and COVID-19 clinical response, including service through a national healthcare consultation hotline. He has also contributed to Hajj medical missions, providing clinical and ambulance acute care support in Mina and Arafat. In addition to his clinical responsibilities, Dr. Rizg has demonstrated leadership in healthcare quality and administration, including serving as a Quality Manager and Deputy Manager at Bahara Primary Health Care. He has contributed to quality improvement initiatives aligned with CBAHI and JCI standards and has participated in various hospital and regional committees. Dr. Rizg is actively involved in medical education and training. He provides clinical teaching for medical students, interns, and Family Medicine residents, serves as an OSCE examiner for Saudi and Arab Board examinations, mentors Family Medicine residents, and organizes continuing medical education activities. His professional interests also include research and community healthcare. He has contributed to research on occupational stress, depression among medical students, the impact of COVID-19 on primary care, sexual health encounters in Family Medicine, and other clinical topics. He has also participated in community health initiatives, including diabetes awareness and COVID-19 education campaigns. Dr. Rizg has presented at national and international conferences and holds additional certifications including Advanced Trauma Life Support, tobacco cessation specialist certification, and Saudi Commission for Health Specialties trainer certification. His professional interests encompass Family Medicine, primary healthcare, medical education, clinical quality improvement, preventive medicine, and community health.

Title: Gastroentritis and its effect locally and globally - Abstarct:  Gastroenteritis is one of the leading causes of morbidity and mortality worldwide, particularly among children under five years of age, older adults, and immunocompromised individuals. It is characterized by inflammation of the stomach and intestines, resulting in diarrhea, vomiting, abdominal pain, and dehydration. Viral pathogens such as norovirus and rotavirus are the most common causes, while bacterial and parasitic infections also contribute significantly. Despite improvements in sanitation and vaccination, gastroenteritis continues to pose a major public health challenge, especially in low- and middle-income countries. Globally, gastroenteritis accounts for millions of illnesses and hundreds of thousands of deaths annually, with the highest burden occurring in regions with limited access to clean water, adequate sanitation, and healthcare services. In Saudi Arabia, gastroenteritis remains a common reason for primary care and emergency department visits. Foodborne outbreaks, seasonal viral infections, international travel, and mass gatherings such as Hajj and Umrah contribute to disease transmission. National public health measures, including food safety regulations, improved surveillance, vaccination against rotavirus, and public health education, have helped reduce severe disease, particularly among children.