Outbreak at Sea

The scenario begins with the evaluation of multiple patients, including a 6-year-old boy, a 21-year-old marathon runner, and a 70-year-old man, all presenting with symptoms of nausea, vomiting, and diarrhea. As the senior medical officer, the physician must recognize the viral gastroenteritis outbreak and take steps to manage the rapidly spreading illness with limited resources, all while on a ship far from shore. Key teaching points include the differential diagnosis of gastrointestinal symptoms across various age groups, the management of dehydration and electrolyte imbalance, and the implementation of infection control measures. The scenario emphasizes the need for coordinated public health action in a confined, resource-limited setting, while also navigating the captain’s decision not to turn the ship around, as no patients are critically ill.