Differential Diagnosis for Sebastian
- Single most likely diagnosis
- Viral Gastroenteritis: This is the most likely diagnosis given the symptoms of diarrhea, abdominal pain, and the presence of similar symptoms in the family members, suggesting a contagious cause. The fact that a support worker with gastroenteritis may have transmitted the illness to the family further supports this diagnosis.
- Other Likely diagnoses
- Bacterial Gastroenteritis: Although less likely than viral gastroenteritis, bacterial causes such as Salmonella, Shigella, or Campylobacter could be considered, especially if the symptoms are severe or if there's a history of consuming undercooked food or contaminated water.
- Food Poisoning: Given Sebastian's lactose intolerance and the use of soy milk, it's less likely, but if there was an issue with the soy milk or other food items, it could be a consideration.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Intussusception: Although rare, intussusception is a condition where a part of the intestine slides into an adjacent part, potentially causing bowel obstruction. It's a medical emergency and can present with abdominal pain and diarrhea.
- Appendicitis: While less common in toddlers, appendicitis can present with abdominal pain and diarrhea. It's crucial to consider this diagnosis to avoid missing a surgical emergency.
- Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease or ulcerative colitis are less common in young children but can present with chronic diarrhea and abdominal pain.
- Rare diagnoses
- Toddler's Diarrhea: A condition characterized by chronic, non-bloody diarrhea in toddlers, often without other symptoms. It's a diagnosis of exclusion.
- Giardiasis: An intestinal infection caused by the Giardia parasite, which can lead to diarrhea and abdominal pain. It's less common but should be considered, especially if there's a history of exposure to contaminated water.