What is the primary diagnosis for a child presenting with fever, anorexia, vomiting, headache, abdominal pain, dark urine, and jaundice after recent travel?

The primary diagnosis for a child presenting with fever, anorexia, vomiting, headache, abdominal pain, dark urine, and jaundice, especially after recent travel, aligns with Hepatitis A. Hepatitis A is a viral infection that is commonly transmitted through the ingestion of contaminated food or water, which makes it particularly relevant in the context of travel, especially to areas where sanitation might be compromised.

The symptoms described in this scenario—fever, anorexia, vomiting, abdominal pain, dark urine, and jaundice—are consistent with acute viral hepatitis, and Hepatitis A is known for causing these symptoms acutely. The recent travel history suggests a potential exposure to the virus, as Hepatitis A outbreaks are often reported in regions with inadequate sanitation.

In contrast, while Hepatitis B and C also cause liver inflammation with overlapping symptoms, they are typically associated with different modes of transmission, such as sexual contact or blood exposure, rather than food or water. Neonatal hepatitis, on the other hand, occurs in newborns and is usually related to infections or metabolic disorders present at birth, and thus would not apply in the case of a child who has traveled and presents with these symptomatology.