Acute-Onset Eosinophilic Gastroenteritis and Ascites Secondary to Occult Toxocariasis.

Eosinophilic gastroenteritis is a rare entity, and although usually idiopathic, it may arise from gastrointestinal infections. We report a case of a 33-year-old woman from Vietnam presenting with acute abdominal pain, new-onset eosinophilic ascites, peripheral eosinophilia, and a positive Toxocara antibody. The patient had no recent international travel, known animal host contact, or other toxocariasis risk factors. She was treated with ivermectin and mebendazole with complete resolution of symptoms. This case emphasizes the consideration of a broad differential for eosinophilic ascites, including atypical presentations of infectious pathogens.