Significant Leukocytosis with Hypereosinophilia Secondary to in Adult: A Case Report.

Eosinophilic leukocytosis can be attributed to a number of clinical conditions such as parasitic infection, allergies, and neoplasms. Parasitic infection is the main cause of eosinophilia; however, a marked leukocytosis with hypereosinophilia secondary to in adults has not been previously reported. We describe a case of a 39-year-old man who presented with fever and diarrhea.