Intestinal Strongyloides causing peritoneal eosinophilia in peritoneal dialysis

A 59-year-old Laotian male with a past medical history of multiple myeloma on peritoneal dialysis (PD) presented with abdominal pain and peritoneal eosinophilia. He was treated empirically for bacterial peritonitis and discharged although his PD fluid did not isolate any pathogens. He soon developed a partial small bowel obstruction and his serum Strongyloides IgG was positive. After treatment with ivermectin, stool microscopic examination showed Strongyloides stercoralis larvae. This case illustrates that the differential diagnosis of peritoneal eosinophilia should include typical and atypical infections in addition to an allergic or hypersensitivity type reaction.