Table 2. Diagnosis of asymptomatic eosinophilia.

Eosinophilia per µL blood	Recommended screening program	Special features
≤1500	3 × stool test for worm eggs, if negative:	If results negative: re-test after 3 months
	Strongyloides and schistosome antibodies in serum (if patient from schistosomiasis-endemic region; see box 1)
>1500	3 x stool test for worm eggs,	If patient from sub-Saharan Africa: additionally Filaria antibodies in serum; if results negative: refer to specialist in tropical medicine
	1 × Baermann stool test for Strongyloides stercoralis larvae; Strongyloides, schistosome (if patient from schistosomiasis-endemic region; see box 1), Fasciola (if patient not from schistosomiasis-endemic region) and cysticercal anti-bodies in serum; ECG, chest X-ray, abdominal sonography