Microscopy

A

A: Egg of Paragonimus westermani.  The average egg size is 85 µm by 53 µm (range: 68 to 118 µm by 39 to 67 µm).  They are yellow-brown, ovoidal or elongate, with a thick shell, and often asymmetrical with one end slightly flattened.  At the large end, the operculum is clearly visible.  The opposite (abopercular) end is thickened.  The eggs of P. westermani are excreted unembryonated.