Clonorchis sinensis egg.
These are small operculated eggs. Size is 27 to 35 µm by 11 to 20 µm. The operculum, at the smaller end of the egg, is convex and rests on a visible "shoulder". At the opposite (larger, abopercular) end, a small knob or hook-like protrusion is often visible (as is the case here). The miracidium is visible inside the egg.
Numerous gold-colored small ova are seen in the bile (unstained preparation). Note their small size (30 μm) and the operculum.
Surgically resected liver abscess containing numerous small-sized ova (66 y-o female, HE). The small size of the ova strongly suggests clonorchiasis, but the microscopic obsrevation of the ova in the bile or stool and/or serological testing are requested for the definite diagnosis.
Section of liver showing
multiple adult form
of Clonorchis sinesis
in a distal biliary duct.
Pathology of gall bladder infected with Clonorchis.
Similar pathology would be observed with Opisthorchis infection