MORPHOLOGY
Ash (1997)

EGGS

O. viverrini eggs
Image from Liver Flukes and Malignancy Website

Eggs measure 19-29 um long by 12-17 um wide. They have a knob at the abopercular end that may be prominent, inconspicuous, or absent

 

Opisthorchiasis felineus

 

Opisthorchis felineus adult anatomy
Image from Bogitsh, 1998

Opisthorchis felineus, adult worm
Image from Ash, 1997

 

Opisthorchis viverrini

Opisthorchis viverrini adult anatomy
Image from Bogitsh, 1998

Opisthorchis viverrini, adult worm
Image from Ash, 1997

 

The adult liver flukes measure from 7-12 mm in length. They have two testes lying one behind the other in the posterior portion of the body. The ovary is anterior to the testes and a uterus is coiled between the ovary and ventral sucker.