You don't confirm whether it was the cull ewe that was condemned? If it was and you were concerned about her did your vet attend?
Abattoir vets are generally from Europe and their English isn't always great so you might be better to ask the abattoir for the vet check information.
The vast majority of sheep culled have been into contact with fluke at some time and some areas are worse than others. Our abattoir told me that. Generally, only the liver is condemned .
As Rosemary says check with your vet about fluke levels in your area and about a health plan for your sheep.