Hi there,
I'm having a bad run of imperfect livers and parasite infections.
First up was Coenurosis which after some research I found that yes we can contract this infection and it is potentially fatal although very very rare. only 4 cases since 1983. the cyst itself dropped from beneath the back muscle tissue.
check it out: https://www.google.co.uk/search?q=coenurosis&espv=2&biw=1366&bih=677&source=lnms&tbm=isch&sa=X&ved=0CAYQ_AUoAWoVChMIwuWn6e6PxwIVSbYUCh3fqQwJ#imgrc=F7yTG637oV2JAM%3A
However, the last couple of livers I've come across have displayed signs of what I think may be coccidiosis which I think means that the meat is still ok to eat. I've attchaed a couple of images if anyone cares to comment. I'm hoping that an old had will say "oh yeah that's all it is its fine get it down yer!". I absolutely hate having to waste an animal. I know its never truly a waste, but I only hunt for food.
cheers