Lovely work Bill!
john in hull, nematodes are microscopic unsegmented worms. I spent many years extracting them from soil and plant material and fiddling around with them under the microscope, like cutting their bums off and other neat stuff. Thankfully, I worked mostly with plant parasites or ones in association with insects and not with animal parasites, like the ones found in pork. You may never want to chew your fingernails again if you have seen some of the stuff that I have looked at.
A personal friend of Dracula are you Dave?