The scientific name of meningeal worm is Parelaphostrongylus tenuis. I
have done a lot of work with a close relative, Elaphostrongylus cervi,
which is a parasite of red deer and is close relatives. The larval
stages of both these parasites develop in a wide variety of slugs and
snails, but mainly terresrial ones. The larvae will also remain
infective in dead slugs and snails. There will be snails present even
though your soil is sandy. In addition, slugs and snails could occur in
any hay you bring in as stock feed.
Hope this helps
Dr Paul Mason
Consultant Parasitologist
