Are all wild animals usually full of parasitic worms?

[astro]

When people try to domesticate feral cat and dogs and take them for a vet check up it seems that they are often full of various parasitic worms and have to be de-wormed. Is this natural for all wild animals? Are most wild animals chock full of worms?

[SuperAbe]

When people try to domesticate feral cat and dogs and take them for a vet check up it seems that they are often full of various parasitic worms and have to be de-wormed. Is this natural for all wild animals? Are most wild animals chock full of worms?

Absolutely - and most humans on the planet are too (first hit (http://www.scientificamerican.com/article.cfm?id=worms-human-parasites) searching for "human parasitic worm load" - not for the queasy). For a full treatise, see Carl Zimmer's Parasite Rex (http://www.amazon.com/Parasite-Rex-New-Epilogue-Dangerous/dp/074320011X).