By Anna Wright
Dailymail.Com
A slimy pest is plaguing Louisiana - causing utter destruction for crawfish and rice harvesters.
The apple snail, native to South America, is an invasive species that carries a parasite called rat lungworm, which can be fatal to humans and devastating to crops.
Rat lungworm attacks the brain and can cause meningitis. The snails are also known to be carriers of harmful blood and intestinal flukes.