Africa is a kind of foreign invasive species, the food is very large, eat everything, in the country is classified as a pest, it is not poisonous, but most of the African large snails contain parasites (Guangzhou tubular nematode), this kind of parasites can be parasitized by both humans and animals, so the African snails can be eaten, but it is not recommended to eat.
African snails are like the one pictured above, with yellowish-brown markings, a long body (said to be 20 centimeters long), a love of rain, and a preference for hotter places, and I've never seen this before in my life in northern China, anyway. The key is that it eats everything, in the outdoors of the environment is very strong, the legendary "field killers" is this stuff, and very hungry, cement it dares to eat. This goods from the East African region out, now almost global many countries and regions have been it "invasion". After the African snail arrived in Guangzhou, for the delicious Cantonese people, how can it square over it. So, the African snail is edible, and is not poisonous.