Snails kill 200,000 people a year

I think you already know that the most dangerous animal in the animal kingdom is Mosquito. As you think who is the 2nd most dangerous animal in the world. Believe me, it is Snails. 

Freshwater Snail is the 2nd most dangerous animal in the Earth who kills more than 200000 people for a year. (it's more than the number of deaths caused by lion, tigers, and sharks...). As Malaria by mosquitos, these freshwater snails will cause a disease named Schistosomiasis. Actually, Schistosomiasis is a type of Parasite. First, it will infect the snail by polluted freshwater and then it infects the human body by contacting these snails through the water bodies.

More about Schistosomiasis:

Schistosomiasis, also known as bilharzia, is a disease caused by parasitic worms. Although the worms that cause schistosomiasis are not found in the United States,  people are infected worldwide. In terms of impact, this disease is second only to malaria as the most devastating parasitic disease. Schistosomiasis is considered one of the neglected tropical diseases (NTDs).
The parasites that cause schistosomiasis live in certain types of freshwater snails. The infectious form of the parasite, known as cercariae, emerge from the snail into the water. You can become infected when your skin comes in contact with contaminated freshwater. Most human infections are caused by Schistosoma mansoni, S. haematobium, or S. japonicum.

Image: Left: Biomphalaria sp., the intermediate host for S. mansoni. Right: Bulinus sp., the intermediate host for S. haematobium and S. intercalatum. Center: Adults of S. mansoni. The thin female resides in the gynecophoral canal of the thicker male. Credit: DPDx