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, more than 200 million people are infected worldwide.In terms of impact this disease is second only to malaria as the most devastating parasitic disease.nfection with Schistosoma mansoni, S. haematobium, and S. japonicum causes illness in humans; less commonly, S. mekongi and S. intercalatum can cause disease. Although the worms that cause schistosomiasis are not found in the United States, more than 200 million people are infected worldwide.
A difficult question to answer, but the average sniper rifle in the  .300-.308 caliber can shoot anywhere between 100 and 800 yards. A  .50 caliber is estimated to effective â¦ at about 4 kilometers (2.5  miles).   US snipers are trained to engage targets at ranges up to 1000  meters.
Before each hunt, I advise clients that long shots of around 300 yards are very common on our hunting blocks. I then ask each client to check their rifles carefully to ensure that the rifle is both accurate and zeroed appropriately for the ranges we will encounter.he first is that a change in powder brand will dramatically alter groups, this is simply not true. If the rifle shoots 3â groups with H4831 powder at 60,000psi, it will shoot 3â groups with H4350 at 60,000psi. Altering seating depth by a few thou (.2mm) back and forth will not dramatically alter accuracy either.