Schistosomiasis (bilharziasis) is a major human disease caused by three species of the genus Schistosoma, known collectively as blood flukes. Africa and western Asia (e.g., Iran, Iraq) are endemic centres for S. haematobium; S. mansoni also is found in these areas, as well as inâ¦
How Alcohol Damages Sperm. Alcohol can reduce the quantity of sperm a man produces (his sperm count) and the quality of that sperm. One way in which alcohol does this is by preventing the body from absorbing zinc in the normal way. Zinc is found in high quantities in sperm.
But many other factors can affect the number and health of sperm cells, including environmental causes, lifestyle choices and medical issues. Smoking, heavy drinking, drug use (including prescription drug use) or lack of exercise all contribute to diminished sperm count or poor sperm health.