Parasites Cause Diseases
Altogether there are more than 1700 known human diseases. Many of them are not serious. A few are serious, and widespread; they are responsible for millions of deaths each year. Among them are such diseases as pneumonia, influenza, tuberculosis, malaria, and yellow fever. Man must always be on guard against them.
Parasites are the causes of much human disease and suffering. Several hundred kinds are able to enter the human body and live in it. They may then be spread from one person to another. That is why the diseases which they cause are said to be communicable.
Disease Bacteria
Bacteria make up one large group of such Parasites. As you know, they are microscopic plant which cannot make their own food. Parasite bacteria find the human body a good place in which to live. They multiply rapidly. Some kinds give off poisons in the body, which make us ill. Others attack and destroy body tissues, causing sickness in that way.
Certain kinds of microscopic plants live on the skin rather than in the body. Parasites of this type cause the skin disease known as ringworm; athlete’s foot is another disease caused by these parasites. Usually these may lead to dangerous infections. Continue reading
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