Diseases can be spread in a variety of ways.
Contagious or communicable diseases are diseases that are spread from one
person to another, from one animal or plant to another, or from an animal
to a person. If a communicable disease spreads through an entire
community or communities it is called an epidemic.
Diseases are spread among humans in a variety of
ways. Shaking hands, sharing drinking glasses or eating utensils, or
standing close to each other while speaking, can spread communicable
diseases. Colds and flu can be spread by coughing and
sneezing. AIDS and other diseases are transmitted through direct
contact with body fluids, infected blood, or sexual contact.
Antibiotics are drugs that slow the growth of bacteria
or kill them without destroying the body's cells. Penicillin is an
antibiotic, which was discovered in 1928. It is used to treat strep
throat, pneumonia, and other bacterial diseases. Antibiotics are not
very helpful in fighting viruses. Viruses enter cells to attack them and
it is difficult to develop drugs that can destroy the virus without also
killing the cells. A vaccination can be given to strengthen the
body's immunity against certain viruses and germs. A vaccine is
administered by a shot, or can be taken orally. A vaccine is made
from small amounts of killed or weakened microbes of the disease it
causes. When the killed or weakened germs in the vaccine enter the
body, the immune system produces antibodies against the disease-causing
germ. In turn the antibodies multiple and remain in the blood to
attach any similar germs that might enter the body in the future.
Vaccines have been developed for measles, mumps, polio, influenza, and
Diseases that are not contagious and cannot be spread
are called non-communicable diseases. Smoking can lead to lung
disease and even cancer in the lungs and other parts of the body.
The sun's ultraviolet rays have been known to cause skin cancer. A
lack of vitamin C can cause bleeding gums and exhaustion. Too much
fat and cholesterol in the diet, along with a lack of vegetables can lead
to heart disease and cancer. Some non-communicable diseases are
passed from parent to child through their genes. This is known as a hereditary
disease. Hemophilia is an example of this. It is a disease in
which the blood does not clot correctly.
Directions: Answer the questions about diseases
and the treatment and prevention of them.
diseases are diseases that are spread from one person to another, from one
animal or plant to another, or from and animal to a person.
are not contagious and cannot be spread.
occurs if a communicable disease spreads through an entire
community or communities.
drugs that slow the growth of bacteria or kill them without destroying the
discovered in 1928 is used to treat strep throat, pneumonia, and other
is used to fight viruses. It is administered through
a shot or orally.
Indicate whether the disease is communicable or
non-communicable. Use C for communicable and NC for
disease is passed from parent to child through their genes.
AIDS is transmitted through direct
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