It is the knowledge pertaining to life. The discovery of a group of organisms called "Viruses" appears to afford a clue to the origin of life on the earth. They are strange organisms which ordinarily behave like life less chemical compounds, but given suitable environment they rapidly multiply reproducing them selves. Some viruses cause deadly diseases a man has polio-mellitus, rabies, influenza, small-pox etc. And some plant viruses devastate crops over large areas. Single cell organisms not only multiply but respond to stimulus were the next in the chain of evolution of living beings. Such simple forms underwent successive changes during the course of evolution producing more and more complex forms, and finally giving rise to two different major divisions i.e. Plants (flora) and animals (fauna). Bacteria: These are the smallest and simplest of all organisms and are devoid of chlorophyll. They exist under all conditions of life and are of tremendous consequences to man, as some of them are beneficial and some harmful to him. They thrive on living on dead organic matter. All the unicellular organisms reproduce by dividing themselves into two. Unicellular plant organisms include yeast bacteria etc. Yeast is found in fruit juices, sugar solution etc.
They are both tiny microbes
they both can cause infections and diseases - bad bacteria
they both can cause infections and diseases - bad bacteria
Viruses and bacteria have one thing in common that all living things have
in common: A desire to produce offspring and continue as a species. All
viruses are parasites: They must enter into a cell and take over the
cell's machinery to produce more virus. Most bacteria, on the other hand,
are fully capable on their own to produce more bacteria. This isn't always
true - some bacteria require a host in some form or another in order to
produce more bacteria.
Viruses cause disease by killing the cells they infect; the resulting
damage causes an inflammatory response which leads to the fever and other
symptoms typically associated with infections. Viruses like Herpes or HIV
can cause an initial infection and then go "quiet", hiding in the body for
years before re-emerging to cause disease.
Some bacteria can infect host cells and kill cells in a manner similar to
that of viruses. Still other bacteria produce toxins that kill host cells.
Some bacteria do both! The body's response to cell death caused by
bacteria is similar to that of viruses - release of histamines,
interferons and other molecules that generate an inflammatory response,
leading to fever and other symptoms.
You may see the beginnings of a common thread here. On the whole, the
body's initial response to bacterial and viral infections is very similar,
regardless of whether it is a bacteria or a virus. This is why it can be
very difficult for a doctor to ascertain whether a particular illness is
bacterial or viral in origin simply by description of the patient's
symptoms upon entrance into the clinic or hospital. Typically the doctor
will rely upon the description of symptoms and the location of the
infection to make a determination of illness. Most respiratory illnesses,
for example, are caused by viruses. But not all! If the list of symptoms
doesn't fit the expected profile, the doctor might order a panel of tests
including blood cultures, complete blood counts (CBCs) and others.
in common: A desire to produce offspring and continue as a species. All
viruses are parasites: They must enter into a cell and take over the
cell's machinery to produce more virus. Most bacteria, on the other hand,
are fully capable on their own to produce more bacteria. This isn't always
true - some bacteria require a host in some form or another in order to
produce more bacteria.
Viruses cause disease by killing the cells they infect; the resulting
damage causes an inflammatory response which leads to the fever and other
symptoms typically associated with infections. Viruses like Herpes or HIV
can cause an initial infection and then go "quiet", hiding in the body for
years before re-emerging to cause disease.
Some bacteria can infect host cells and kill cells in a manner similar to
that of viruses. Still other bacteria produce toxins that kill host cells.
Some bacteria do both! The body's response to cell death caused by
bacteria is similar to that of viruses - release of histamines,
interferons and other molecules that generate an inflammatory response,
leading to fever and other symptoms.
You may see the beginnings of a common thread here. On the whole, the
body's initial response to bacterial and viral infections is very similar,
regardless of whether it is a bacteria or a virus. This is why it can be
very difficult for a doctor to ascertain whether a particular illness is
bacterial or viral in origin simply by description of the patient's
symptoms upon entrance into the clinic or hospital. Typically the doctor
will rely upon the description of symptoms and the location of the
infection to make a determination of illness. Most respiratory illnesses,
for example, are caused by viruses. But not all! If the list of symptoms
doesn't fit the expected profile, the doctor might order a panel of tests
including blood cultures, complete blood counts (CBCs) and others.
You can get rid of bacteria, but viruses can never be cured