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Viruses (biological)

A virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses display a wide diversity of shapes and sizes, called morphologies. Generally viruses are much smaller than bacteria. Most viruses that have been studied have a diameter between 10 and 300 nanometres.

1,710 Questions

What causes the common cold rabies AIDS and the flu?

viruses.

All four of those Infectious Diseases are caused by viruses. Human Immunodeficiency Virus (HIV) is the name of the virus that causes AIDS. The common cold is usually caused by the rhinovirus (up to 40% of colds), or Coronaviruses (about 20%), but there are more than 200 viruses that can cause the common cold. Viruses also cause the flu, there are three types of human influenza viruses, Types A, B and C and many subtypes and strains of each of those types.

Do viruses have any known predators?

Since viruses are nonliving, they have no known predators.

What is the part of that blood is attacked when you have dengue?

The platelets are destroyed. These are necessary for clotting. If they are too low, you can hemorrhage to death.

What is the herpes type viruses called?

The types of herpes viruses are numbers; for example type 1 is oral herpes and type 2 is genital herpes.

Can a goose have rabies?

No geese can not get rabies. Only mammals are built to be able to get rabies.

Do Active viruses enter a cell and immediatley begin to multiply?

The easiest way to understand how viruses replicate is to study the life cycles of viruses called bacteriophages (bacteria eaters). Bacteriophages replicate by either a lytic cycle or a lysogenic cycle. The difference in these two cycles is that the cell dies at the end of the lytic cycle or the cell remains in the lysogenic cycle. The virus remains "hidden".

What system includes specialized cells that help fight bacteria and viruses?

The immune system has special cells that help the body to fight off any invaders.

What are Protein coats?

A virus has a protein coat that covers it's genetic center. It acts as a protection but also it can match certain proteins it has with ones on the host cell. Thereby "unlocking" the door.

Are viruses fatal to children and the elderly?

They can be, depending on the type of virus and resulting symptoms, as well as depending on whether there are other complications or secondary infections caused by other organisms. Often children and the elderly have poorly functioning immune systems which leaves them more vulnerable for contracting and having complications from viral infections. Each year tens of thousands of patients age 65 and over die from the flu in the US.

Why is the only function of the virus to create a new virus?

Survival and reproduction are important to any organism, even viruses, who are not considered biotic (living). Viruses just have less necessary life functions than other large animals you may know of.

What help relieve the symptoms of a viral infection?

Over-the-counter pain relievers such as acetaminophen are often recommended.

Why can living organisms infected with a virus still appear healthy?

It can take some time for the effects to appear. The virus has to highjack the host cells and get that cell to make more viruses. It all takes time for this to happen. This one reason we say we don't feel well and that we may becoming down with something.

What virus causes bleeding spots?

Bleeding spots can be caused by various viral infections, with one notable example being the Ebola virus. Ebola is known for causing severe hemorrhagic fever, which leads to bleeding both internally and externally. Other viruses, such as dengue virus and Marburg virus, can also cause bleeding manifestations. These conditions typically involve severe illness and require medical attention.

How the US government handled the Ebola virus?

When the Ebola virus was on the verge of an outbreak in washington, the US government sent the United States Army Medical Research of Infecsious Diseases to contain it. The book "The Hot Zone" By Richard Preston describes this very well.

How do you recover from the flu fast?

A fever is your body's way of cooking an infection out of you. You can handle heat much better than bacteria and viruses can. It is a way of de-toxing. Sweat, even lots of sweat is very good for you! It gets all kinds of toxins out of the body and not just bacteria and viruses either. This idea that all fevers must be brought down is a way that drug companies have of selling more medication to make money. Best to be grateful your body can run a fever and ride it out. You don't want infections to do more damage. The sooner an infection is cooked out of you the better. Let your immune system do its job! Think of it as a free sauna! Same with diarrhea. If there is something in your gut that needs to come out, your body knows this. Why, oh why, would you want poisons to stay INSIDE OF YOU?! Let what is making you sick get out of you! You are getting a free colon cleanse! It is your body trying to de-tox and it is doing for free what people pay lots of money to do!

Do viruses evolve?

Yes, viruses evolve over time. They will usually mutate into a stronger virus. When viruses face something new that could stop them, they usually mutate.

Does virus use evolution?

Evolution is the change in allele frequency over time in a population of organisms.

Viruses do have DNA and RNA, so the can change allele frequency over time and have a form of gene pool, though they are not organisms in the general sense of " living organisms. "

Loosely, one can say that a virus evolves.

Is it true or false that Leeuwenhoek's observed every type of microbe except protozoa and viruses?

Viruses are very small and can be considered ultramicroscopic. We were not able to see them with the best light microscopes as we could bacteria (prokaryotes). We have to use an electron microscope to see them as they are that small. This was not available until recently. Leeuwenhoek's microscope was not strong enough to see such small things.