VIROLOGVIROLOGYY

(STUDY OF VIRUSES)

A tiny, nonliving particle that is…

VIRUS:*Latin for “poison” or “slimy liquid”

Definition:

1…smaller than a cell

2…not considered a "living” organism

3…virulent - can cause disease

A Virus is a parasite

invades living cells -

can only "live"(survive/reproduce) within a cell

Where do viruses come from?

1. What does Genesis tell us?

2. How could viruses have fulfilled a GOOD purpose?

3. How do you see the mark of sin on even thesevery small pieces of God’s creation?

What do we KNOW?

Properties of Viruses(what they look like and other stuff like that!)

*consist of DNA..

*..or RNA

This is their geneticmaterial

Size

*smaller than smallest bacteria cell

(Properties of viruses, continued…)

Shapes-

Rod, brick, thread, or bullet..or may have more complicated structures almost

like ROBOTS

(virus shapes, continued..)

Rabies Ebola

InfluenzaEarly Italian scientistsThought this illness was caused by the INFLUENCE of the starsAnd planets..

Hepatitis

Polio

Rhinovirus(common cold)

Rotavirus

Rabies

Polio

Dr. Jonas Salk 1914-1995

Influenza

Ebola

Smallpox

Edward Jenner

How do viruses (most) attack cells and make us sick??

Let’s use the T4 bacteriophage as an example:

T4 bacteriophage is a virus that looks a lot like an alien landing pod------>

With its six legs, the bacteriophage attaches to the surface of the much larger bacteria Escherichia coli (E. coli).

Once attached, the bacteriophage injects DNA into the bacterium. The DNA instructs the bacterium to produce masses of new viruses.

So what happens to the bacterium?

So many new “baby” viruses are produced

that the E. coli BURSTS!!

This process of bursting is called LYSIS.

Here's what an actual population of E. coli looks like as it is wiped out by T4 bacteriophage:

Now THAT’S a NASTY virus!