Class 10/25/11

One thing we talked about in class today was Epidemiologists (just incase anyone didn't catch this Mrs. Stein was going to be an Epidemiologist but instead she is here with us!)(An Epidemiologist is a person who studies infectious diseases.) The first Epidemiologist was a British man named John Snow. In 1854, whenever someone got an infectious disease they thought their god was putting a curse on them. But John Snow did not believe this and wondered why the disease was spreading. He made a map of his town and traced the infectious disease to the Broad Street pump, and figured out that the virus was spreading through the water.

Another thing we went over in class today was the correct answer for the lab we did about the infectious disease that went around the school by various people. Here is the correct answer:

Mr.Paek

(science class)

Heather

(drama club)

Ed(carrier)

(bus 37) (bus 37) (math class)

Mr.Wegley Laura Mrs. Dillion

We also talked about some ways to prevent from getting an infectious disease. Some ways are paying attention to your surroundings, carry around Purell, don't share drinks, and most importantly, wash your hands after you use the bathroom.

What is a VIRUS?

-may be pathogenic

-may spread quickly

-NOT a cell

-made out of protein and genetic material

-not living!

-parasites rely on a cellular(they attack cells themselves)host to exist and replicate

-genetic material is not in nucleus(DNA or RNA)

-do not metabolize (use energy) or respond to stimuli

-consist of nucleic acid surrounded by a protein coat called a capsid(protein all viruses are made of)

-genes are expressed by using the machinery of the host they infect(gene expression=making proteins

Viruses come in a variety of shapes:

1. Bacteriophage

2. Tobacco Mosaic Virus

3. Influenza Virus

SORRY THIS POST TOOK UP SO MUCH SPACE!

THE LYTIC AND LYSOGENIC CYCLES: