Review of Viruses and Bacteria

Review of Viruses and Bacteria

The influenza pandemic of 1918-1919 killed more people than World War I, at somewhere between 20 and 40 million people.

Pandemic  = an outbreak that occurs over a large geographic area

Epidemic = outbreak that is contained to  one region

The FLU

• Symptoms of Influenza   (The “Flu”)

  
  

  Fever, Severe muscle aches, Chills and sweats, Headache, Cough, Fatigue and weakness ,Nasal congestion

• Influenza virus infects the cells of your respiratory system.

Multiple Choice

How many people died from the Spanish Flu?

• 5- 10 million

• 10-20 million

• 20-40 million

• 50 million +

Multiple Choice

The flu is a virus that attacks the ________________ system.

• endocrine

• reproductive

• circulatory

• respiratory

Multiple Choice

Which stage includes the making of new virus parts?

• attachment

• penetration

• biosynthesis

• assembly

HIV is the virus that causes AIDS.  

HIV enters the cells of your immune system.

Your immune system stops working and you get other infections.

HIV Virus

HIV can lead to....

Kaposi’s sarcoma is found in someone who is HIV positive, it is a type of skin cancer. 

Multiple Choice

HIV can lead to this sarcoma:

• Hildebrandt's

• Einstein's

• Kaposi's

Immune System

Cells that are under attack send out signals to your immune system.

White blood cells send out macrophages to destroy infected cells

Macrophages

Macrophages digest viruses and infected cells.  They  eventually die.

The phlegm and snot you experience when you are sick contains these dead white blood cells. 

Antibodies

Antibodies attach to the virus or to infected cells

They “tag” the cell for destruction.

Multiple Select

White blood cells send out _______________ to destroy infected cells.

• red blood cells

• liver cells

• respiratory cells

• macrophages

Multiple Choice

What kind of drug can help slow the spread of viruses such as the flu?

• Antibiotics

• Tylenol

• Tamiflu