MIcrobiology

Today we're going to keep working on the microbiology section of the course, ready to start the assignment next week.  Answer the following questions in your books:

1. How often do bacteria replicate?
2. For the link above, how many cells can be produced from 1 original cell in 8 hours?
3. What problems are caused by Campylobacter jejuni? Where does it come from?
4. What are some limiting factors which determine how fast bacteria grow? You need to go through three pages here and look for the red headings.
5. What does an antibiotic do?
6. How many different shapes can bacteria take?  What is the name for the long, spiral shaped bacteria?
7. Watch the video below, and use this link to explain how penicillin was discovered. What is it used for? 
8. How can bacteria affect your health in this article?
9. What other health problems can staphylococcus bacteria cause?



Gram positive cocci are blue, Gram negative bacillus are red/pink.

10. Gram staining is one way of telling bacteria apart, and involves a colour test which uses parts of the cell walls. Give one difference between gram + and gram - bacteria.

11. Play the activity here. What issues are there for the white blood cells in finding the pathogens 

12. Finally, try this activity and think about how the pathogen (you!) is being transferred from person to person, or country to country.