week 5 blog: helpful bacteria, bad viruses

Not all bacteria are bad!  Some bacteria are helpful! Intestinal bacteria help break down foods.  Without the right kind of bacteria, we would die.  These bacteria help break down food.  So not all bateria are bad, many are useful and help us LIVE!



http://www.ctds.info/helpful_bacteria.html#helpful_bacteria
ezinearticles.com/?Helpful-Bacteria&id=1818496 
nbsp.sonoma.edu/resources/presentations/.../tsld012.htm 

 Viruses, on the other hand, are very harmful.  They infect your cells and make you sick. They are responsible for many deaths (like in Africa)


en.wikipedia.org/wiki/Virus  
www.medterms.com/script/main/art.asp?articlekey=11557
www.mayoclinic.com/health/infectious-disease/AN00652