What structural features of bacteria do you think help them to survive?

Name four characteristics of bacteria that aid them in producting disease.

http://en.wikipedia.org/wiki/Bacteria
please read the link and then think about these statements:

fast reproductive rate
tough cell wall
ability to form spores
small size for invading hosts and filling other small niches

Tough cell wall.ability to form spores.small size for invading hosts and other small niches