Question

Bacterial contamination can spread quickly because if the conditions are right, bacteria can multiply in:

Answer 1

If the conditions are right bacteria can multiply in seconds, and won't stop multiplying until there is:
1: no space
2: no food
3: or the temperature rises too high or too low.

Answer 2

Given a favorable condition for bacterial growth, bacteria can double its number at regular intervals. It can multiply exponentially also known as exponential growth. Different type of bacteria exhibits different generation time which is usually 15-20 min and some up 12-24 hours.