| 1 | Biofilm could be both a form of protection and a means of migration. | |
| 2 | The probability is high that some of these organisms will be picked up and carried over when a transfer is made . | |
| 3 | In short order, the entire colony consisted only of the offspring of the drug-resistant founders. | |
| 4 | The U. S. bacterial limit is no more than 500 colony-forming units of bacteria per millilitre of water. | |
| 5 | Again and again, the bacterial colonies oozed slime in response to ammonia. |