It is an antibiotic that works by stopping the growth of certain bacteria.

The net effect is to permit more extensive growth than normal of certain bacteria.

"We can actually smell the difference between certain bacteria."

Tooth decay is caused by certain bacteria in the mouth.

Arabinose is used as a culture medium for certain bacteria.

It also contains ingredients that seem to be able to fight certain bacteria.

It can be caused by a virus or certain bacteria.

It can also be made through the use of certain bacteria.

It is possible to make intensified cultures of certain bacteria.

It is also used to kill certain bacteria that grow on plants.