That can lead to bacterial contamination or worse if the wrong sort of liquid is used.

ECONOMIST: Vaccines

You could get very ill from bacterial contamination or other pollutants that often and easily end up in airplane food.

FORBES: Why You Should Avoid Airport Food And Bring Your Own

So-called conventional farms use only synthetic fertilizer, which has no bacterial contamination.

FORBES: Bittman of the 'New York Times': Always Out To Lunch

The inability of the vaccine industry to react more swiftly to a single bad bacterial contamination underscores the need for a better manufacturing process, one using mammalian cell cultures.

FORBES: Broken Eggs

Over the last several years, thousands of beaches have been closed as a result of bacterial contamination from sewage and polluted runoff from farms and city streets.

CNN: Surf's up for beach water quality

An examination of the unique eyes of skate (ray fish) led to advances in combating blindness, the horseshoe crab was crucial in developing a test for bacterial contamination, and sea urchins helped in the development of test-tube fertilization.

CNN: Mars can wait. Oceans can't