Normally, you wouldn’t want to have anything to do with Clostridium novyi.

The rod-shaped bacterium is commonly found in soil, manure or under rotting leaves. When it invades a human body, it releases flesh-eating toxins. The last place you would hope to find it is in a hospital.

But researchers used a modified version of this bacterium to destroy an advanced cancer that had spread to a patient’s shoulder. When injected directly into the shoulder tumor, the altered bacterium killed the cancer cells, sparing nearby healthy ones.

Another bad bacterium, Listeria monocytogenes, is a frequent culprit in serious foodborne illnesses. But the microbe is being tested in patients with several types of cancer. Engineered with special tumor-recognition molecules, Listeria prods the immune system into action, marshaling an attack against tumors that the body might otherwise be unable to combat. (1)

Good. Bad.
Health. Disease.
Death. Life.

Stop defining things.
Stop thinking for a moment.
And everything will come back into place…