Scientists are recruiting some amazing microbial armies in the fight against cancer and other illnesses.
Because these and other bacteria can cause serious illness — and even death — they tend to get all the attention. And we tend to think ofBut most bacteria aren’t harmful, and many are helpful — even necessary — to a healthy life. Without bacteria, we wouldn’t be able to digest certain foods or synthesize some crucial vitamins. Some bacteria even eat other microbes that do make us ill.
, we have at least as many bacterial cells in our bodies as we have human cells, maybe slightly more. And those tiny critters aren’t just passive passengers. Elaine Hsiao is a researcher at UCLA who studies how the microbiota affects the nervous system. In a 2015 YouTube, she explains that these microbes interact with each other and form communities. “They divide and replicate” and “they even wage wars against each other,” she says.
When bacteria do cause problems, however, those problems are not limited to what you typically think of as infectious disease. Microbes have been linked to a
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