The germs among us

Germs are microscopic organisms, such as bacteria, viruses, fungi, and protozoa.

As one who doesn’t believe in sanitizing everything—or, really, anything—I was heartened to read about an international project in which over 900 scientists and volunteers collected samples of microorganisms from subways in 60 cities and on six continents. They swabbed turnstiles, railings, ticket kiosks, benches, and subway cars. (One researcher was thanked by a bystander for cleaning the subway.)

The researchers found 4,246 known species of micro-organisms. Two thirds of these were bacteria and the remainder were a mix of fungi, viruses, and other kinds of microbes. They also found 10,928 viruses and 748 kinds of bacteria that had never been documented.

The vast majority of the collected organisms pose little risk to humans. As one scientist reported, “We don’t see anything that we are worried about. People are in contact with these all the time.” In fact, nearly all of the new viruses the researchers found are likely to be bacteriophages—viruses that infect bacteria.

 Half of the bacteria the researchers identified were those that typically live in and on the human body, especially the skin. Some of the bacteria were those that live in soil, and some were a species typically associated with the ocean.

All this is to say that microbes are a natural part of our environment. You can’t avoid the little creatures, and you can’t get rid of them.

For an introduction to this blog, see I Just Say No; for a list of blog topics, click the Topics tab.