He explained that while we are constantly in contact with germs, only a small minority will cause any harm. That works out well for us, because pretty much any surface contains some of these microscopic organisms.
With that in mind, there is a simple activity that anyone can engage in to stay as safe as possible from surface germs. While he stressed that "the optimal goal is to practice good personal hygiene, good household hygiene and good food hygiene," Tierno also noted the importance of clean hands.
Although they serve similar functions for women and men, purses and wallets are germy for entirely different reasons. But many women don't follow that bit of advice, so their purses pick up the bacteria from wherever they're placed -- from the soiled ground to the bathroom floor.
While some might be willing to put it there because they think the floors are cleaned regularly and thoroughly, that isn't always the case. Paper currency has a way of getting around, from germ-filled hand to germ-filled hand. It picks up germs, viruses and often trace amounts of illegal drugs -- that's not just an urban legend; several studies have confirmed that a majority of U.
And of course, all of that ends up in your wallet. Because men keep wallets in their pockets, the wallet is close to body temperature -- an ideal temperature for bacteria to breed. The problem isn't as bad with coins, largely because the metals -- particularly nickel -- often kill many of the bacteria. The next time you sit down for a late-night movie at home, you may want to keep your hand out of the popcorn bowl if you've been handling the remote. People are constantly handling their remote controls -- and, as Gerba points out, nobody ever disinfects them.
Tierno recommends wiping it down at least once a week, and more often if someone who is sick handles it. Gerba points out that sickness will make the remote even worse, because people who have a cold or the flu tend to "jump in bed with the remote control and contaminate it. The Laundromat is hardly a bower of cleanliness, but even laundry done at home is rife with germs.
There is about 0. That amounts to approximately million E. Unfortunately, only 5 percent of people use very hot water to wash their clothes and then dry them for a full 45 minutes, a process Gerba said would kill more bacteria. Skipping these steps means that transferring wet clothing into a dryer leaves a film of germs all over your hands.
The skin forms an important barrier against microbes from the outside world. In total, you have about 1. In some wet places, tens of millions of microbes live on every square centimetre of skin. The majority of them are useful and harmless. They prevent harmful bacteria on your skin from ever getting their feet in the door.
With every breath, you take in tidal waves of microbes. Some of them can be harmful to your health. The mucous membranes in your nasal cavities and airways produce mucous, and foreign microbes stick to that mucous. Your intestines are the undisputed capital of your microbiome. Of the thousand billion microbes in your entire body, the vast majority lives in your intestines.
Intestinal microbiota consists primarily of bacteria, about 1, different species. From a microbial perspective, genitals are also very interesting. Microbiologists are particularly interested in female genitalia. The unique environment in the vagina cannot be found anywhere else on the body.
This hostess offers a place for a wide range of microbes. Bacteria have been found in the deepest parts of the ocean, seven miles under the surface and as high as 40 miles into the atmosphere. Many species of bacteria can withstand harsh conditions, including extreme heat, cold and saline. In , William Whitman and his team at the University of Georgia estimated the number of bacteria living on the earth by examining different habitat types and estimating those numbers separately.
Habitat types included organisms, water freshwater and oceans and soils. These habitats were broken down into smaller categories when necessary like forest soils versus non-forest soils and often direct bacterial counts were made. When direct counts were not possible, estimates were made based on published literature.
The number of bacteria on earth is estimated to be 5,,,,,,,,,, This is five million trillion trillion or 5 x 10 to the 30th power. Nearly all bacteria are microscopic. Although most bacteria only measure from 0. Bacteria are prokaryotes, which means they do not have nucleated cells like plants and animals.
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