Posts for tag: bacteria
Bacteria are bad… right? They can cause diseases like pneumonia, strep throat, and tooth decay. They are the reason we wash our hands with soap (or antibacterial gels) and cook (or refrigerate) our food. Yet it turns out that bacteria are also necessary to keep our bodies healthy — and new research is showing just how important these tiny microorganisms are to our well-being. Here are five facts you should know about bacteria.
The bacteria in our bodies outnumber our cells by a factor of 10 to 1. An estimated 100 trillion bacteria live inside the average human — but because they’re so small, they make up only 1-3 percent of our body mass.
The collection of bacteria we harbor is called our “microbiome.” Like the groundbreaking study of human DNA called the Human Genome Project, recent research is leading to a “map” of our bacterial makeup. This revolutionary study is called — you guessed it — the Human Microbiome Project.
No two people have exactly the same microbiome. But in general, the bacteria that live in a particular spot on the body (the mouth, for example) play the same roles in different individuals. Research has also shown that a healthy microbiome looks very different from a diseased microbiome.
In terms of bacteria, the mouth is one of the best-understood areas of the body. It has long been known that tooth decay can result when “bad” oral bacteria begin to outnumber their “good” counterparts. Now we are gaining a better understanding of how certain lifestyle factors — like cigarette smoking — may influence the bacterial balance in the mouth.
Understanding the microbiome may lead to new treatments for disease. Researchers hope that one day, certain serious diseases could be controlled by bacterial “transplants” that re-balance an individual’s microbiome. Maintaining a healthy microbiome could also help prevent many diseases.
So by all means, don’t stop brushing your teeth or washing your hands — this helps control bacteria that could harm you — but do remember that not all bacteria are harmful. One day, an infusion of bacteria might just cure your illness.
Most people associate bacteria with disease and ill health. But the real story about the trillions of microscopic organisms now living in and on your body is a bit more complicated. With recent advances in genetic code research scientists are learning that many of these microorganisms you’re hosting are actually beneficial for you — including your teeth and gums.
Beginning at birth and throughout your lifetime you are continually developing a distinct microbiome — actual communities of bacteria and other microorganisms that inhabit your body. As your microbiome develops it helps train your immune system to distinguish between “good” bacteria that help with digestion and other bodily processes and “bad” bacteria that cause disease.Â And it continually adapts to changes in what we eat, the pets we acquire or the drugs we take.
But lifestyle choices like diet can also have a detrimental effect, causing harmful bacteria to become dominant. This seems to be the case with Streptococcus mutans, the bacterial strain most associated with tooth decay. Scientists have analyzed biofilm (plaque deposits on teeth) from the pre-industrial era before 1900 and compared it with modern biofilm samples. They’ve found Streptococcus mutans levels to be much higher in modern biofilm, which they directly attribute to the modern Western diet.
As we gain a better understanding of these findings and of the role of bacteria in our lives, it could change many health recommendations not only about diet but about medications too. In the fight against disease, for example, we’ve used antibiotics to eradicate infection-causing microorganisms, but with a broad destructive ability that can also kill many beneficial strains of bacteria. It’s hoped as our knowledge grows we’ll be able to create newer drugs that more narrowly target harmful microorganisms while not affecting beneficial ones.
There’s a new appreciation emerging for bacteria’s role in our lives. As a result efforts to rebalance a person’s microbiome when they become sick may eventually become a critical element in healthcare treatment strategies. The benefits of this strategy for health, including for our teeth and gums, could be quite impressive.
If you would like more information on the role of bacteria in oral health, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “New Research Shows Bacteria Essential to Health.”