Write short notes
* Useful and harmful bacteria
Answers
Answer:
Bacteria are the most abundant form of life on the planet. They are found in most every environment, from Antarctic ice, to boiling hydrothermal vents, to inside your stomach. Most of these do not hurt us. Actually, many of these organisms are very important to our survival.
Bacteria help many animals to digest food, they help trees grow, and they are important in the recycling of nutrients in the environment. They are also used in biotechnology applications to produce everything from food to energy to clean water.
Uses for good bacteria
Bacteria can be very helpful to humans and other organisms. Click for more detail.
You also have good bacteria within and on your own body. Did you know that you have ten times more bacterial cells in your body than you have human cells? Most of these bacteria are in your digestive system.
There, they help to digest substances that the human body cannot break down, like many carbohydrates and things called short chain fatty acids. It is important that we keep this population healthy. Eating probiotics can help to replenish good gut bacteria. On the other hand, taking unnecessary antibiotics can hurt this community. When this happens, we often get symptoms like diarrhea or stomach pain.
A small European study has found that the average man's beard is more replete with human-pathogenic bacteria than the dirtiest part of a dog's fur.
For the study, published in the February 2019 issue of the journal European Radiology, researchers analyzed skin and saliva samples from 18 bearded men (whose ages ranged from 18 to 76), and fur and saliva samples from 30 dogs (whose breeds ranged from schnauzer to German shepherd), at several European hospitals.
The researchers were looking for colonies of human-pathogenic bacteria in both man and dog — not in an attempt to beard-shame the hirsute masses, but rather to test whether it was safe for humans to use the same MRI scanners that dogs had previously used. [6 Superbugs to Watch Out For]
In fact, it was the humans who were the dirtier patients. Not only did the men's beards contain significantly more potentially-infectious microbes than the dogs' fur, but the men also left the scanners more contaminated than the animals.