Question

What are some examples of nonpathogenic bacteria? How do they live in organisms?

Answer 1

Non-pathogenic bacteria are those bacteria which don’t cause disease or harm to other organisms. Most of the bacteria are non-pathogenic in nature. There are numerous non pathogenic bacteria residing inside our body in colonies. These organisms provide various benefits to the human body.

Complete answer:
Bacteria are unicellular prokaryotic organisms. They are one of the oldest forms of life existing on earth. Even though many bacteria are pathogenic and cause illness in humans, there are many bacteria that have mutual relationships with us and are vital to our survival. Some research has demonstrated that non-pathogenic bacteria may inhibit the growth and reproduction of pathogenic bacteria. There are many examples of non-pathogenic bacteria and a few of them are listed below.
Escherichia coli or E. coli is the gram-negative stained bacteria present in the colon, a part of the large intestine in humans. They are facultative aerobic bacteria, that is, usually the respiration in them is through aerobic methods but when oxygen is absent they can also survive by anaerobic respiration. E.coli exhibit a mutualistic relationship with the host body, by preventing the pathogenic bacteria from forming colonies in the colon and also by producing vitamin K which is essential for blood clotting.
Lactobacillus lacti grows on milk and converts it into curd. It improves the nutritional quality of milk by increasing vitamin B12. It also helps in checking disease-causing organisms in our stomach.
Bacteroides are found within the intestines. It prevents pathogenic bacteria from colonizing the intestines and helps in breaking down useful nutrients from food and consumes unimportant nutrients.
Bifidobacteria form part of the normal colon flora. It is used in food industry processes to make probiotic products.

Note:
There are several species of bacteria that are harmful for living organisms. They cause disease in plants and animals. Some of the diseases caused by bacteria are Tuberculosis, Cholera, Typhoid, Diarrhea, Peptic ulcers etc.
Probiotics products are produced from good bacteria and they help us to keep our body healthy.