2. To prevent a disease caused by a certain microbe, doctors inject the same microbes in a person's blood. How is it ensured that this prevents the disease instead of causing it? What is this process of injecting microbes called?
3. Microbes that live inside the bodies of animals normally cause diseases. However, some of them
also help animals. Give an example to prove this point.
Answers
Answer:
2.Vaccines are made from microbes that are dead or inactive so that they are unable to cause the disease. The antigen in the vaccine is the same as the antigen on the surface of the disease-causing microbe. The vaccine stimulates the body to produce antibodies against the antigen in the vaccine. The antibodies created will be the same as those produced if the person was exposed to the pathogen. If the vaccinated person then comes into contact with the disease-causing microbe, the immune system remembers the antibodies it made to the vaccine and can make them faster. The person is said to be immune to the pathogen.
Vaccines are usually given by an injection. The measles vaccine is combined with the mumps and rubella (German measles) vaccines and is given as a single injection at 12 – 18 months and again at 4 years. It is called the MMR vaccine. When enough people are vaccinated against a disease it is possible for that disease to be eliminated from the world e.g. in 1980 The World Health Organization announced that smallpox had been eradicated.
3.Microbes that live inside the bodies of animals normally cause diseases .for example Entamoeba histolytica cause ulcers. but the E.coli bacteria which is present in intestine help our body breakdown the food we eat as well as assist with waste processing, vitamin K production, and food absorption.
Answer:
Expla2.Vaccines are made from microbes that are dead or inactive so that they are unable to cause the disease. The antigen in the vaccine is the same as the antigen on the surface of the disease-causing microbe. The vaccine stimulates the body to produce antibodies against the antigen in the vaccine. The antibodies created will be the same as those produced if the person was exposed to the pathogen. If the vaccinated person then comes into contact with the disease-causing microbe, the immune system remembers the antibodies it made to the vaccine and can make them faster. The person is said to be immune to the pathogen.
Vaccines are usually given by an injection. The measles vaccine is combined with the mumps and rubella (German measles) vaccines and is given as a single injection at 12 – 18 months and again at 4 years. It is called the MMR vaccine. When enough people are vaccinated against a disease it is possible for that disease to be eliminated from the world e.g. in 1980 The World Health Organization announced that smallpox had been eradicated.
3.Microbes that live inside the bodies of animals normally cause diseases .for example Entamoeba histolytica cause ulcers. but the E.coli bacteria which is present in intestine help our body breakdown the food we eat as well as assist with waste processing, vitamin K production, and food absorption.nation: