A microbe is anything too small to be seen without a microscope. Microbes are in the water you drink, the food you eat, and the air you breathe - they are everywhere. About 95% are good for us. Microbes and Diseases. These are called PATHOGENS. They include: Viruses Bacteria Fungi
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Microbes are in the water you drink, the food you eat, and the air you breathe -they are everywhere.
About 95% are good for us.
The body’s natural barriers:
A rash Fever Swelling Vomiting DiarrhoeaSYMPTOMS–signs of a disease (illness) not normal
stop the bacteria reproducing
and others kill the bacteria.
Salmonella is a type of bacteria. It is usually found in chicken, eggs, fish, meat and water.The salmonella bacteria attack the stomach and intestines. The bacteria attack all age groups and both sexes. Children, the elderly and people who are already ill are much more likely to get a serious infection.
The immune system’s job is to kill any organisms that enter the body
White blood cells are always used in fighting off microbes and are responsible for building up immunity to disease.
One type of white blood cell attacks anything that is ‘foreign’ or not meant to be there. It surrounds the microbe and digests (eats)it.White Blood cells defend the body!
Every pathogen has unique molecules (antigens) on its surface; when white blood cells don’t recognise these antigens, they start to produce antibodies, which lock onto and kill the pathogens.
Once a white blood cell recognises the antigens on a pathogen, it divides quickly to make more antibodies to fight the infection. Some of these cells stay in the blood and ‘remember’ the antigens, so that they can quickly produce lots of antibodies if the body gets infected again – that’s why you are usually immune to most diseases you have had in the past.
Some people are worried about possible side effects and refuse to let their children be vaccinated – even though getting the disease may be worse than the side effects