SUB.SCIENCE
1. Complete the empty boxes with correct answer.
living things
include
Micro-organisms - are
microscopic
can be
prevented
spread
by
useful
organisms
organisms
1
ats throw
CHUSE
used by
in
tuberculosis
such
ecosystems
people
AIDS
role in
some have
malania
decomposing
Cures
developed by
recycle nutrients
scientists
Answers
Answer:
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Safe Drinking Water Foundation
Disease Causing Micro-organisms
DISEASE CAUSING MICRO-ORGANISMS
Disease Causing Micro-organisms
DISEASE CAUSING MICRO-ORGANISMS FACT SHEET
WHAT ARE DISEASE CAUSING MICRO-ORGANISMS?
How many times have we been told to wash our hands before sitting down at the supper table or after touching money and other dirty surfaces? By washing up we think that we’re clean and microorganism-free. We have baths, cook our food, treat our sewage and even cover our mouths when we cough and sneeze to prevent the spread of those tiny dirty particles that could make us sick. What many people don’t realize is that even after doing all of these things, we are still far from being clean. The number of microorganisms living on and in us is about ten times higher than the number of cells that make up our entire body! Before you try and scrub away those tiny organisms all over your skin, consider that most of these microorganisms are essential to our health.
Disease Causing Micro-Organisms
Disease-causing microorganisms, however, are another matter entirely. They use simple tricks to enter our bodies so they can cause disease. These germs have been studying ways to trick the human immune system for a long time because getting past the body’s defences is key for their survival. We may even learn a thing or two about the immune system by studying them. Who knew we could learn from something so small?
(All bolded terms are found in Glossary at end of this sheet).
WHAT IS A MICROBE?
Microbe
A microbe – another word for a microorganism – is a tiny individual living thing that is way too small to be seen by the human eye alone. The only way this tiny organism can be seen is by using a microscope. This is why microbes are often called “microscopic organisms.” These organisms are found almost everywhere you can think of here on Earth – in air, water, soil and rock, and even in plants, animals and the human body. Some microbes can live in very hot temperatures, and others can live in the freezing cold. Some need oxygen to grow and stay alive, like you or I, while others survive without it. Below is a list of some good microbes that are found in our bodies.
Microbes in the Healthy Human Body
While some microbes play an important part in our daily lives by keeping us healthy, others are nothing but bad news. These “bad-news” microbes are called disease-causing microbes and can make humans, animals and plants sick by causing infection and disease. Most microbes belong to four major groups: bacteria, viruses, protozoa or fungi. (To find out more, see the “Bacteria/Viruses/Protozoa” fact sheets). Disease-causing microbes can also be called pathogens, germs or bugs and are responsible for causing infectious diseases. They can also contribute to chronic diseases and conditions, and are now being linked with coronary artery disease, diabetes, and certain types of cancer, multiple sclerosis and chronic lung disease.
Microbe on Skin
MICROBES – THE ONES THAT MAKE US SICK
Infectious diseases caused by disease-causing microbes are responsible for more deaths worldwide than any other single cause! Scientists are working hard to find ways that will control these germs but trying to defeat them is not an easy task. Disease-causing microbes are very good at adjusting to new environments making it hard to find a way to get rid of them. Microbes can quickly develop new features that make them resistant to the drugs that were once able to kill them. This means scientists must try and stay one-step ahead, even though it is hard to do. New diseases caused by recently discovered pathogens are also being identified at an increasing rate. In the past 30 years about 30 new pathogens have been identified!