Bacteria are tiny helpers or troublemakers that can live inside our bodies and cause diseases like stomach bugs or coughs.
Imagine your body is a big city with lots of people, bacteria are like little workers who sometimes do the right job, but other times they start a big mess. When they’re happy, they help you digest food or keep things running smoothly. But when they're upset or want to take over, they can cause illness.
How Bacteria Cause Disease
Think of bacteria as tiny invaders sneaking into your body through the mouth, nose, or even a small cut on your finger. Once inside, they multiply, like a group of friends coming over for a party and bringing more friends with them every minute!
When there are too many of these little troublemakers, they can cause your body to react by making you feel sick, maybe with a fever or a sore throat. Your body tries to fight them off, like when you have a tummy bug and throw up to get rid of the bad guys.
Sometimes, the bacteria can even travel through your body, like going from your stomach all the way to your lungs, causing you to cough or wheeze. It’s like a tiny battle happening inside you!
Examples
- You feel sick after eating bad food because of tiny bugs.
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See also
- How does the immune system protect our bodies from illness?
- What Is the Human Microbiome?
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