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Bacteria can be harmful by invading a person's body and causing disease and even death. Bacteria can also lead to food spoilage, which negatively impacts someone's food supply at best and causes illness at worst.

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Q: How can bacteria be harmful to humans?
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Related questions

How much percent of bacteria are harmful?

Only 1% of bacteria is harmful to humans


How does bacteria affect human health?

Some bacteria are beneficial to humans, and some bacteria are harmful to humans.


Are pathogenic bacteria benificial or harmful to humans?

The word pathogenic means disease causing. So they can be harmful...but some pathogenic bacteria only are harmful to plants or dogs or cats, etc.


Is penicillian harmful to humans?

no, its an anti-biotic that kills most bacteria.


Is bacteria in compost harmful?

Probably to humans, I wouldn't eat dead leaves. Well yes you wouldn't eat dead leaves but in an eco way they are helpful.


Do humans use bacteria to synthesize drugs?

yes. some diseases such as cancer can be cured with harmful bacteria.


What makes some bacteria harmful?

some bacteria produce toxins in their metabolism which is harmful for humans. if you have used antibiotics, the normal, good, bacteria that live in your body can be replaced by a pathogen, which will make you sick.


How can bacteria be helpful to humans?

helpful bacteria helps digest food in our bodies and the bacteria in our mouth, noise and throat help to keep harmful bacteria out!


How can bacteria to helpful to humans?

helpful bacteria helps digest food in our bodies and the bacteria in our mouth, noise and throat help to keep harmful bacteria out!


What are the following describe a way in which bacteria are harmful to humans?

Some human diseases, such as erythromycin and tetracycline, are made by bacteria.


Can bacteria harmful to humans?

It depends what kind of bacteria you're talking about. Our bodies naturally contain bacteria that helps us digest food.


Why all bacteria harmful or why no?

Bacteria may be harmful or helpful to humans. Some bacteria may cause lethal diseases when infecting humans, whereas others may be necessary to help maintain optimal health in humans (such as those in the small intestine which produce Vitamin K). Other bacteria help us with the production of various foods (cheese) and beverages (beer and wine).