Yes, apart from the beneficial microorganisms, there are harmful microorganisms. Less than 1% of bacteria have the ability to invade the human body and cause infections. Such microorganisms are called pathogens. They cause infectious and dreadful diseases in plants, animals, and humans. Many of these diseases may be life-threatening if not treated properly.
What are Microorganisms?
Microorganisms are minute, unicellular organisms usually in the form of a colony of cells. They are found almost everywhere and in all living species. These organisms are the first form of life that evolved on the planet earth. Bacteria, virus, protists, and fungi, are some of the well-known microorganisms. These microbes can affect our body in several ways. They can make the host sick by invading their bodies through different vectors. They live within the host cells, get its food and destroy the complete cell by multiplying within the cell.
Also Read: Diseases
Microorganisms and the Diseases Caused
Now let us look at some of the contagious, life-threatening and dreadful infections caused by different microorganisms.
|Type of Microorganisms||Diseases Caused|
|Bacteria||Pneumonia, Tuberculosis, Cholera, Food poisoning.|
|Virus||Common cold, flu, diarrhoea, polio, rabies, measles, HIV|
|Protists||Sleeping sickness, Leishmaniasis, Dysentery, Chagas.|
|Fungi||Ringworm, athlete’s foot, yeast infections, Jock itch.|
Also Read: Infectious diseases
This was a brief introduction to Can microorganisms be harmful? Stay tuned with BYJU’S Biology to learn more in detail about the microbes, their types, disease infections and Allergies caused by different microorganisms.