Not all but some of the micro organisms are responsible for the disease and infection causing.
Spoil the food materials.
One harmful effect is dying or diesease
Virus is most harmful
poison
Microorganisms can have varying effects on different individuals based on factors like immune system health, overall health, and exposure level. Additionally, a microorganism's status as harmful or harmless can change depending on the context, such as opportunistic infections in immunocompromised individuals. Therefore, the classification of microorganisms as wholly harmful or harmless is oversimplified.
Tonsils
tintre
An example of a microorganism acting in a harmful way is the bacterium Streptococcus pneumoniae, which can cause pneumonia, meningitis, and other serious infections in humans.
Some microorganisms are part of the body's natural processes. For instance, the bacteria of your digestive tract help you to digest food. Other microorganisms can cause disease. Some otherwise beneficial bacteria can be harmful if they become too abundant.
No exact answer is possible. Certainly many thousands
harmful effects of coelenterates
An anaerobic microorganism.
There are many products of an organism that destroys or weakens harmful microorganisms. This could be an enzyme for example.