"Bacteria are harmful to human beings." Briefly explain this statement..

Bacteria are responsible for a number of diseases, some of which are typhoid, leprosy, TB, pneumonia, cholera, etc. They also cause spoilage of food items such as milk, meat, fish and vegetable. Tinned and package food also get spoiled due to bacteria, after their expiry date. Thus, we can say that the bacteria are harmful to human beings.