Question

short note on harms caused by microorganisms

Answer 1

Although microorganisms are useful but there are some microorganisms which are harmful for us. Microorganisms cause diseases in human beings, plants and animals. Some microorganisms spoil food, clothing and leather. Some of the diseases caused by microorganisms are cholera, common cold, chicken pox and tuberculosis etc. There are some insects and animals which act as carriers of disease causing microbes. Some microorganisms cause diseases in plants like wheat, rice, potato, sugarcane, orange etc. Microorganisms that grow on our food sometimes produce toxic substances which are poisonous and cause illness and even death.

Answer 2

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Microorganisms which cause diseases in men, animals and plants, are called pathogens. Pathogens or germs enter a healthy body through air, water, contaminated food and and an infected person by direct or indirect contact or by a carrier. Common ailments like cold, influenza (flu), coughs, polio, chicken pox are caused by viruses.Foot and mouth diseases of cattle are also caused by viruses.Typhoid, tubercuos(TB) are caused by bacteria. Anthrax a dangerous human and cattle disease is also caused by bacteria. Disease like dysentery and malaria are caused by protozoa Ringworm is caused by fungi. Some microorganisms release toxic substance when they grow on food. Citrus canker is a bacterial disease that affects trees citrus fruits and is spread by air. Yellow vein mosaic disease is caused by insects in bhindi. Rust of wheat is a fungi disease spread by air.

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