Micro organisms friendly or enemy

Micro organisms

1. Micro-organisms friendly or enemy Presented By : Azmat ahmed

2. PRESENTATION TOPIC Micro-organisms friendly or enemy

3. contents What is micro-organisms Types of micro-organisms Friendly micro-organisms Harmful micro-organisms Disease causing by micro-organisms in humans and in plants Food preservation

4. Micro-organisms Micro-organisms are very small organisms that can not be seen with naked eye , but can be seen with the help of microscope . Micro-organisms may be unicellular or multicellular . Micro-organisms may live alone or communities . Micro-organisms are found in all kinds of environment like ice cold climate , hot spring , deserts , marshy lands , etc.

5. Types of Micro-organisms There are different types of micro-organisms like bacteria , fungi , algae , protozoans etc. Viruses are considered as to be micro-organisms they are different from other organisms because they produce only in the body of host cells examples of host cell is worms , nematodes etc.

6. Friendly Micro-organisms Micro-organisms are used for making bread , curd from milk , cheese pickles , cakes , alcohols etc. Micro-organisms are used for making medicines . Micro-organisms helps in fixing atmospheric nitrogen

7. Making Curd from milk : The bacterium called lactobacillus reproduces in milk which convert milk into curd . Making bread ; the fungus called yeast produces in flour dough and produces carbon dioxide during respiration which makes the dough soft and helps in making cakes , biscuits , bread etc. making medicines ; some bacteria and fungus are4 used to make medicines which kills or stops the growth of disease causing micro-organisms such medicines are called as antibiotics

8. Examples ; streptomycin , tetracycline , erythromycin . Vaccines are important to protect us from disease and vaccines protect us from different diseases like polio , cholera , typhoid etc.

9. Harmful Micro-organisms Some microorganisms cause diseases in plants and animals. Such disease causing microorganisms are called pathogens . Some microorganisms grow in food substances and produce toxic substances and makes the food poisonous. Food poisoning causes illness and even death.

10. Disease causing Microorganisms in Humans Disease causing micro-organisms enter our body through air , water , food these micro-organisms are called as pathogens . Disease which can spread from an infected person to a healthy person are called communicable diseases . E.g. :- chicken pox , flu , Tb etc. .

11. Some insects and animals act as carriers of disease causing microbes . E.g. :- House fly, Female anopheles mosquito (malaria), Female aedes mosquito (dengue fever) etc.

12. anopheles mosquito aedes mosquito

13. Disease causing microorganism in plants Micro-organisms like rice wheat causes diseases in plants like rice , wheat , potato , sugarcane , apple etc these produces crop yield these diseases controlled by using chemicals which kill microbes .

14. Food preservation Food is spoilt by microorganisms. Spoilt food has bad smell and bad taste and causes food poisoning. Food can be preserved by protecting it from microorganisms. Food can be preserved by different methods. .