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Umer nawaz

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Azmi Ali
Azmi Ali

This document discusses microorganisms and whether they are friendly or enemies. It defines microorganisms and describes different types including bacteria, fungi, algae and protozoa. It explains that some microorganisms like lactobacillus and yeast are friendly and used to make foods like bread, curd and cheese, while others are pathogens that can cause diseases in humans and plants. The document also covers how microorganisms can be harmful if they spoil food and discusses methods of food preservation to protect against microbes.

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Micro-organisms friendly or enemy Presented By : Azmat ahmed
PRESENTATION TOPIC Micro-organisms friendly or enemy
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
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 ,
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.
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
• 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
• Examples ; streptomycin , tetracycline , erythromycin . • Vaccines are important to protect us from disease and vaccines protect us from different diseases like polio , cholera , typhoid etc.
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.
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. .
• 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.
anopheles mosquito aedes mosquito
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 .
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. .
Umer nawaz

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Umer nawaz

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