Class 9 General Science Chapter 5 Question Answer

Complete Notes of Class 9 General Science Chapter 5 Question Answer Diseases, Cause and Prevention Notes in 9th Class General Science Urdu Medium by Sir Usman Lateef Suib. These computerized notes are very helpful in the preparation of the Diseases, Cause and Prevention Notes for students of the Class 9 General Science Chapter 5 Question Answer these are according to the new paper patterns of all Punjab boards.

• Important Multiple Choice Questions (MCQs) and Short Questions of Chapter No.5: Diseases, Cause and Prevention in General Science 9th class Urdu Medium.
• Diseases caused by viruses, bacteria, parasites and fungi, their spread and their preventive measures.
• Spread of microorganisms through air, contact, faeces, animals and skin abrasions and wounds.
• Preventive measures against microbial diseases.
• Diseases caused by smoke and smoking.
• Mental diseases and their treatment.
• Differentiation between drugs, medicines and addiction, their uses, abuses and effects on society.
• Microorganisms are the living cells which are present all the time around us in the environment such as earth, air, water. All the infectious diseases are caused by microscopic bacteria and viruses. These organisms are of different shapes and sizes. Nevertheless some disease producing organisms can be seen by human eye, such as intestinal worms etc. The fungus look like plants but they have no roots, stems and leaves and these can also cause many diseases.
• Diseases Caused by Germs: Virus, bacteria, fungus and worms can cause many diseases. 
• Dengue Fever: It is caused by Dengue Virus. Dengue Fever is also know as Break Bone Fever due to severe joint pain. Detail is given on page 176.
• Viral Diseases: Small pox: It is an acute infectious disease. Now this virus is non-existent in the world as an infectious agent but it is kept in the laboratory for further experiments in South Africa, Russia, Great Britain and America (USA). The common symptoms of this disease are acute fever, headache, backache, vomiting and fits which occur often in children. On third or fourth days of fever spots may occur on arms and legs.
• This virus may affect both sexes at all ages. One attack of smallpox may produce immunity for whole life and second attack is very rare. The virus spreads by the coughing. sneezing, talking to the patient and thus enters the respiratory tract of the healthy people.
• Poliomyelitis: Polio is an infectious viral disease. Poliomyelitis is very common in the children below 2 years of age. It is primarily an infection of the human alimentary tract, the virus gains entry by the eatables and water. It may affect the central nervous system resulting in varying degrees of paralysis. The patient feel cold and fever, vomiting and pain of muscles. Often paralysis does not occur but if the infection is severe then paralysis of any part may occur. Poliomyelitis may paralyse one or both legs which causes weakness and retards the growth of the limb.
• Once paralysis of poliomyelitis occurs then no medicine can cure it. Antibiotic are also of no help. The child who is paralyzed by poliomyelitis, should be given balanced diet to promote defence system of his body. He should do regular exercise and physiotherapy to strengthen the other muscles of the body. 
• Influenza or Flue: Influenza virus is of three types, type A, type B and type C influenza virus, but type A and type B are more dangerous. Influenza is a rapidly spreading disease which spreads from one or two patients and finally involves the whole world. The main symptoms of influenza are sore throat, fever, cough, watery nose, watery eyes, headache, and muscular cramps. After a minor work the patient gets tired.
• The influenza virus attacks all ages and both sexes equally. It is more prevalent in winter and during the raining season. It spreads more rapidly in places where people are over crowded.