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Transcript
B1a.4.3 Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. • Many of the medicines we take when we have infections are not cures but simply relieve symptoms. • They reduce our discomfort and give our bodies time to recover using our natural defences. Do you remember what our natural defences are? How do Aspirin and Paracetamol work? Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. • The amazing class of drugs which really can cure are called ANTIBIOTICS. • They have the power to destroy disease carrying bacteria. They have helped to treat some of the worst infectious diseases known to man. Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics . • Some diseases are so terrible that we use innoculation and vaccination to try to prevent spread of infection. • Others we can now treat to prevent the worst of the symptoms developing Death from diseases which were once common Tetanus Bubonic Plague - Black Death Smallpox Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. Write the Heading ‘Using Drugs to Treat Diseases’ 1. Explain the difference between a drug like Aspirin and a drug like Penicillin (an Antibiotic) You have 4 minutes to do this. Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. • Alexander Fleming discovered Penicillin in 1928. • Read the story of this discovery on page 66. • Now write a full answer to question 2 on page 67 Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. • Now lets read about how antibiotics work. • Page 67 On these plates, discs soaked in antibiotics are placed on the growing colonies. We can see the most effective antibiotics. These plates show colonies of bacteria growing. Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. • Complete your written work by answering the last of the summary questions. • Finally Look at the Key Points box. • Number 3 is especially important. Can you explain why a doctor will not give you antibiotic as a cure for a cold? Objectives: All to know what is classed as a medicine. All to know why viral infections cannot be treated with antibiotics. • Plenary. • Close your books. • Work in Pairs. Call yourselves A and B • ‘A’ - Can you explain what a medicine is to your partner? • Now ask ‘B’ to explain why antibiotics are no good in treating viruses.
