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Turn in your FLR!

Turn in your FLR!. Rubric Peer edit sheet Final Draft. Diseases Caused by Bacteria & Viruses. Bacteria!!!. Pathogen – disease causing agent Interferes w/normal activities of body Not all bacteria are pathogens. Streptococcus causes skin & wound infections. How bacteria cause disease.

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Turn in your FLR!

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  1. Turn in your FLR! Rubric Peer edit sheet Final Draft

  2. Diseases Caused by Bacteria & Viruses

  3. Bacteria!!! • Pathogen – disease causing agent • Interferes w/normal activities of body • Not all bacteria are pathogens Streptococcus causes skin & wound infections

  4. How bacteria cause disease 1. Damage cells & tissue • Break down cells for food • Ex: Tuberculosis-causing bacteria 2. Release toxins or poisons • Travel throughout body • Ex: toxic shock syndrome, food poisoning, tetanus

  5. Preventing Disease • Vaccine (before infection) • Weakened or killed pathogen causes body to produce immunity to disease • Antibiotics (after infection) • Drugs stop bacteria from growing & dividing • Ex: penicillin, tetracycline • Increased human life expectancy

  6. Controlling Bacterial Growth • Sterilization by heat • Most bacteria cannot survive • Disinfectants • Chemical solutions that kill bacteria • Overuse of antibacterial chemicals causing resistance • Food Storage/Processing • Cool temperatures • Steaming, frying, boiling • Chemically preserved food

  7. Disease Pathogen Prevention Regular dental hygiene Protection from tick bites Current tetanus vaccination Vaccination Proper food-handling practices Maintaining good health Clean water supplies Tooth decay Lyme disease Tetanus Tuberculosis Salmonella food poisoning Pneumonia Cholera Streptococcus mutans Borrelia burgdorferi Clostridium tetani Mycobacterium tuberculosis Salmonella enteritidis Streptococcus pneumoniae Vibrio cholerae Common Diseases Caused by Bacteria

  8. Viral Disease in Humans • Virus disrupts body’s functions • Attacks & destroys certain cells (polio) • Change cell growth pattern (papilloma virus = wart) • Antibiotics cannot kill • Vaccine best protection • Can infect animals & plants

  9. Type of Virus Nucleic Acid Disease Oncogenic viruses Retroviruses Adenoviruses Herpes viruses Poxviruses DNA RNA DNA DNA DNA cancer cancer, AIDS respiratory infections chickenpox smallpox Common Diseases Caused by Viruses

  10. Prions • Causes disease by forming protein clumps • Contain no DNA/RNA • Protein Infectious Particles • Infects animals & humans • Ex: Mad Cow Disease & Creutzfeldt-Jakob Disease

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