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Lecture 40

NATS 1670 Lecture 40: Lesson 40

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Natural Science
NATS 1670
Motti Anafi

Lecture 40 Milking Snakes Inactivate the toxicity (toxoid) and injecting the modified venon to horses Horse serum Advantages and Disadvantages of Passive Immunization Advantages Disadvantages Immediate protection No long term protection Risk of infection with unknown pathogens eg. 80s hepatitis BC and AIDS Serum sicknesss Prevention and Therapy of Infections Most of the damage to cells during infections occurs very early, often before the clinical symptoms of disease appear This makes drugs treatment of infection irrelevant in many cases Prevention of infection is better And cheaper Vaccines Exposing an individual to a pathogen, which allows their antigens to work against it to fight it Memory cells learn how to fight the pathogen What is a vaccine? Harmless agents, perceived as enemies Trigger active immunity, stimulating the body to defend itself Provide protective immunity against a potential pathogen Herd Immunity Describes a type of immunity that occurs when the vaccination of a portion of the population provides protection to unprotected individuals Milestones in Immunization 2000 BC Chinese physician realized if you get smallpox, you will not get infected by it again Sniffing of smallpox crust in China Variolation inoculation with the wild type smallpox 1500 AC Turks started to use variolation 1720s AC
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