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Why Vaccination? PowerPoint PPT Presentation

Why Vaccination? Vaccines control diseases and can protect individual animals from illness and death. Outline of Presentation What vaccines do How vaccines work Dog and cat vaccination Vaccination! What Vaccines do: Increase Resistance to Infection

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Why Vaccination?

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Why Vaccination?

Vaccines control diseases and can protect individual animals from illness and death.


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Outline of Presentation

  • What vaccines do

  • How vaccines work

  • Dog and cat vaccination


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Vaccination!

What Vaccines do:Increase Resistance to Infection

There are many ways to improve general health:

Proper nutrition,

Exercise,

Healthy lifestyle,

and…


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Healthy Lifestyle--The Best Way to Prevent Disease!

  • Eating healthy food, taking vitamins, and regular exercise stimulates the immune system.

  • Good sanitation such as washing your hands also limits an infectious agent’s ability to spread to you and others.


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Vaccinations help both you and your best friend stay safe.


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Why Is Vaccination Important

Protect everyone who is vaccinated

Target specific diseases

Stop epidemics


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Goals of Vaccination

  • Vaccinate the largest

    possible number of

    individuals in the

    population at risk.

  • Vaccinate each individual

    no more frequently than

    necessary.

  • Vaccinate only against infectious agents to which individuals have a realistic risk of exposure and subsequent development of disease.


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Vaccines

Vaccines consist of killed or weakened microbes that stimulate the immune system so it will be prepared to defend your body against these diseases.


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How Vaccines Are Made

Microbes grown on suitable medium

Purified to remove compounds that could cause allergic reactions

(not always possible)


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Review Quiz What Vaccines Are

  • What are two main ways to improve resistance to infection?

  • Why is vaccination important?

  • What should the goals of vaccination be?

  • What is a vaccine?

  • How are vaccines made?


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How Vaccines Work


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?

How Vaccines Work

  • Vaccines usually stimulate

    the immune system to recognize the infectious agent and to produce antibodies to the disease.

  • If the immunized animal is later exposed to the infectious agent, the antibody-producing cells “remember” their earlier encounter with the infectious agent and respond quickly to make more antibodies.


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So what’s an antibody?

An antibody is a protein (called immunoglobulin) that can destroy infectious microbes by making it more easy for white blood cells to capture and destroy the microbes.


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How Antibodies Work

2. Antibodies recognize the invaders and attach to the microbes

1. Microbes such as bacteria invade the body

4. White Blood Cells come and destroy the invading microbes

3. Antibodies send signals to attract the White Blood Cells, the defending cells in the body.


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Different Types of Vaccines

  • Weakened (Modified Live) Vaccine

  • Inactivated (Killed) Vaccine

  • Toxoid Vaccine

  • Subunit Vaccine


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Weakened (Modified Live) Vaccines

Produced by weakening a live vaccine or removing it’s disease-causing ability.

Pros

Cons

  • They have to be kept in special conditions, like refrigeration.

  • They can mutate and might cause the disease.

  • They emit a large immune system response so you only have to receive the vaccine once or twice.


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Inactivated (killed) Vaccines

These vaccines are produced

by killing the infectious agent.

Pros

Cons

  • They do not have to be refrigerated.

  • They will never come back to life and cause the disease.

  • They usually require booster shots because they only weakly stimulate the immune system to make antibodies.


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Toxoids

  • Toxoids made by inactivating the toxin that some infectious agents create.

  • Toxoids used against Tetanus and Diphtheria.

Pros

Cons

  • You only have to have the vaccine once or twice.

  • They will never be reactivated and cause the disease.

  • They have to be refrigerated.


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Subunit Vaccines

  • Made by taking apart an infectious agent and only using the antigenic part (the part that stimulates an immune response).

  • Example vaccines: Hepatitis B and Streptococcus pneumoniae

Pros

Cons

  • They are more difficult to make and require new, expensive technology.

  • They cannot cause the disease.


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Time to Produce Protection

  • Vaccines do not stimulate immunity immediately after they are given. It takes 5-14 days for the immune system to respond and remember the agents that are introduced.

  • In some instances, two or

    more vaccinations several

    weeks apart must be given

    to achieve protection.


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Review Quiz

  • How do vaccines work?

  • What are antibodies and what do they do?

  • What are the different types of vaccines?


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Vaccination for Dogs & Cats


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Vaccines have saved the lives of millions of dogs and cats by protecting them against diseases.

Before the days of effective vaccines, dogs routinely died from distemper, hepatitis, leptospirosis, parvovirus and complications of upper respiratory infections such as kennel cough.

Vaccines are Life Saving


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Importance of Physical Exam

  • Pets need to be healthy to receive vaccination. Sick animals do not respond well to vaccination.

  • Veterinarians provide health and

    nutrition information that you can’t

    get from pet stores.

Pets that visit the veterinarian once a

year are healthier, happier, and live longer.


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Not every dog or cat needs the same set of vaccinations.

Pet owners should work with their veterinarians to design a vaccination schedule for each pet based on age, health status, reproductive status, and environment.

Tailored Vaccination Program


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Vaccination: Balancing the Risks

  • Even vaccines that have been proven to be safe and effective in most animals may cause adverse reactions to a small group of animals.

  • However, vaccines have greatly reduced the incidence of diseases in many countries, protecting the health of many animals.

  • Also, by vaccinating animals against diseases that are zoonotic (transmissible between animals and humans), we are protecting people as well.


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Vaccine Example: Rabies

  • Rabies vaccine causes adverse reactions in 1 out of 60,000 dogs.

  • In the United States, rabies in domestic animals (like dogs, cats, and cattle) has declined dramatically since the 1950s. This decrease is mainly due to rabies vaccinations.

  • The benefits of giving rabies vaccines for protection against disease far outweigh the risks of occurrence of adverse reactions.


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Adverse Reactions to Vaccines

  • Vaccine reactions are uncommon, but they are important to watch out for because some of these rare reactions can be fatal. It is recommended that your pets be monitored for vaccine reactions for 24 hours following vaccinations.


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Anaphylaxis

Anaphylaxisis a rare, life-threatening, immediate allergic reaction. The most common symptoms are the sudden onset of diarrhea, vomiting, seizures, coma, and shock. The animals' gums will be very pale, and the limbs will feel cold.

If this occurs, take your pet to the nearest veterinary clinic or emergency animal hospital immediately.


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Adverse Reactions to Vaccines (continued)

  • Pain, swelling, redness, and irritation can occur at the injection site. Mild fever, decreased appetite, and depression may also occur. If you notice any of these signs in your pets, contact your veterinarian immediately.

  • Although all these reactions sound scary, compared to the risks of not vaccinating dogs and cats, the risks associated with vaccinations are very small in comparison.


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Review Quiz

  • Why is physical exams by veterinarians important to your pets?

  • Why are we not giving the same vaccines to every animal?

  • What are the risks of vaccination, and why do we still vaccinate if there are risks?

  • What are some adverse reactions of vaccination?


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References & Further Readings

  • Cat Vaccines:

    http://www.catvaccines.com/

  • UC Davis VMTH Canine and Feline Vaccination Guidelines:

    http://www.vmth.ucdavis.edu/vmth/clientinfo/info/genmed/vaccinproto.html

  • AAHA Vaccine Guidelines:

    http://www.aahanet.org/PublicDocuments/VaccineGuidelines06Revised.pdf

  • HealthyPet.com

    http://www.healthypet.com/library_view.aspx?ID=196&sid=1


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