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Immunization Schedules

Distemper (MLV)
Initial (e.g. Intervet Progard Puppy) 9 weeks, 12 weeks, 16 – 20 weeks
1st Annual Booster At 1 year MLV Distemper/ Parvovirus only
Re-Administration Interval None needed.
Duration of immunity 7.5 / 15 years by studies. Probably lifetime. Longer studies pending.
Comments Can have numerous side effects if given too young (< 8 weeks). Parvovirus (MLV) Initial (e.g. Intervet Progard Puppy) 9 weeks, 12 weeks, 16 - 20 weeks 1st Annual BoosterAt 1 year MLV Distemper/ Parvovirus only Re-Administration Interval None needed. Duration of immunity 7.5 years by studies. Probably lifetime. Longer studies pending. Comments At 6 weeks of age, only 30% of puppies are protected but 100% are exposed to the virus at the vet clinic. Rabies (killed) Initial 24 weeks or older 1st Annual BoosterAt 1 year (give 3-4 weeks apart from Dist/Parvo booster) Killed 3 year rabies vaccine Re-Administration Interval 3 yr. vaccine given as required by law in California (follow your state/provincial requirements) Comments rabid animals may infect dogs. Vaccines Not Recommended For Dogs Distemper & Parvo @ 6 weeks or younger Not recommended. At this age, maternal antibodies form the mothers milk (colostrum) will neutralize the vaccine and only 30% for puppies will be protected. 100% will be exposed to the virus at the vet clinic. Corona Not recommended. 1.) Disease only affects dogs <6 weeks of age. 2.) Rare disease: TAMU has seen only one case in seven years. 3.) Mild self-limiting disease. 4.) Efficacy of the vaccine is questionable. Leptospirosis Not recommended 1) There are an average of 12 cases reported annually in California. 2) Side effects common. 3) Most commonly used vaccine contains the wrong serovars. (There is no cross-protection of serovars) There is a new vaccine with 2 new serovars. Two vaccinations twice per year would be required for protection.) . 4) Risk outweighs benefits. Lyme Not recommended 1) Low risk in California. 2) 85% of cases are in 9 New England states and Wisconsin. 3) Possible side effect of polyarthritis from whole cell bacterin. Boretella (Intranasal) (killed) Only recommended 3 days prior to boarding when required. Protects against 2 of the possible 8 causes of kennel cough. Duration of immunity 6 months. Giardia Not recommended Efficacy of vaccine unsubstantiated by independent studies There are two types of vaccines currently available to veterinarians: modified-live vaccines and inactivated ("killed") vaccines. Immunization Schedules There is a great deal of controversy and confusion surrounding the appropriate immunization schedule, especially with the availability of modified-live vaccines and breeders who have experienced postvaccinal problems when using some of these vaccines. It is also important to not begin a vaccination program while maternal antibodies are still active and present in the puppy from the mother's colostrum. The maternal antibodies identify the vaccines as infectious organisms and destroy them before they can stimulate an immune response. Many breeders and owners have sought a safer immunization program. Modified Live Vaccines (MLV) Modified-live vaccines contain a weakened strain of the disease causing agent. Weakening of the agent is typically accomplished by chemical means or by genetic engineering. These vaccines replicate within the host, thus increasing the amount of material available for provoking an immune response without inducing clinical illness. This provocation primes the immune system to mount a vigorous response if the disease causing agent is ever introduced to the animal. Further, the immunity provided by a modified-live vaccine develops rather swiftly and since they mimic infection with the actual disease agent, it provides the best immune response. Inactivated Vaccines (Killed) Inactivated vaccines contain killed disease causing agents. Since the agent is killed, it is much more stable and has a longer shelf life, there is no possibility that they will revert to a virulent form, and they never spread from the vaccinated host to other animals. They are also safe for use in pregnant animals (a developing fetus may be susceptible to damage by some of the disease agents, even though attenuated, present in modified-live vaccines). Although more than a single dose of vaccine is always required and the duration of immunity is generally shorter, inactivated vaccines are regaining importance in this age of retrovirus and herpesvirus infections and concern about the safety of genetically modified microorganisms. Inactivated vaccines available for use in dogs include rabies, canine parvovirus, canine coronavirus, etc. W. Jean Dodds, DVM HEMOPET 938 Stanford Street Santa Monica, CA 90403

One Response to “Immunization Schedules”

  1. 1
    wldorchidnv:

    With things changing as fast as they do in regards to our dogs health care it is hard to keep up. Thanks for the update.

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