Quote:
Originally Posted by cesar49  no one has all the answers here... but, if there is a chance of making my dogs sick with parvo, and the vaccine companies are not doing any studies,
then, i can only assume it is about the money...
why arent they testing? since parvo is already widespread, there is no need to vaccinate.. the virus is everywhere causing healthy dogs to develop a natural immunity to it...
the science of natural immunity goes against the science of safe vaccines..
how many pets out there have auto-immune disoders?
start asking questions when a puppy dies suddenly...
was that puppy recently vaccinated? |
This is a more clear reason why or why not a vaccine is effective when given, but it does state vaccines are effective if donbe properly and at the right time. I personlly will still vacinate all my puppies against Parvo as I have always done.
MATENAL ANTIBODY: OUR BIGGEST OBSTACLE
The biggest problem in protecting a puppy against this infection ironically stems from the natural mechanism of protection that has evolved. As mentioned previously, puppies obtain their immunity from their mother’s first milk, the colostrum, on the first day of life. This special milk contains the mother’s antibodies against parvovirus and until these antibodies wane to ineffective levels, they will protect the puppy.
The problem is that they will also inactivate vaccine.
Vaccine is a solution of inactivated virus, either live and weakened (“attenuated” or “modified”) or killed. This virus is injected into the puppy. If there is still adequate maternal antibody present, this vaccine virus will be destroyed just as if it were a real infection. There will be a period of about a week when there is not enough maternal antibody to protect the puppy but too much to allow a vaccine to work. (This period is called the “window of vulnerability.”) Then after this, vaccine can be effective.
The next problem is the age at which vaccine can be effective is different for each individual puppy.
To get around this, we vaccinate puppies in a series, giving a vaccine every 2-4 weeks until age 16 weeks. By age 16 weeks, we can be certain that maternal antibodies have waned and vaccine should be able to “take.” It should be recognized that some individuals, especially those of well vaccinated mothers, must be vaccinated out to 20 weeks (unless a “high titer” vaccine is used.)
After a puppy is born, maternal antibody levels drop by half approximately every 10 days.
Puppies that were born first or were more aggressive at nursing on the first day, will get more maternal antibody than their littermates.
Mother dogs vaccinated at approximately the time of breeding will have the highest antibody levels to pass on to their puppies.
*** REMEMBER, the more maternal antibody a puppy has,
the less likely a vaccine is to work.