Join Date: Aug 2012
Location: North Carolina
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"Importantly, any measurable titer to a vaccine including distemper & parvovirus means that the dog has specific committed immune memory cells to respond and afford protection upon exposure. It really doesn’t matter how high the titer result is as long as it measures something. If your dogs consistently have no measurable titer to canine distemper virus, it means mean that they are distemper “non-or low-responders”, an heritable trait where they will never mount immunity to distemper and will always be susceptible. These dogs should not be used for breeding."
This is from Dr. Jean Dodd's FAQ about Titers and vaccine protocol.