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Vaccines--Duration of Immunity Challenge Study

4024 Views 19 Replies 7 Participants Last post by  biscuit
This abstract from PubMed

Vet Ther. 2004 Fall;5(3):173-86.

Evaluation of the efficacy and duration of immunity of a canine combination vaccine against virulent parvovirus, infectious canine hepatitis virus, and distemper virus experimental challenges.

Abdelmagid OY, Larson L, Payne L, Tubbs A, Wasmoen T, Schultz R.

Schering-Plough Animal Health, Research and Development, 21401 West Center Road, Elkhorn, NE, USA.

The results obtained from this study confirmed that dogs vaccinated subcutaneously with a commercially available multivalent vaccine containing modified-live Canine Distemper Virus (CDV), Canine Adenovirus Type 2 (CAV-2), Canine Parvovirus Type 2b (CPV-2b) and Canine Parainfluenza Virus (CPI) antigens were protected against sequential experimental challenge by virulent canine parvovirus type 2b, infectious canine hepatitis virus, and canine distemper virus administered 55-57 month after initial vaccination given at 7-8 weeks of age. All 10 vaccinates (100%) were protected against clinical diseases and mortality following parvovirus and infectious canine hepatitis experimental infections. All vaccinates (100%) were protected against mortality and (90%) were protected against clinical disease following distemper challenge. Therefore, the data obtained from this study supports at least 4 year duration of immunity for these three "core" fractions in the combination vaccine.
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Because Murray had an unusual reaction to his 1 year boosters (he developed a 'sterile abcess' at the vaccination site), this year the vet checked his titres before we went ahead with his shots. His immunity was very high, so based on these results, we will be vaccinating him every 3 years rather than every year as long as the titre results support this.Thanks to everyone for the information in this thread, it's helped me to understand our situation a lot better.
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