Original scientific paper

https://doi.org/10.24099/vet.arhiv.160113

Modified schedule of vaccination with polyvalent bovine viral diarrhea virus inactivated vaccine in dairy herds - a field study

Tomislav Bedeković ; Croatian Veterinary Institute, Zagreb, Croatia
Nina Krešić ; Croatian Veterinary Institute, Zagreb, Croatia
Ivana Lojkić ; Croatian Veterinary Institute, Zagreb, Croatia
Ivana Šimić ; Croatian Veterinary Institute, Zagreb, Croatia
Željko Cvetnić ; Croatian Veterinary Institute, Zagreb, Croatia
Josip Madić ; Department of Microbiology and Infectious Diseases with Clinic, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia

Abstract

In order to reduce the cost of vaccination, three herds were vaccinated with polyvalent bovine viral diarrhea virus inactivated vaccine according to a modified schedule, and the specific antibody response was evaluated. In each herd only the cows and heifers were vaccinated with one dose of vaccine. Two herds (A and B) were vaccinated annually for three consecutive years. The third herd (C) was vaccinated twice with a two year interval. At the beginning of the study the herds consisted of 38, 22 and 15 animals respectively. Antibody response was evaluated three and nine months after vaccination with indirect ELISA, blocking ELISA and a virus neutralization test. Within herds A and B the percentage of seropositive animals increased with each subsequent vaccination. Three months after the third vaccination more than 96% of animals in herds A and B were seropositive. Nine months after the third vaccination more than 56% of animals in herds A and B were seropositive. Three and nine months after the second vaccination the numbers of positive animals in herd C was 66% and 38% respectively. The obtained results show that the percentage of seropositive animals within the herds increased with each vaccination and the best detection of specific antibodies after vaccination can be achieved if a virus neutralization test is used. Also, the results show that seroprotection of cows within the herds vaccinated yearly was significantly higher (56.52-58.82%) compared to the herd vaccinated with a two year interval (38.88%).

Keywords

bovine viral diarrhea; vaccination; modified schedule

Hrčak ID:

180765

URI

https://hrcak.srce.hr/180765

Publication date:

3.5.2017.

Article data in other languages: croatian

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