e-ISSN 1828-1427 |
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Rivista trimestrale di Sanità
Pubblica Veterinaria edita dall'Istituto Zooprofilattico Sperimentale
dell'Abruzzo e del Molise G.
Caporale'
A quarterly journal devoted to veterinary public health, veterinary science and medicine published by the Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise ‘G. Caporale’ in Teramo, Italy |
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ISSUES ONLINE
2007
- Volume 43 (4)
October-December |
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Giovanni
Savini, Paola Nicolussi, Giovanantonio Pilo, Paolo Colorito, Sandra
Fresi, Liana Teodori, Alessandra Leone, Barbara Bonfini & Cristiana
Patta |
Study
of the safety and efficacy of a recombinant vaccine for bluetongue
virus serotype 2 |
815-820 |
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Summary
A
total of 7 cows, 10 sheep and 10 goats were vaccinated
subcutaneously with 5 ml of a recombinant vaccine consisting
of synthetic virions containing the four principal proteins (VP2,
VP3, VP5 and VP7) of bluetongue virus serotype 2 (BTV-2). The
same number of animals and species were vaccinated with 2.5 ml
(the normal vaccination dose) and 2 cows, 2 sheep and 2 goats
were inoculated with a placebo and the adjuvant added to the vaccine.
Animals vaccinated with the normal dose received a booster 14 days
after the first injection and 8 sheep a third vaccination 4 months
after the second inoculation. One month after the third vaccination,
the 8 sheep and another 4 that had never come into contact
with the virus were challenged with 1 ml of 105.8 TCID50
of a BTV-2 Italian field isolate. All animals showed competitive enzyme-linked
immunosorbent assay (c-ELISA) antibodies starting 14 days following
the first vaccination. Conversely, no animal demonstrated neutralising
antibodies to BTV-2 after vaccination. Fever (>40°C) was observed
in 6 vaccinated animals and 2 controls between 8 and
13 days post challenge. The virus was isolated from all animals
from the 7th day post challenge. There was no significant difference
in the blood chemical parameters tested and no significant interaction
was found in the trial group.
Keywords
Bluetongue,
Cattle, Goats, Italy, Sheep, Vaccine.
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