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Vaccine Comparison
BVDV DNA vaccine encoding E2 |
BVDV2 Modified Live Virus (MLV) Vaccine |
Vaccine Information |
Vaccine Information |
- Vaccine Ontology ID: VO_0004538
- Type: DNA vaccine
- Status: Research
- Host Species as Laboratory Animal Model: Calves
- Antigen: E2 from BVDV Q140 (van et al., 2013)
- E2
gene engineering:
- Type: DNA vaccine construction
- Detailed Gene Information: Click Here.
- Vector: pMASIA (van et al., 2013)
- Immunization Route: Intramuscular injection (i.m.)
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- Type: Modified Live Virus Vaccine
- Status: Research
- Host Species for Licensed Use: None
- Antigen: Bovine rhinotracheitis, BVDV (types 1 and 2), bovine parainfluenza-3, and bovine respiratory syncytial virus. (Zimmerman et al., 2006)
- Immunization Route: not specified
- Description: Adjuvanted modified-live bovine viral diarrhea virus (BVDV) vaccine protects against BVDV2. (Zimmerman et al., 2006)
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Host Response |
Host Response |
Cattle Response
- Vaccine Immune Response Type: VO_0000286
- Efficacy: Two doses of this vaccine spaced 6 or 12 weeks apart were sufficient to induce significant virus-neutralizing antibody titers, numbers of activated T cells, and reduction in viral shedding and clinical presentations after BVDV-2 challenge. In contrast to the placebo-treated animals, the vaccinated calves did not lose any weight, which is an excellent indicator of the well-being of an animal and has a significant economic impact (van et al., 2013).
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Cattle Response
- Vaccination Protocol: Twenty-one calves were vaccinated at approximately 5 weeks of age (day 0). Fourteen calves were vaccinated. The other 7 calves were sham vaccinated with sterile saline (0.9% NaCl) solutiong and served as controls. All calves were observed daily after vaccination for vaccine-related adverse events. Calves in group 1 were designated as control calves, calves in group 2 were designated as colostral antibody–negative and vaccinated, and calves in group 3 were designated a colostral antibody–positive and vaccinated. Calves in group 1 (n = 7) and group 2 (9) were fed 2 L of pooled colostrum that did not contain antibodies against BVDV within 6 hours of birth and were given a second 2-L feeding of colostrum 8 to 12 hours later. Calves in group 3 (n = 7) were given colostrum containing antibodies against BVDV. (Zimmerman et al., 2006)
- Immune Response: On the day of challenge (day 104), calves in group 1 were seronegative. Group 2 antibody responses continued to increase, with a mean BVDV type 1 serum neutralizing titer of 9.4log2 and a mean type 2 titer of 5.6log2. Titers in group 3 were decreased, compared with titers on day 28. Titers against type 1 virus decreased 1.9log2 to 5.8log2, and titers against type 2 virus decreased 2.8log2 to 4.2log2. The decreases in titers of both types of antibodies were significant (P < 0.05). At 1 week after challenge (day 111), control calves had begun to develop serum neutralizing antibody titers against BVDV type 2. Serum neutralizing antibody titers against type 2 virus in group 2 increased by 3.0log2 to 8.6log2 and increased by 0.2log2 to 4.4log2 in group 3. At 2 weeks after challenge (day 118), all 3 groups had increases (P < 0.05) in titers against both type 1 and 2 BVDV, compared with titers on day 111. (Zimmerman et al., 2006)
- Side Effects: Adverse vaccine reactions were not observed in any calves. (Zimmerman et al., 2006)
- Challenge Protocol: All 20 remaining calves received BVDV type 2 (strain 1373) intranasally by use of an atomizer 104 days after vaccination. The challenge inoculum contained 7.3 × 10^7 viral particles/mL, and 2.5 mL was atomized into each naris (total volume, 5.0 mL/calf). (Zimmerman et al., 2006)
- Efficacy: Calves that received colostrum free of antiBVDV antibodies and were vaccinated with the sham vaccine developed severe disease (4 of the 7 calves died or were euthanatized). Calves that received colostrum free of anti-BVDV antibodies and were vaccinated and calves that received colostrum with antiBVDV antibodies and were vaccinated developed only mild or no clinical signs of disease. (Zimmerman et al., 2006)
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References |
References |
van et al., 2013: van Drunen Littel-van den Hurk S, Lawman Z, Snider M, Wilson D, van den Hurk JV, Ellefsen B, Hannaman D. Two doses of bovine viral diarrhea virus DNA vaccine delivered by electroporation induce long-term protective immune responses. Clinical and vaccine immunology : CVI. 2013; 20(2); 166-173. [PubMed: 23220999].
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