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  • Title: Development of a contagious ecthyma vaccine for goats.
    Author: Musser JM, Taylor CA, Guo J, Tizard IR, Walker JW.
    Journal: Am J Vet Res; 2008 Oct; 69(10):1366-70. PubMed ID: 18828697.
    Abstract:
    OBJECTIVE: To identify a strain of contagious ecthyma virus from goats that possesses the appropriate characteristics for an effective vaccine for goats. ANIMALS: 25 goat kids used for vaccine development and 100 goat kids used for evaluation of vaccine efficacy. PROCEDURES: 5 strains of contagious ecthyma virus were tested in a vaccination-challenge study to identify the best strain to be the seed strain for a contagious ecthyma vaccine. The vaccine derived from the chosen viral stain was tested at 2 concentrations for efficacy in a vaccination-challenge study. RESULTS: 2 of 5 viral strains induced moderate to severe scabs following infection, and 3 viral strains protected the goats from wild-type virus challenge following vaccination. Viral strain 47CE was selected as the seed source for the production of a contagious ecthyma vaccine because of the larger vaccine-to-challenge scab formation ratio. Vaccine 47CE protected all goat kids (48/48) following challenge with the wild-type contagious ecthyma virus; all goat kids (32/32) in the control group had scab formation following challenge with the wild-type contagious ecthyma virus, which indicated no protection following administration of vaccine diluent. CONCLUSIONS AND CLINICAL RELEVANCE: A vaccine containing a caprine strain of contagious ecthyma virus used in goats appeared to provide the characteristics needed for an effective vaccine, including good scab production and protection from wild-type infection. This vaccine may potentially provide better protection for goats from contagious ecthyma than currently available vaccines labeled for sheep.
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