Abstract:
BACKGROUND:Caseous Lymphadenitis (CLA) is a contagious, infectious, chronic disease caused by Corynebacterium pseudotuberculosis, which affects mainly sheep and goats. The clinical prevalence of CLA in Brazil is 30%, resulting in decreased milk production, weight loss, and unusable meat and leather. Prophylaxis is based on vaccination; however, current vaccinations do not offer effective protection against the infection, which makes the development of a new vaccine essential to control this disease. EXPERIMENTAL APPROACH:Here, we developed a recombinant vaccine based on CP40 protein (rCP40) combined with an adjuvant (Freund's complete adjuvant or saponin) and evaluated its efficacy in a murine model of CLA. Female BALB/c mice were used in an immunization assay. KEY RESULTS:rCP40 induced high levels of IgG2a and IgG2b antibodies. After challenge with a virulent strain of C. pseudotuberculosis C57 (10(4)CFU/mL), the levels of IgG2a and IgG2b were sustained, indicating a Th1 response. The groups immunized with rCP40 protein (GES and GEF groups) showed 100% protection and was statistically significant in the GES and GEF groups (p<0.037 and p<0.0952, respectively). CONCLUSIONS:The results indicated the recombinant protein CP40 induced an specific immune response in mice that was able to afford protection after challenge, regardless the adjuvant used in the formulation.
journal_name
Vaccinejournal_title
Vaccineauthors
Droppa-Almeida D,Vivas WL,Silva KK,Rezende AF,Simionatto S,Meyer R,Lima-Verde IB,Delagostin O,Borsuk S,Padilha FFdoi
10.1016/j.vaccine.2015.12.064subject
Has Abstractpub_date
2016-02-17 00:00:00pages
1091-6issue
8eissn
0264-410Xissn
1873-2518pii
S0264-410X(15)01875-7journal_volume
34pub_type
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