The EG95 vaccine is effective in protecting grazing animals from infection with Echinococcus granulosus. Six male lambs were used in the study, two were each vaccinated subcutaneously with 50μg EG95/1mg Quil-A, two animals were each vaccinated with 50μg EG95/1mg Quil-A in 1% chitosan thermolabile gel subcutaneously, and two animals served as non-vaccinated controls. Two vaccinations were given at a 7 week interval. Two vaccinations induced a significantly higher antibody titre in the chitosan group compared with the Quil-A only group. The chitosan vaccine group also had a significantly higher antibody titre compared with a positive control sera from vaccinated and challenged sheep. Incorporating the EG95/Quil-A vaccine in a thermo-responsive chitosan sol-gel stimulated, after the second injection, a high level of antibody absorbance which remained high for at least one year. This response was significantly greater than the response to vaccine without the gel.
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