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- W3137054611 abstract "Abstract Background: A new candidate vector vaccine against human brucellosis based on recombinant influenza viral vectors (rIVV) subtypes H5N1 expressing Brucella Omp16, L7/L12, Omp19 or Cu-Zn SOD proteins has been developed. This paper presents the results of the study of the safety and protective properties of the vaccine with various options of administering, dosing and frequency of use on guinea pigs. Methods: The safety of the vaccine was assessed based on the general condition, behavior and dynamics of a guinea pig weight-gain test. The effectiveness of the new anti-brucellosis vector vaccine was determined by studying its protective effect after conjunctival, intranasal and sublingual administration in doses 10 5 EID 50 , 10 6 EID 50 and 10 7 EID 50 during prime and boost vaccinations of animals, followed by challenge with a virulent strain of B. mellitensis 16M infection. For sake of comparison, the commercial B. melitensis Rev.1 vaccine was used as a control. The protective properties of vaccines were assessed by quantitation of Brucella colonization in organs and tissues of infected animals and compared to the control groups. Results: It was found that the vaccine after prime and booster immunization using conjunctival, intranasal and sublingual routes of administration, as well as after using various doses of vaccine were safe for guinea pigs. The most optimal way of using the vaccine has been established: double intranasal immunization of guinea pigs at a dose of 10 6 EID 50 , which provides 80% protection of guinea pigs from B. melitensis 16M infection ( P < 0.05), which is comparable to the results of the effectiveness of the commercial B. melitensis Rev.1 vaccine. Conclusions: We developed effective vaccine candidate against brucellosis and developed its immunization protocol in guinea pig model. We believe that this study is a substantial step for using the vaccine for future pre-clinical and clinical trials in human." @default.
- W3137054611 created "2021-03-29" @default.
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- W3137054611 date "2020-10-13" @default.
- W3137054611 modified "2023-09-27" @default.
- W3137054611 title "A new candidate vaccine for human brucellosis based on influenza viral vectors: development of immunization schedule in guinea pig model" @default.
- W3137054611 doi "https://doi.org/10.21203/rs.3.rs-56762/v2" @default.
- W3137054611 hasPublicationYear "2020" @default.
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