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  • Title: Post-exposure serological and bacteriological responses of water buffalo (Bubalus bubalis) to Brucella abortus biovar 1 following vaccination with Brucella abortus strain RB51.
    Author: Diptee MD, Asgarali Z, Campbell M, Fosgate G, Adesiyun AA.
    Journal: Rev Sci Tech; 2007 Dec; 26(3):669-78. PubMed ID: 18293615.
    Abstract:
    Serological and bacteriological responses to Brucella abortus biovar 1 following vaccination with B. abortus strain RB51 (RB51) were evaluated in thirty domestic water buffalo (Bubalus bubalis) randomly divided into five treatment groups. Groups I to V received, respectively, the recommended dose (RD) of RB51 vaccine once, RD twice 4 weeks apart, double RD once, double RD twice 4 weeks apart, and saline once (control). Vaccination did not result in a serological response. Experimental animals released 27 weeks post initial inoculation (27 PIIW) into a brucellosis-positive herd failed to seroconvert after 29 weeks. Experimental challenge commenced at 57 PIIW. All animals received B. abortus biovar 1 intraconjunctivally at 0, 5 and 9 weeks post experimental exposure (PEEW). Serum samples collected at 4, 8 and 13 PEEW were negative. At 16 PEEW all animals received B. abortus biovar 1 subcutaneously (SC), and all seroconverted by 20 PEEW. Five of twenty-six animals were positive for Brucella infection on bacterial culture. Brucella abortus biovar 1 was isolated from three animals; B. abortus RB51 was isolated from two. Treatment group, age and sex had no effect on the isolation of Brucellae (P>0.05).
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