Brucella abortus RB51 in milk of vaccinated adult cattle.

The aim of this study was to evaluate the shedding of Brucella abortus in the milk of cows vaccinated with a full dose of RB51 during lactation. Eighteen cows, nine previously vaccinated with S19 as calves and nine non-vaccinated, were immunized subcutaneously with 1.3×10(10)CFU of B.

Brucella abortus S19 and RB51 vaccine immunogenicity test: Evaluation of three mice (BALB/c, Swiss and CD-1) and two challenge strains (544 and 2308).

The aim of the present study was to evaluate the use of different mouse strains (BALB/c, Swiss and CD-1) and different challenge strains (Brucella abortus 544 and 2308) in the study of B. abortus vaccine (S19 and RB51) immunogenicity test in the murine model. No significant difference in B.

Evaluation of Brucella abortus S19 vaccines commercialized in Brazil: immunogenicity, residual virulence and MLVA15 genotyping.

Live attenuated Brucella abortus S19 is the most effective vaccine against brucellosis in cattle. The assessment of the immunological parameters is essential to guarantee the biological quality of live anti-bacteria vaccines. The evaluation of genetic stability of live bacterial vaccines is also important in quality control.

Evaluation of direct fluorescent antibody test for the diagnosis of bovine genital campylobacteriosis.

The direct fluorescent antibody test (DFAT) for the diagnosis of Bovine Genital Campylobacteriosis was assessed for its detection limit, observer effect, sensitivity and specificity. In addition, the specificity of the fluorescent conjugate was tested against Campylobacter sp, Arcobacter sp, Helicobacter sp, E. coli and other bacteria from the preputial flora.