Brucella antigen

Brucella antigens represent a collection of molecular structures from Brucella species that are recognized by the host immune system, serving as the primary targets for both diagnostic testing and vaccine development. The most prominent among these are the lipopolysaccharides (LPS), particularly the smooth LPS (S-LPS), and a variety of outer membrane proteins (OMPs) such as Omp25, Omp31, and Omp19 (Seleem et al., 2010, PubMed). These antigens are crucial for the pathogen's intracellular survival and its ability to modulate host immune signaling to establish chronic infection (Guzman-Verri et al., 2002, PubMed). In veterinary medicine, live-attenuated vaccines like S19 and RB51 utilize these antigens to confer long-term immunity, though their use is limited by the risk of human infection and interference with diagnostic serology (Schurig et al., 2002, PubMed). Diagnostic assays, including the Rose Bengal test and ELISA, rely on the specific binding of host antibodies to these antigens to identify exposure or active infection (Godfroid et al., 2010, PubMed). Current research focuses on recombinant subunit vaccines and DNA vaccines targeting specific Brucella antigens to improve safety and allow for the differentiation of infected from vaccinated animals (DIVA) (Lalsiamthara et al., 2018, PubMed). Understanding the structural variations of these antigens is essential for developing next-generation therapeutics that can overcome the challenges of zoonotic transmission and diagnostic cross-reactivity.

Other names

Brucella surface antigensBrucella outer membrane proteinsBrucella lipopolysaccharideBrucella abortus antigensBrucella melitensis antigensBrucella Ag

Induction of protective humoral and cell-mediated immunity through the presentation of bacterial epitopes to the host immune system (Lalsiamthara et al., 2018, PubMed).