Genetic immunization was used to functionally test the genes of C. abortus as vaccines in a mouse challenge system. Protective clone CP #4 (OMP90A, pomp90A) was diluted 1/2000 in a non-protective sublibrary pool of clones. This CP #4-spiked sublibrary conferred protection. Five clones were significantly more protective than the genes encoding fewer than 50 amino acids (CP #1–5 and 7, p-value of less than 0.05 when comparing lung weights). (Stemke-Hale et al., 2005).
Stemke-Hale et al., 2005: Stemke-Hale K, Kaltenboeck B, DeGraves FJ, Sykes KF, Huang J, Bu CH, Johnston SA. Screening the whole genome of a pathogen in vivo for individual protective antigens. Vaccine. 2005; 23(23); 3016-3025. [PubMed: 15811648].