has role protective antigen role protective antigen Chlamydophila psittaci protein MOMP from C. psittaci Protegen ID: 767; NCBI Nucleotide GI: 144544; NCBI Protein GI: 144545; NCBI Protein Accession: AAA17396.1; NCBITaxon: 83554 Oliver He Plasmid DNA (pcDNA1::MOMP A) expressing the major outer membrane protein (MOMP) of Chlamydophila psittaci genotype A strain 89/1051 has been tested for its ability to induce protective immunity against Cp. psittaci challenge in budgerigars. DNA immunisation significantly reduced clinical signs, macroscopic lesions, pharyngeal and cloacal excretion as well as chlamydial replication, even in the presence of pre-existing serum antibodies, as compared to the placebo-vaccinated controls [PubMed: 19640395]. Allen Xiang protein