The ompA codon was adapted to the codon usage in birds, resulting in pcDNA1/MOMP(opt). Researchers examined the capacity of nebulised or intramuscularly (IM) administered brPEI-pcDNA1/MOMP(opt) to induce a significant protective immune response in SPF turkeys experimentally infected with 10^8 TCID(50) of a virulent Cp. psittaci strain. Vaccinated groups were significantly protected against Cp. psittaci challenge (Verminnen et al., 2010).
