Immune efficacy of OmpH and OmpA DNA vaccines against avian Pasteurella multocida
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Abstract:
Avian Pasteurella multocida is an agent of fowl cholera. The protective effect achieved through orthodoxvaccines is not ideal. The research on novel vaccines against avian Pasteurella multocida is imperative. Inthis study, the genes encoding outer membrane protein H and A (OmpH and OmpA) were cloned into theeukaryotic expression vector pcDNA3.1(+) and the recombinant plasmids, namely DNA vaccines (pOMPH andpOMPA) were obtained. Five groups of chickens (n=20 per group) were intramuscularly injected with thetwo recombinant plasmids, attenuated live vaccine, control vector pcDNA3.1(+) and PBS, respectively. Theimmune responses and protective efficacy were evaluated after immunization by serological and challenging.A significant increase in serum antibody levels was observed in chickens vaccinated with the attenuated livevaccine and the two DNA vaccines. Additionally, the lymphocyte proliferation (SI values) were higher inchickens immunized with the attenuated live vaccine and the two DNA vaccines than in those vaccinatedwith pcDNA3.1(+) and PBS (P
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immune efficacy of omph and ompa dna vaccines against avian pasteurella multocida
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Journal title
volume 14 issue 3
pages 197- 202
publication date 2013-09-30
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