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Abdelkhalek AF, Kayed A, Moatasim Y, El Sayes M, El-Shesheny R, Khalil AA, El-Deeb A, Hussein HA, El-Sanousi AA, Kayali G, Ali MA, Kandeil A. Efficiency of natural oils as alternative adjuvants to mineral oils in inactivated avian influenza vaccine formulation. Br Poult Sci 2024; 65:28-33. [PMID: 38038674 DOI: 10.1080/00071668.2023.2290557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 11/05/2023] [Indexed: 12/02/2023]
Abstract
1. The effectiveness of inactivated vaccines depends on selecting the suitable adjuvant for vaccine formulation. The potency of vaccines with low antigen content can be improved with the appropriate adjuvant. This could allow production of more doses and lower the production cost.2. This study evaluated the efficiency of vaccines prepared using oil extracted from natural sources including argan oil, almond oil, sesame seed oil, pumpkin oil, cactus oil and black seed oil as alternative adjuvants for improving the protection capacity of inactivated influenza virus vaccine as compared to commonly used mineral oils.3. Each vaccine formulation was evaluated for stability, safety and immunogenicity in chickens, as well as for reducing the viral shedding after challenge infection.4. The cactus, sesame and pumpkin seed oil-based vaccines were found to be potent and successfully induced the production of humoral immunity in vaccinated chickens.
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Affiliation(s)
- A F Abdelkhalek
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - A Kayed
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, Egypt
| | - Y Moatasim
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, Egypt
| | - M El Sayes
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, Egypt
| | - R El-Shesheny
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, Egypt
| | - A A Khalil
- Agricultural Research Center, Veterinary Serum and Vaccine Research Institute, Cairo, Egypt
| | - A El-Deeb
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - H A Hussein
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - A A El-Sanousi
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - G Kayali
- Human Link, Dubai, United Arab Emirates
| | - M A Ali
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, Egypt
| | - A Kandeil
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, Egypt
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Perera RA, Wang P, Gomaa MR, El-Shesheny R, Kandeil A, Bagato O, Siu LY, Shehata MM, Kayed AS, Moatasim Y, Li M, Poon LL, Guan Y, Webby RJ, Ali MA, Peiris JS, Kayali G. Seroepidemiology for MERS coronavirus using microneutralisation and pseudoparticle virus neutralisation assays reveal a high prevalence of antibody in dromedary camels in Egypt, June 2013. Euro Surveill 2013; 18:pii=20574. [DOI: 10.2807/1560-7917.es2013.18.36.20574] [Citation(s) in RCA: 250] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We describe a novel spike pseudoparticle neutralisation assay (ppNT) for seroepidemiological studies on Middle East respiratory syndrome coronavirus (MERS-CoV) and apply this assay together with conventional microneutralisation (MN) tests to investigate 1,343 human and 625 animal sera. The sera were collected in Egypt as a region adjacent to areas where MERS has been described, and in Hong Kong, China as a control region. Sera from dromedary camels had a high prevalence of antibody reactive to MERS-CoV by MERS NT (93.6%) and MERS ppNT (98.2%) assay. The antibody titres ranged up to 1,280 and higher in MN assays and 10,240 and higher in ppNT assays. No other investigated species had any antibody reactivity to MERS-CoV. While seropositivity does not exclude the possibility of infection with a closely related virus, our data highlight the need to attempt detection of MERS-CoV or related coronaviruses in dromedary camels. The data show excellent correlation between the conventional MN assay and the novel ppNT assay. The newly developed ppNT assay does not require Biosafety Level 3 containment and is thus a relatively high-throughput assay, well suited for large-scale seroepidemiology studies which are needed to better understand the ecology and epidemiology of MERS-CoV.
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Affiliation(s)
- R A Perera
- These authors contributed equally to the work and are joint first authors
- Centre of Influenza Research, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - P Wang
- Key Laboratory of Protein and Peptide Pharmaceuticals, Chinese Academy of Sciences - University of Tokyo Joint Laboratory of Structural Virology and Immunology, Beijing, China
- Hong Kong University-Pasteur Research Pole, The University of Hong Kong, Hong Kong, China
- These authors contributed equally to the work and are joint first authors
| | - M R Gomaa
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - R El-Shesheny
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - A Kandeil
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - O Bagato
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - L Y Siu
- Hong Kong University-Pasteur Research Pole, The University of Hong Kong, Hong Kong, China
| | - M M Shehata
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - A S Kayed
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - Y Moatasim
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - M Li
- Hong Kong University-Pasteur Research Pole, The University of Hong Kong, Hong Kong, China
| | - L L Poon
- Centre of Influenza Research, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Y Guan
- Centre of Influenza Research, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - R J Webby
- Division of Virology, Department of Infectious Diseases, St Jude Children’s Research Hospital, Memphis, United States
| | - M A Ali
- Division of Environmental Research, National Research Centre, Giza, Egypt
| | - J S Peiris
- Centre of Influenza Research, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - G Kayali
- Division of Virology, Department of Infectious Diseases, St Jude Children’s Research Hospital, Memphis, United States
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