Adenovirus-vectored African Swine Fever Virus Antigens Cocktail Is Not Protective against Virulent Arm07 Isolate in Eurasian Wild Boar

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Cadenas Fernández, Estefanía and Sánchez-Vizcaíno, José Manuel and Kosowska, Aleksandra and Rivera Arroyo, Belén and Mayoral Alegre, Francisco José and Rodríguez Bertos, Antonio Manuel and Yao, Jianxiu and Bray, Jocelyn and Lokhandwala, Shehnaz and Mwangi, Waithaka and Barasona García-Arévalo, José Ángel (2020) Adenovirus-vectored African Swine Fever Virus Antigens Cocktail Is Not Protective against Virulent Arm07 Isolate in Eurasian Wild Boar. Pathogens, 9 (3). p. 171. ISSN 2076-0817

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Official URL: https://doi.org/10.3390/pathogens9030171




Abstract

African swine fever (ASF) is a viral disease of domestic and wild suids for which there is currently no vaccine or treatment available. The recent spread of ASF virus (ASFV) through Europe and Asia is causing enormous economic and animal losses. Unfortunately, the measures taken so far are insufficient and an effective vaccine against ASFV needs to be urgently developed. We hypothesized that immunization with a cocktail of thirty-five rationally selected antigens would improve the protective efficacy of subunit vaccine prototypes given that the combination of fewer immunogenic antigens (between 2 and 22) has failed to elicit protective efficacy. To this end, immunogenicity and efficacy of thirty-five adenovirus-vectored ASFV antigens were evaluated in wild boar. The treated animals were divided into different groups to test the use of BioMize adjuvant and different inoculation strategies. Forty-eight days after priming, the nine treated and two control wild boar were challenged with the virulent ASFV Arm07 isolate. All animals showed clinical signs and pathological findings consistent with ASF. This lack of protection is in line with other studies with subunit vaccine prototypes, demonstrating that there is still much room for improvement to obtain an effective subunit ASFV vaccine.


Item Type:Article
Uncontrolled Keywords:African swine fever; adenovirus; Armenia07/Arm07; Eurasian wild boar; immune response; subunit vaccine; protective efficacy
Subjects:Medical sciences > Veterinary > Feral and exotic animals
Medical sciences > Veterinary > Swine
Medical sciences > Veterinary > Veterinary immunology
ID Code:65117
Deposited On:27 Apr 2021 17:54
Last Modified:28 Apr 2021 07:29

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