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Viruses 2017, 9(8), 216; doi:10.3390/v9080216

An Inactivated Novel Genotype Fowl Adenovirus 4 Protects Chickens against the Hydropericardium Syndrome That Recently Emerged in China

1
State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin 150001, China
2
Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou 225009, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Curt Hagedorn
Received: 10 June 2017 / Revised: 2 August 2017 / Accepted: 6 August 2017 / Published: 8 August 2017
(This article belongs to the Section Antivirals & Vaccines)
View Full-Text   |   Download PDF [7760 KB, uploaded 9 August 2017]   |  

Abstract

Since 2015, China has experienced outbreaks of severe hydropericardium syndrome (HPS), associated with a novel genotype and hypervirulent fowl adenovirus serotype 4 (FAdV-4) infection, with a prevalence in various provinces of the country. This has resulted in huge economic losses in the poultry industry. The novel FAdV-4 showed new genome characters, such as the natural deletion of open reading frame (ORF) 19 and ORF 27 (1966 bp), and high pathogenicity toward chickens. These are coupled with severe hydropericardium, inclusion body hepatitis, and mortality rates ranging from 30% to 90%. Although several inactivated and subunit vaccines against the traditional FAdV-4 have been developed, no commercial vaccine against the emerged disease caused by the novel strain has been available until now. The potential risks of infection with this novel hypervirulent FAdV-4 urgently require an effective vaccine. Thus, an inactivated oil-emulsion FAdV-4 vaccine formulated with the novel genotype virus was developed in this study. The vaccine provided a high level of antibody, preferential T helper 2 (Th2) (interleukin-4 secretion) not Th1 (interferon-γ secretion) response, and full protection against a lethal dose of the novel hypervirulent FAdV-4. Therefore, the novel genotype FAdV-4 vaccine is proposed as an attractive candidate to prevent and reduce the spread of HPS in the poultry industry of China. View Full-Text
Keywords: novel FAdV-4; hypervirulent; hydropericardium syndrome; Th2 response; chickens novel FAdV-4; hypervirulent; hydropericardium syndrome; Th2 response; chickens
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MDPI and ACS Style

Pan, Q.; Yang, Y.; Gao, Y.; Qi, X.; Liu, C.; Zhang, Y.; Cui, H.; Wang, X. An Inactivated Novel Genotype Fowl Adenovirus 4 Protects Chickens against the Hydropericardium Syndrome That Recently Emerged in China. Viruses 2017, 9, 216.

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