Article ; Online: Avian metapneumovirus subtype B vaccination in commercial broiler chicks: heterologous protection and selected host transcription responses to subtype A or B challenge.
Avian pathology : journal of the W.V.P.A
2022 Volume 51, Issue 2, Page(s) 181–196
Abstract: ... in vaccinated or unvaccinated broiler chickens is poorly characterized. We show that subtype B vaccination ... offers heterologous (subtype A challenge) and homologous (subtype B challenge) protection. Subtype B ... significantly up-regulated after subtype B challenge compared to subtype A. Cellular immunity (CD8-α and CD8-β ...
Abstract | Avian metapneumovirus (aMPV) causes respiratory disease and drops in egg production in chickens, and is routinely controlled by vaccination. However, the host's immune response to virulent challenge in vaccinated or unvaccinated broiler chickens is poorly characterized. We show that subtype B vaccination offers heterologous (subtype A challenge) and homologous (subtype B challenge) protection. Subtype B challenge caused significantly greater humoral antibody titres in vaccinated and unvaccinated chickens. In turbinate and lung tissues of unvaccinated-challenged chickens, IgA and IgY mRNA transcription was significantly up-regulated after subtype B challenge compared to subtype A. Cellular immunity (CD8-α and CD8-β) gene transcripts were significantly up-regulated during early and later stages of infection from subtype B or subtype A, respectively. Immune gene transcriptional responses (IL-1β, IL-6 and IL-18) were significantly up-regulated after challenge. Gene transcription results showed that mRNA expression levels of CD8-α, CD8-β, TLR3 and IL-6, particularly in turbinate and trachea tissues, are useful parameters to include in future aMPV vaccination-challenge studies. |
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MeSH term(s) | Animals ; Antibodies, Viral ; Chickens ; Immunity, Cellular ; Metapneumovirus/genetics ; Paramyxoviridae Infections/prevention & control ; Paramyxoviridae Infections/veterinary ; Poultry Diseases ; Vaccination/veterinary |
Chemical Substances | Antibodies, Viral |
Language | English |
Publishing date | 2022-02-21 |
Publishing country | England |
Document type | Journal Article |
ZDB-ID | 1476380-1 |
ISSN | 1465-3338 ; 0307-9457 |
ISSN (online) | 1465-3338 |
ISSN | 0307-9457 |
DOI | 10.1080/03079457.2022.2036697 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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