Infectious bronchitis virus infection in chicken: viral load and immune responses in Harderian gland, choanal cleft and turbinate tissues compared to trachea

Al-Rasheed, M, Ball, C, Manswr, B, Leeming, G ORCID: 0000-0003-3409-399X and Ganapathy, K ORCID: 0000-0002-9401-3560 (2022) Infectious bronchitis virus infection in chicken: viral load and immune responses in Harderian gland, choanal cleft and turbinate tissues compared to trachea. BRITISH POULTRY SCIENCE, 63 (4). pp. 484-492.

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Official URL: http://dx.doi.org/10.1080/00071668.2022.2035675

Abstract

1. The role of the Harderian gland (HG), choanal cleft (CC) and turbinate in terms of IBV M41 viral load compared to the trachea, and immune (innate, cellular and mucosal) responses were studied in 21-day-old commercial broiler chickens.2. After virulent IBV M41 challenge, the antigen concentration detected either by quantitative RT-PCR or immunohistochemistry peaked at 2-3 days post challenge (dpc) in all tissues. Significant increases of lachrymal IBV-specific IgA and IgY levels were found at 4-5 dpc.3. Gene transcription showed a significant up-regulation of TLR3, MDA5, IL-6, IFN-α and IFN-β, where patterns and magnitude fold-change of <i>mRNA</i> transcription were dependent on the gene and tissue type.4. The results demonstrated active IBV M41 replication in the HG, CC and turbinate, comparable to levels of replication found in the trachea. Data on immune-related genes in head-associated tissues provide further understanding on the immunobiology of IBV and offer opportunities to identify their use as quantitative biomarkers in pathogenicity and vaccination-challenge studies.

Item Type:	Article
Uncontrolled Keywords:	Virus, immunity, head-associated lymphoid tissues, broilers
Divisions:	Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Infection, Veterinary and Ecological Sciences
Depositing User:	Symplectic Admin
Date Deposited:	07 Mar 2022 10:16
Last Modified:	18 Jan 2023 21:11
DOI:	10.1080/00071668.2022.2035675
Open Access URL:	https://doi.org/10.1080/00071668.2022.2035675
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3150285