Heterogeneity of Early Host Response to Infection with Four Low-Pathogenic H7 Viruses with a Different Evolutionary History in the Field

Gianpiero Zamperin, Alice Bianco, Jacqueline Smith, Alessio Bortolami, Lonneke Vervelde, Alessia Schivo, Andrea Fortin, Sabrina Marciano, Valentina Maria Panzarin, Eva Mazzetto, Adelaide Milani, Yohannes Berhane, Paul Digard, Francesco Bonfante, Isabella Monne

Research output: Contribution to journalArticlepeer-review

Abstract

Once low-pathogenic avian influenza viruses (LPAIVs) of the H5 and H7 subtypes from wild birds enter into poultry species, there is the possibility of them mutating into highly pathogenic avian influenza viruses (HPAIVs), resulting in severe epizootics with up to 100% mortality. This mutation from a LPAIV to HPAIV strain is the main cause of an AIV’s major economic impact on poultry production. Although AIVs are inextricably linked to their hosts in their evolutionary history, the contribution of host-related factors in the emergence of HPAI viruses has only been marginally explored so far. In this study, transcriptomic sequencing of tracheal tissue from chickens infected with four distinct LP H7 viruses, characterized by a different history of pathogenicity evolution in the field, was implemented. Despite the inoculation of a normalized infectious dose of viruses belonging to the same subtype (H7) and pathotype (LPAI), the use of animals of the same age, sex and species as well as the identification of a comparable viral load in the target samples, the analyses revealed a heterogeneity in the gene expression profile in response to infection with each of the H7 viruses administered.
Original languageEnglish
JournalViruses
Volume13
Issue number11
Early online date21 Nov 2021
DOIs
Publication statusE-pub ahead of print - 21 Nov 2021

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