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Characterization of humoral immune responses and degree of protection induced by influenza vaccine in cotton rats: Effects of low vaccine dose and single vs booster vaccination

Bhide, Y., Dong, W., Meijerhof, T., de Vries-Idema, J., Niesters, H. G. & Huckriede, A., 22-Apr-2020, In : Immunity, inflammation and disease. 8, 3, p. 279-291 13 p.

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Introduction: Cotton rats are a suitable model for the study of influenza disease symptoms and responses to influenza vaccination. We have previously shown that two immunizations with 15 µg whole inactivated virus (WIV) influenza vaccine could completely protect animals from infection with the H1N1pdm09 virus. Methods: To further explore the cotton rat model, we here investigated the protective potential of a single intramuscular immunization and of prime/boost intramuscular immunizations with a low amount of antigen. Results: A single intramuscular immunization with doses more than or equal to 0.5 µg WIV reliably evoked antibody responses and doses more than or equal to 1 µg protected the animals from virus replication in the lungs and from severe weight loss. However, clinical symptoms like an increased respiration rate were still apparent. Administration of a booster dose significantly increased the humoral immune responses but did not or only moderately improved protection from clinical symptoms. Conclusion: Our data suggest that complete and partial protection by influenza vaccines can be mimicked in cotton rats by using specific vaccination regimens.

Original languageEnglish
Pages (from-to)279-291
Number of pages13
JournalImmunity, inflammation and disease
Volume8
Issue number3
Publication statusPublished - 22-Apr-2020

    Keywords

  • cotton rats, humoral immune response, lung viral load, respiration rate, virus challenge, whole inactivated virus (WIV) influenza vaccine, SMALL-ANIMAL-MODEL, SIGMODON-HISPIDUS, MX PROTEINS, VIRUS, PATHOGENESIS, INFECTION, EFFICACY

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