The potential for vaccines against scour worms of small ruminants

Britton, C. , Emery, D. L., Mcneilly, T., Nisbet, A. and Stear, M. J. (2020) The potential for vaccines against scour worms of small ruminants. International Journal for Parasitology, 50(8), pp. 533-553. (doi: 10.1016/j.ijpara.2020.04.003) (PMID:32569640)

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This review addresses the research landscape regarding vaccines against scour worms, particularly Trichostrongylus spp. and Teladorsagia circumcincta. The inability of past research to deliver scour-worm vaccines with reliable and reproducible efficacy has been due in part to gaps in knowledge concerning: (i) host-parasite interactions leading to development of type-2 immunity, (ii) definition of an optimal suite of parasite antigens, and (iii) rational formulation and administration to induce protective immunity against gastrointestinal nematodes (GIN) at the site of infestation. Recent ‘omics’ developments enable more systematic analyses. GIN genomes are reaching completion, facilitating “reverse vaccinology” approaches that have been used successfully for the Rhipicephalus australis vaccine for cattle tick, while methods for gene silencing and editing in GIN enable identification and validation of potential vaccine antigens. We envisage that any efficacious scour worm vaccine(s) would be adopted similarly to “Barbervax™” within integrated parasite management schemes. Vaccines would therefore effectively parallel the use of resistant animals, and reduce the frequency of drenching and pasture contamination. These aspects of integration, efficacy and operation require updated models and validation in the field. The conclusion of this review outlines an approach to facilitate an integrated research program.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Nisbet, Dr Alasdair and Mcneilly, Dr Tom and Britton, Professor Collette
Authors: Britton, C., Emery, D. L., Mcneilly, T., Nisbet, A., and Stear, M. J.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:International Journal for Parasitology
ISSN (Online):1879-0135
Published Online:20 June 2020
Copyright Holders:Copyright © 2020 The Author(s)
First Published:First published in International Journal for Parasitology 50(8):53-553
Publisher Policy:Reproduced under a Creative Commons license

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