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Analysis of Protection and Immune Response against Teladorsagia circumcincta in Goats Immunised with Thiol-Binding Proteins from Adult Worms.

Authors :
Ortega L
Quesada J
Ruiz A
Conde-Felipe MM
Ferrer O
Muñoz MDC
Molina JA
Rodríguez F
Molina JM
Source :
Vaccines [Vaccines (Basel)] 2024 Apr 18; Vol. 12 (4). Date of Electronic Publication: 2024 Apr 18.
Publication Year :
2024

Abstract

In view of the increasing occurrence of anthelmintic-resistant strains of gastrointestinal nematodes in ruminants, various alternative control strategies have been investigated, such as those based on the induction of protective immune responses by immunisation with parasite antigens. In this study, the protective activity of somatic antigens from adult worms of Teladorsagia circumcincta purified by affinity chromatography on thiol-sepharose was analysed in goats. After challenge, the enriched products induced a slight reduction in the cumulative faecal egg counts (21%) and in the number of worms (23.3%), with a greater effect on female worms, which also showed a reduction in parameters related to their fertility. These parasitological findings were associated with a Th2 immune response, with a prominent local humoral response and an eosinophilic infiltrate in the gastric mucosa (negatively associated with the fertility of female worms and the number of worms, respectively), as well as an infiltration of MCHII+, CD4+, IgG+ and IgA+ cells. However, several analyses showed an increase in CD8+ cells in the mucosa, as well as IL-2 expression in the gastric lymph nodes, which may have been associated with inhibition of protective responses or with the development of mixed Th1/Th2 responses, a finding that should be analysed in future studies.

Details

Language :
English
ISSN :
2076-393X
Volume :
12
Issue :
4
Database :
MEDLINE
Journal :
Vaccines
Publication Type :
Academic Journal
Accession number :
38675819
Full Text :
https://doi.org/10.3390/vaccines12040437