Strongyle Infection and Gut Microbiota: Profiling of Resistant and Susceptible Horses Over a Grazing Season.
- Journal Article
Summary
The study examines the link between gastrointestinal strongyles (parasites) and the gut microbiota in horses, and how these interactions could be the reason for varying susceptibility to infection in different horses. The focus is on assessing how the infection’s development and resistance varies in horses and its impact on their health.
Research Methodology
The approach of the study involved a pasture trial with 20 female Welsh ponies that were free from worms. These ponies were divided into two groups – susceptible (S) and resistant (R) – based on their susceptibility to parasite infection. The experiment spanned over five months during which the health metrics of the ponies were observed.
- The parameters studied were fecal egg counts (FEC), hematological and biochemical data, body weight, and gut microbiological composition.
- These attributes were studied at different points, specifically at the start, after 24, 43, 92, and 132 grazing days.
Findings
Divergent Immunological Profiles and Microbiological Composition
- The susceptible (S) and resistant (R) ponies exhibited different immune reactions and slight differences in their gut microbiological composition under worm-free conditions.
Effects of Natural Infection Exposure
- After being exposed to natural infection, the R ponies showed lower FEC counts after 92 and 132 grazing days and maintained higher levels of circling monocytes and eosinophils, while S ponies displayed persistent lymphocytosis.
Differences in Gut Microbiota
- While the overall gut microbiota diversity and structure remained similar between the two groups during the parasite infection, S ponies exhibited a reduction in certain types of bacteria, which might have caused a disruption in mucosal homeostasis.
- S ponies also showed an increase in pathobionts (potentially harmful microbes) along with changes in several predicted immunological pathways involved in sensing pathogens, lipid metabolism, and signal transduction.
- This group also experienced an increase in protozoan concentrations at day 92 which is likely to suggest that strongyles and protozoa might be promoting each other’s success in the horse intestines.
Conclusion
Based on the findings, the study lays the groundwork for understanding the relationship between horses and natural strongyle infections. The research proposes that the profiling of a horse’s immune response and gut microbiota could contribute to the development of new biomarkers indicative of strongyle infection. It was also suggested that susceptible horses might enhance carbohydrate-degrading microorganisms to boost nutrient supply in fighting against the strongyle infection.
Cite This Article
Publication
Researcher Affiliations
- Department of Health Science, Open University of Catalonia, Barcelona, Spain.
- UMR 1282, Institut National de la Recherche Agronomique, Infectiologie et Santé Publique, Université François-Rabelais, Nouzilly, France.
- UMR 1313, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France.
- UEPAO 1297, Institut National de la Recherche Agronomique, Unité Expérimentale de Physiologie Animale de l'Orfrasière, Nouzilly, France.
- UMR 1388, Institut National de la Recherche Agronomique, GenPhySE, Toulouse, France.
- UMR 1282, Institut National de la Recherche Agronomique, Infectiologie et Santé Publique, Université François-Rabelais, Nouzilly, France.
- UMR 1282, Institut National de la Recherche Agronomique, Infectiologie et Santé Publique, Université François-Rabelais, Nouzilly, France.
- UE-1277, Institut National de la Recherche Agronomique, Plate-Forme d'Infectiologie Expérimentale, Nouzilly, France.
- UMR 1282, Institut National de la Recherche Agronomique, Infectiologie et Santé Publique, Université François-Rabelais, Nouzilly, France.
- Pancosma SA, Geneva, Switzerland.
- UMR 1313, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France.
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