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Serum protein changes in ponies on different parasite control programmes.

R P Herd, J E Kent

    Equine Veterinary Journal
    |November 1, 1986
    PubMed
    Summary
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    Serum protein and immunoglobulin responses in ponies varied with parasite type and age. Young ponies showed significant changes, but overall, these responses were of limited diagnostic value for parasitism.

    Area of Science:

    • Veterinary Parasitology
    • Equine Health
    • Immunology

    Background:

    • Pasture-acquired parasitic infections are common in equids.
    • Cyathostome and Trichostrongylus axei infections impact pony health.
    • Serum protein profiles can indicate physiological stress in animals.

    Purpose of the Study:

    • To investigate serum protein and immunoglobulin G(T) responses in ponies exposed to varying levels of pasture larvae.
    • To determine the influence of parasite type (T. axei vs. cyathostomes) and pony age on these responses.
    • To evaluate the diagnostic utility of serum protein analysis in equine parasitism.

    Main Methods:

    • Fifty-two ponies were divided into five groups with different pasture infectivity levels (706–18,486 L3/kg).
    • Serum samples were collected and analyzed for protein and immunoglobulin G(T) concentrations.

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  • Ponies were treated with ivermectin, and subsequent changes in serum parameters were monitored.

    • Main Results:

    • Major serum protein changes were observed primarily in young ponies before peak larval exposure.
    • Trichostrongylus axei infection stimulated greater beta-globulin and IgG(T) responses than cyathostomes.
    • Ivermectin treatment led to decreased beta-globulin and IgG(T), suggesting larvicidal action, and increased albumin, indicating alleviation of protein-losing gastroenteropathy.
    • Mature ponies showed minimal beta-globulin and modest IgG(T) responses to heavy infection.

    Conclusions:

    • Serum protein and IgG(T) responses are influenced by pony age and specific parasite species.
    • These responses have limited value as a diagnostic aid for equine parasitism due to interpretation challenges.
    • Further research may be needed to refine diagnostic markers for parasitic infections in equids.