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Sweating sickness in adult cattle

T T Dolan, R M Newson

    Tropical Animal Health and Production
    |May 1, 1980
    PubMed
    Summary

    A Kenyan Hyalomma truncatum strain caused sweating sickness in cattle, leading to severe illness and low white blood cell counts. Cattle eventually recovered and showed immunity to the toxicosis a year later.

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    Area of Science:

    • Veterinary Pathology
    • Tick-borne Diseases
    • Animal Health

    Background:

    • Sweating sickness is a significant disease affecting cattle.
    • Hyalomma truncatum ticks are known vectors of various pathogens.
    • Understanding tick-borne diseases is crucial for livestock health.

    Purpose of the Study:

    • To investigate the pathogenicity of a Kenyan Hyalomma truncatum strain in cattle.
    • To characterize the clinical signs and hematological changes associated with sweating sickness.
    • To assess the immune response and recovery pattern in affected cattle.

    Main Methods:

    • Laboratory inoculation of adult cattle with a Kenyan Hyalomma truncatum strain.
    • Clinical observation for typical sweating sickness lesions and mucous membrane changes.
    • Hematological analysis to monitor circulating leucocyte counts, specifically neutropenia.

    Main Results:

    • The Kenyan Hyalomma truncatum strain successfully induced sweating sickness in adult cattle.
    • Clinical signs included moist eczema and mucous membrane alterations, alongside severe leucopenia and neutropenia.
    • All inoculated cattle recovered, though some experienced severe disease and slow convalescence.

    Conclusions:

    • A Kenyan strain of Hyalomma truncatum is confirmed as a causative agent of sweating sickness in cattle.
    • The disease is characterized by significant hematological disturbances, particularly neutropenia.
    • Recovered cattle develop immunity to the toxicosis, indicating potential for future resistance.

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