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The Veterinary Clinics of North America. Equine Practice
|August 1, 1986
Summary
Cyathostomes are equine parasites whose control is hindered by anthelmintic resistance. Understanding their lifecycle and environmental factors is crucial for effective management and prevention of equine health issues.
Area of Science:
- Veterinary Parasitology
- Equine Health
- Nematology
Background:
- Cyathostomes are a significant concern in equine health due to increasing anthelmintic resistance.
- Their taxonomy has been simplified, and pathogenicity is better understood, highlighting control challenges.
Purpose of the Study:
- To review the lifecycle, pathogenicity, and control of cyathostomes in horses.
- To address the challenges posed by anthelmintic resistance and larval stages.
Main Methods:
- Review of existing literature on cyathostome biology and epidemiology.
- Analysis of factors influencing larval development, survival, and host-parasite interactions.
Main Results:
- Cyathostome larvae (L3) development is temperature-dependent, with feces as a reservoir.
- Larvae can survive overwinter and persist in host tissues for years.
- Seasonal variations in parasite populations and clinical signs like weight loss and colic are observed.
Conclusions:
- Anthelmintic resistance and the presence of encysted larvae complicate treatment.
- Prevention of environmental ova contamination is key to cyathostome control.
- Host resistance may influence disease severity rather than infection levels.