Epidemiological studies on equine cestodes in central Spain: infection pattern and population dynamics

Area of Science:

• Veterinary Parasitology
• Epidemiology
• Equine Health

Background:

• Equine cestodosis is a common parasitic infection in horses.
• Understanding the epidemiology of tapeworm infections is crucial for effective control strategies.
• Anoplocephala perfoliata and Anoplocephala magna are the most prevalent tapeworm species in equids.

Purpose of the Study:

• To investigate the prevalence and seasonal dynamics of equine cestodosis in central Spain.
• To identify risk periods and potential environmental factors influencing tapeworm infections in horses.
• To differentiate epidemiological patterns between Anoplocephala perfoliata and Anoplocephala magna.

Main Methods:

• A total of 372 equine digestive tracts were examined post-slaughter over a three-year period (November 2001 - May 2004).
• Prevalence and tapeworm burden for Anoplocephala perfoliata and Anoplocephala magna were recorded.
• Seasonal variations in infection, tapeworm maturity, and potential environmental correlations were analyzed.

Main Results:

• Anoplocephala perfoliata was found in 24% of equids, with significantly higher prevalence in autumn and winter.
• Anoplocephala magna prevalence was 18%, with a non-significant seasonal peak in autumn.
• Immature A. perfoliata were prevalent from summer to winter, while gravid tapeworms peaked in spring, suggesting a yearly cycle linked to humidity.

Conclusions:

• Equine cestodosis, particularly A. perfoliata, exhibits distinct seasonal patterns in central Spain, influenced by humidity and mite availability.
• A. perfoliata appears to have one generation per year, with rainfall impacting its life cycle.
• While A. magna showed less distinct seasonal patterns, autumn indicated recent infections, suggesting year-round transmission potential.