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THE STRUCTURE AND SEASONALITY OF BAYLISASCARIS PROCYONIS POPULATIONS IN RACCOONS (PROCYON LOTOR).

L Kristen Page1, Darcie A P Delzell1, Stanley D Gehrt2,3

  • 11   Wheaton College, 501 College Ave., Wheaton, Illinois 60187, USA.

Journal of Wildlife Diseases
|March 12, 2016
PubMed
Summary

Baylisascaris procyonis, a raccoon roundworm, shows seasonal population changes. Worm burdens peak in fall and decline in spring, indicating a yearly cycle impacting transmission.

Keywords:
Baylisascaris procyonisnematodepopulationprevalenceseasonality

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Area of Science:

  • Veterinary Parasitology
  • Wildlife Ecology
  • Zoonotic Disease Research

Background:

  • Baylisascaris procyonis is a common raccoon roundworm and a significant zoonotic pathogen.
  • Understanding B. procyonis transmission dynamics is crucial for both wildlife conservation and public health.
  • Parasite population dynamics are influenced by host factors, season, and environmental conditions.

Purpose of the Study:

  • To investigate seasonal variations in Baylisascaris procyonis population attributes.
  • To determine the influence of host demographics on parasite population structure.
  • To elucidate the yearly cycle of B. procyonis loss and recruitment.

Main Methods:

  • Analysis of 1,050 raccoon gastrointestinal tracts collected between 1996 and 2012.
  • Quantification of B. procyonis prevalence and worm burdens.
  • Examination of seasonal trends and host demographic impacts on parasite populations.

Main Results:

  • 36% of raccoons were infected with B. procyonis, with an average of 15.8 worms per host.
  • Parasite prevalence peaked in October/November.
  • Worm burdens exhibited a seasonal pattern, decreasing from January to June and increasing from June to December.

Conclusions:

  • B. procyonis populations undergo a distinct yearly cycle of loss and recruitment.
  • Seasonal fluctuations in worm burdens significantly influence parasite transmission dynamics.
  • Host demographics did not appear to affect B. procyonis population attributes in this study.