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The Canadian veterinary journal = La revue veterinaire canadienne2018; 59(3); 284-292;

Characteristics of parasitic egg shedding over a 1-year period in foals and their dams in 2 farms in central Saskatchewan.

Abstract: The goals of this study were to report the seasonal shedding patterns of strongyle and spp. eggs in repeated fecal samples for mares ( = 38) and foals ( = 39), and to evaluate the efficacy of ivermectin treatment in mares from 2 selected horse breeding farms in central Saskatchewan. Median strongyle fecal egg counts (FEC) peaked in July and August in adult horses. The farms differed significantly ( = 0.0005) in regard to strongyle shedding categories ( 500 eggs/g) over time, but for each individual horse (both farms combined) these categories did not differ over time ( = 0.13) on samples collected in grazing season. When evaluating 3 samples collected fall, summer and fall in 2 consecutive grazing seasons, 94% of horses that shed < 200 eggs/g on 2 initial samples, remained in the same category on the third sample. Mares on each farm didn't differ statistically in shedding categories when comparing September samples from 2 consecutive years (Farm A: = 0.56, Farm B: = 0.06). Peak strongyle shedding occurred late fall in the first year of life for foals on Farm A, and in July in the second year of life for foals on Farm B. spp. FEC were greatest in foals ≤ 6 months of age, with peak observed when foals were 5 to 6 months old. Ivermectin was 100% effective at reducing strongyle FEC 2 weeks after treatment in adult horses. Horses in Saskatchewan had relatively high strongyle shedding levels, which were significantly different between the farms, and high prevalence of Strongyle shedding consistency was observed for FECs collected from mares in grazing season (July to September). . Cette étude avait pour but de dresser un rapport sur les tendances d’excrétion saisonnière des oeufs des strongyles et de spp. dans des prélèvements fécaux répétés pour les juments ( = 38) et les poulains ( = 39) et d’évaluer l’efficacité du traitement à l’ivermectine chez deux juments provenant de deux fermes d’élevage de chevaux dans le centre de la Saskatchewan. Les comptes médians d’oeufs fécaux des strongyles ont culminé en juillet et en août chez les chevaux adultes. Les fermes présentaient des différences significatives ( = 0,0005) à l’égard des catégories d’excrétion des strongyles ( 500 oeufs/g) dans le temps, mais, pour chaque cheval individuel (les deux fermes combinées), ces catégories ne présentaient pas de différences à la longue ( = 0,13) pour les échantillons prélevés durant la saison de pâturage. Lors de l’évaluation des reois échantillons prélevés à l’automne, à l’été et à l’automne pendant deux saisons de pâturage consécutives, 94 % des chevaux qui avaient excrété < 200 oeufs/g pour deux prélèvements initiaux, sont demeurés dans la même catégorie pour le troisième échantillon. Les juments de chaque ferme ne présentaient pas de différences statistiques pour les catégories d’excrétion lorsque l’on comparait les échantillons de septembre provenant de deux années consécutives (Ferme A : = 0,56, Ferme B : = 0,06). L’excrétion des strongyles a culminé à la fin de l’automne pendant la première année de vie pour les poulains de la Ferme A et en juillet de la deuxième année de vie pour les poulains de la Ferme B. Les comptes d’oeufs fécaux de spp. étaient les plus importants chez les poulains âgés de ≤ 6 mois et le point culminant était observé lorsque les poulains étaient âgés de 5 ou 6 mois. L’ivermectine était efficace à 100 % pour réduire les comptes d’oeufs fécaux 2 semaines après le traitement chez les chevaux adultes. Les chevaux de la Saskatchewan ont présenté des taux d’excrétion relativement élevés de strongyles, qui étaient significativement différents entre les fermes, et une forte prévalence d’ La constance de l’excrétion des strongyles a été observée pour les comptes d’oeufs fécaux obtenus auprès des juments pendant la saison de pâturage (de juillet à septembre).(Traduit par Isabelle Vallières).
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Publication Date: 2018-03-31 PubMed ID: 29599559PubMed Central: PMC5819021
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  • Journal Article
  • Multicenter Study

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research focuses on studying the patterns of parasitic egg shedding in foals and mares over a year at two horse breeding farms in Central Saskatchewan. It also evaluates the effectiveness of ivermectin treatment in controlling the shedding.

Research Objectives and Methodology

  • The study aims to document the seasonal shedding patterns of strongyle and spp. eggs in the feces of mares and foals. The sample consisted of 38 mares and 39 foals from two selected horse breeding farms in central Saskatchewan.
  • The study monitored the fecal egg counts (FEC) of strongyles, which peaked in July and August for adult horses. It evaluated differences in strongyle shedding categories (less than 200; 200 to 500; and more than 500 eggs per gram) over time.
  • The study also aimed to evaluate the efficacy of ivermectin treatment, a commonly used antiparasitic medication in horses, by observing if it reduced FEC two weeks after its administration.

Research Findings

  • The study findings revealed significant differences in strongyle shedding categories between the two farms. However, the shedding categories for each individual horse across both farms did not display significant alterations over time during the grazing season.
  • Out of the horses that shed less than 200 eggs per gram in the first two samples, 94% stayed within the same category in the third sample.
  • Comparisons of September samples from two consecutive years did not show a statistical difference in the shedding categories amongst mares in each farm.
  • The study noted peak strongyle shedding occurred in the late fall during the first year for foals on one farm, and in July during the second year of life for foals on the other farm.
  • Foals aged 6 months or less had the highest FEC of spp., peaking when the foals were 5 to 6 months old.
  • The ivermectin treatment was found to be 100% effective at reducing strongyle FEC in adult horses two weeks after treatment.

Implications of the Study

  • Horses in Saskatchewan demonstrated relatively high strongyle shedding levels which were notably different across the two farms and showed a high prevalence of spp. However, there was a consistent pattern of strongyle shedding for FECs collected from mares during the grazing season (July to September), suggesting a predictable pattern to their shedding.
  • This study plays a fundamental role in understanding the parasitic behavior in foals and adult horses. Such information can aid in developing efficient treatment protocols and preventative parasitic management on farms.

Cite This Article

APA
Misuno E, Clark CR, Anderson SL, Jenkins E, Wagner B, Dembek K, Petrie L. (2018). Characteristics of parasitic egg shedding over a 1-year period in foals and their dams in 2 farms in central Saskatchewan. Can Vet J, 59(3), 284-292.

Publication

The Canadian veterinary journal = La revue veterinaire canadienne
ISSN: 0008-5286
NlmUniqueID: 0004653
Country: Canada
Language: English
Volume: 59
Issue: 3
Pages: 284-292

Researcher Affiliations

Misuno, Elzbieta
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).
Clark, Chris R
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).
Anderson, Stacy L
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).
Jenkins, Emily
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).
Wagner, Brent
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).
Dembek, Katarzyna
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).
Petrie, Lyall
  • Department of Large Animal Clinical Sciences (Misuno, Clark, Petrie), Department of Veterinary Microbiology (Jenkins, Wagner), University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4; Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, Tennessee 37752, USA (Anderson); Iowa State University, College of Veterinary Medicine, 2503 Vet Med, 1600 S 16th Street, Ames, Iowa 50011, USA (Dembek).

MeSH Terms

  • Animal Husbandry
  • Animals
  • Animals, Newborn
  • Anthelmintics / administration & dosage
  • Anthelmintics / therapeutic use
  • Antiparasitic Agents / therapeutic use
  • Ascaridida Infections / drug therapy
  • Ascaridida Infections / veterinary
  • Ascaridoidea / isolation & purification
  • Ascaridoidea / pathogenicity
  • Farms
  • Feces / parasitology
  • Female
  • Horse Diseases / drug therapy
  • Horse Diseases / parasitology
  • Horses
  • Ivermectin / therapeutic use
  • Male
  • Parasite Egg Count / veterinary
  • Saskatchewan
  • Seasons

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Citations

This article has been cited 4 times.
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