Effect of temperature on the development of the free-living stages of horse cyathostomins.
Abstract: Cyathostomins are considered as the most prevalent and pathogenic parasites of grazing horses. The development on pastures of the free-living stages of these gastrointestinal worms is particularly influenced by outdoor temperature. Understanding the bionomics of free-living stages is an important prerequisite to implement mathematical models designed to assess the parasitic risk for grazing equids. The aim of this study was to assess the effect of 3 constant temperatures under laboratory conditions (10 ± 1 °C, 23 ± 2 °C, 30 ± 2 °C) and one fluctuating temperature under outdoor conditions (mean: 17 ± 4 °C) on the minimum time taken by cyathostomin eggs to develop into first/second stage larvae (L1/L2) then into infective third stage larvae (L3) in horse faeces. According to the temperatures, the minimum time taken by eggs to develop into L1/L2 was between 1 and 3 days and into L3 between 4 and 22 days. At 10 °C, the development time of eggs into L3 was the longest and at 30 °C the fastest. The results were consistent with historically available data and their compilation should lead to the improvement of parameterised models assessing the parasitic risk period in grazing equids.
Copyright © 2022 Elsevier B.V. All rights reserved.
Publication Date: 2022-01-14 PubMed ID: 35115120DOI: 10.1016/j.vprsr.2022.100687Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The research examines how temperature affects the development of different stages of cyathostomins, or horse parasites, with the aim of improving models for assessing parasite risk in grazing horses.
Introduction
- The study is centered on cyathostomins, which are known to be the most common and harmful parasites found in grazing horses.
- The focus is on free-living stages of these intestinal worms on pastures, with most attention being paid to how the outdoor temperature affects their development.
- Understanding the life cycle of free-living stages is crucial in developing mathematical models that evaluate the risk of parasitic infection in grazing horses.
Objective
- The study aims to determine how three different constant temperature ranges (10 ± 1 °C, 23 ± 2 °C, 30 ± 2 °C) in the laboratory and one fluctuating outdoor temperature (average: 17 ± 4 °C) impacts the minimum time it takes for cyathostomin eggs to develop into first/second stage larvae (L1/L2) and eventual infectious third stage larvae (L3) in horse feces.
Results
- Affected by the temperature, the developmental time from eggs into L1/L2 ranged between 1 and 3 days, and into L3 between 4 and 22 days.
- At a cooler temperature of 10°C, the eggs took longest to develop into L3, while at a higher temperature of 30°C, the developmental process was much quicker.
- The findings from this study align with the existing historical data.
Implications
- The results can contribute to improving parameterized models that calculate the period of parasitic risk in grazing horses.
Cite This Article
APA
Merlin A, Ravinet N, Su00e9vin C, Bernez-Romand M, Petry S, Delerue M, Briot L, Chauvin A, Tapprest J, Hu00e9bert L.
(2022).
Effect of temperature on the development of the free-living stages of horse cyathostomins.
Vet Parasitol Reg Stud Reports, 28, 100687.
https://doi.org/10.1016/j.vprsr.2022.100687 Publication
Researcher Affiliations
- ANSES, Laboratory for Animal Health, Normandy site, Physiopathology and Epidemiology of Equine Diseases Unit, 14430 Goustranville, France. Electronic address: aurelie.merlin@anses.fr.
- INRAE, Oniris, BIOEPAR, 44300 Nantes, France.
- ANSES, Laboratory for Animal Health, Normandy site, Physiopathology and Epidemiology of Equine Diseases Unit, 14430 Goustranville, France.
- ANSES, Laboratory for Animal Health, Normandy site, Physiopathology and Epidemiology of Equine Diseases Unit, 14430 Goustranville, France.
- ANSES, Laboratory for Animal Health, Normandy site, Physiopathology and Epidemiology of Equine Diseases Unit, 14430 Goustranville, France.
- French horse and riding institute (IFCE), 61310 Gouffern-en-Auge, France.
- French horse and riding institute (IFCE), 61310 Gouffern-en-Auge, France.
- INRAE, Oniris, BIOEPAR, 44300 Nantes, France.
- ANSES, Laboratory for Animal Health, Normandy site, Physiopathology and Epidemiology of Equine Diseases Unit, 14430 Goustranville, France.
- ANSES, Laboratory for Animal Health, Normandy site, Physiopathology and Epidemiology of Equine Diseases Unit, 14430 Goustranville, France.
MeSH Terms
- Animals
- Feces / parasitology
- Horses
- Larva
- Temperature