[Helminth control in the adult horse: the need for a re-orientation].

Hertzberg, H.; Schwarzwald, C.C.; Grimm, F.; Frey, Caroline; Gottstein, Bruno; Gerber, Vinzenz (2014). [Helminth control in the adult horse: the need for a re-orientation]. Schweizer Archiv für Tierheilkunde, 156(2), pp. 61-70. Huber 10.1024/0036-7281/a000552

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The epidemiological situation of strongyle infections in adult horses in Switzerland is characterized by a strong dominance of small strongyles (Cyathostominae) and an overall low level of egg shedding in the faeces. The prevailing attitude towards anthelmintic therapy considers neither husbandry conditions nor pasture hygiene measures. Instead, calendar-based routine medication, comprising usually 3 to 4 annual treatments, is the typical strategy. Such an approach, however, often results in an excessive administration of anthelmintics. With respect to the continuous spread of drug resistant cyathostomins a change of strategy seems inevitable. A consensus has been agreed on between equine parasitologists and clinicians of the Vetsuisse Faculty in Zurich and Berne to focus on the concept of a selective control approach, based on individual faecal egg counts as the central element. It is now recommended that clinically healthy horses (> 4 y) are treated only when their strongyle egg count is equal to or higher than 200 eggs per gram of faeces. A regular analysis of the strongyle population based on larval cultures, the control of drug efficacy, and quarantine measures for incoming horses are mandatory components of the concept. Recent experiences in several pilot farms have indicated that only 4 % of the McMaster analyses resulted in a deworming treatment. For horses that did not receive any nematicidal anthelmintic during the current season, a "safety" treatment is recommended at the end of the grazing period.

Item Type:

Journal Article (Original Article)


05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Parasitology
05 Veterinary Medicine > Research Foci > Veterinary Public Health / Herd Health Management
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Equine Clinic
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)

UniBE Contributor:

Frey, Caroline; Gottstein, Bruno and Gerber, Vinzenz


600 Technology > 630 Agriculture








Andrea Gassmann-Suter

Date Deposited:

24 Nov 2014 10:13

Last Modified:

11 Sep 2017 18:48

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Anthelminthika-Resistenz, Pferd, Strongyliden, anthelmintic resistance, horse, selective treatment, selektive Behandlung, strongyles





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