Sustainable use of Anthelmintics in Swedish Beef and Dairy Production: Ensuring Effective Parasite Control While Combating Resistance

Background

Grazing cattle are susceptible to various internal parasites, which can impact animal health, welfare, and production yield. Current management practices at high livestock densities and the use of permanent pastures, have increased cattle exposure to parasites. While anthelmintics (dewormers) are crucial for parasite control, there are growing concerns about resistance development, as seen in other European countries and in the rest of the world.

Project Overview

Our research project addresses three key areas:

1. Comparison of Anthelmintic Application Methods: We are comparing the long-term effectiveness of different anthelmintic substances and application methods. This research aims to determine what is the most sustainable and efficient parasite control over time. By collecting fecal samples before treatment and post-treatment, we'll assess the effects of the antheelmintic substances. This data will help farmers and veterinarians make informed decisions about the most appropriate treatment approach for their herds.

2. Investigation of Anthelmintic Resistance: We are investigating the current status of anthelmintic resistance in Sweden, focusing on the most important cattle parasites. This includes roundworms such as Ostertagia ostertagi, Trichostrongylus spp., and Cooperia oncophora, as well as lungworms (Dictyocaulus viviparus). We are using a combination of traditional diagnostic methods (egg counts and larval cultures) and advanced molecular Next-Generation Sequencing techniques, to identify which parasite species, if any, are showing signs of resistance to commonly used anthelmintics. This information is crucial for developing effective parasite control strategies and preserving the efficacy of available treatments.

3. Farmer Attitudes and Management Practices: We're exploring farmers' attitudes towards anthelmintic use, their current treatment routines, and pasture management strategies for parasite control. We will make an online questionnaire study where we will gather information about farm characteristics, parasite control strategies, and the decision-making processes behind anthelmintic use. This sociological aspect of the project will provide valuable insights into the practical challenges and considerations faced by farmers. By understanding these factors, we can develop more targeted, practical, and effective recommendations for sustainable parasite management that align with farmers' needs and capabilities.

Aim with the project

By combining traditional diagnostic methods with advanced molecular techniques, we aim to provide a comprehensive understanding of the parasite situation in Swedish cattle herds. Our findings will contribute to improved guidance for farmers and veterinarians, helping them implement sustainable parasite control strategies that minimize the risk of anthelmintic resistance while maintaining optimal animal health and productivity.