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  3. Anthelmintic Control Failure And Associated Risk Factors Reported By Farmers In Communal Sheep Farming, Oliver Tambo District, Eastern Cape, South Africa
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  3. Anthelmintic Control Failure And Associated Risk Factors Reported By Farmers In Communal Sheep Farming, Oliver Tambo District, Eastern Cape, South Africa

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Anthelmintic control failure and associated risk factors reported by farmers in communal sheep farming, Oliver Tambo

Songezo Mavundela1, William Diymba Dzemo1, Oriel Thekisoe2

  • 1Department of Biological and Environmental Sciences Walter Sisulu University Mthatha South Africa.

Veterinary Record Open
|November 17, 2025

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
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Farmer-reported anthelmintic control failure is common on South African communal sheep farms. Factors like sheep breed, syringe size, and lack of weight estimation are linked to treatment failure, necessitating improved helminth management strategies.

Area of Science:

  • Veterinary Parasitology
  • Livestock Management
  • Agricultural Science

Background:

  • Communal sheep farms in South Africa primarily use anthelmintics without veterinary guidance.
  • This study addresses farmer-reported anthelmintic control failure in the Eastern Cape.

Purpose of the Study:

  • To investigate risk factors associated with anthelmintic control failure on communal sheep farms.
  • To identify specific practices contributing to treatment ineffectiveness.

Main Methods:

  • A semi-structured questionnaire was administered to 107 farmers between January and August 2024.
  • Data collected included farm characteristics, helminth control practices, and treatment outcomes.
  • Sheep faecal samples were analyzed for helminth genera.

Main Results:

  • 62% of farmers reported anthelmintic control failure.
  • Commonly identified helminths included *Haemonchus* spp., *Strongyloides* spp., *Moniezia* spp., and *Trichuris* spp.
  • Dorper-Merino crossbreeds, use of 5/10-mL syringes, and lack of weight estimation were significantly associated with treatment failure.

Conclusions:

  • Findings highlight the need for enhanced helminth management strategies.
  • Improved practices are crucial to increase anthelmintic treatment effectiveness in communal farming systems.