Repeated treatment faecal egg counts to identify gastrointestinal nematode resistance in a context of low-level infection of sheep on farms in eastern Algeria

The efficacy of benzimidazoles and ivermectin was tested in 14 pilot farms in eastern Algeria. Resistance was detected in strongyle nematodes against benzimidazoles (five farms) and ivermectin (one farm). The main genera in the region were resistant: Teladorsagia, Trichostrongylus, Marshallagia and...

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Bibliographic Details
Published in:Veterinary parasitology 2007-03, Vol.144 (1), p.104-110
Main Authors: Bentounsi, B., Attir, B., Meradi, S., Cabaret, J.
Format: Article
Language:English
Subjects:
Algeria
Animal biology
Animals
anthelmintic resistance
anthelmintics
Antinematodal Agents - therapeutic use
Benzimidazole
benzimidazoles
Benzimidazoles - pharmacology
Benzimidazoles - therapeutic use
Drug Resistance
drug therapy
fecal egg count
fecal egg count reduction test
Feces - parasitology
Female
gastrointestinal nematodes
Ivermectin
Life Sciences
Nematoda - drug effects
Nematode
nematode infections
Nematode Infections - drug therapy
Nematode Infections - epidemiology
Nematode Infections - veterinary
Parasite Egg Count - veterinary
Parasitic Sensitivity Tests - veterinary
Resistance
resistance diagnosis
Sheep
Sheep Diseases - drug therapy
Sheep Diseases - epidemiology
Sheep Diseases - parasitology
strongyle resistance
Treatment Outcome
Veterinary medicine and animal Health
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Summary:The efficacy of benzimidazoles and ivermectin was tested in 14 pilot farms in eastern Algeria. Resistance was detected in strongyle nematodes against benzimidazoles (five farms) and ivermectin (one farm). The main genera in the region were resistant: Teladorsagia, Trichostrongylus, Marshallagia and Nematodirus. The evaluations based on FECRT (faecal egg count reduction tests) were not always consistent due to the low-level of infection, and we developed a simplified, repeated treatment strategy to investigate resistance. The results obtained with repeated treatment faecal egg counts match globally those obtained with conventional faecal egg count reduction tests. This simplified, repeated treatment method should be investigated further since it is quicker, and this could make it possible to test larger farm samplings.
ISSN:0304-4017
1873-2550
DOI:10.1016/j.vetpar.2006.09.013