Article
Widespread benzimidazole resistance and β-tub-1 F200Y SNP in gastrointestinal nematodes of sheep across Portugal.
Veterinary parasitology - 1 Jul 2026
Campbell Natália Faria, Almeida Paulo, Simões Ana Rita, Antunes Joel, Quintas Hélder, Pires Humberto, Monteiro Helena, Waap Helga, Cortes Helder
Abstract excerpt
Anthelmintic resistance (AR) to benzimidazoles (BZs) in gastrointestinal nematodes (GINs) of sheep was assessed across 35 farms in northern (Trás-os-Montes, TM), north-central (Beira Interior, BI), central (Estremadura, ES), and southern (Alentejo, AL) Portugal. Pooled fecal samples were tested for AR by egg hatch tests (EHTs) with albendazole (ABZ) and thiabendazole (TBZ). Effective concentrations inhibiting 50%...
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