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Table 1 Frequencies of alleles containing the F167Y, E198A and F200Y exchanges correlating with benzimidazole resistance for Haemonchus contortus, Teladorsagia circumcincta and Trichostrongylus colubriformis. (< 5% = below background threshold)

From: High frequency of benzimidazole resistance alleles in trichostrongyloids from Austrian sheep flocks in an alpine transhumance management system

FarmN larvae in pooled samples% of trichostrongyloid species in pooled third stage larval samples used for pyrosequencingH. contortus
% F200Y
T. circumcincta
% F200Y
T. circumcincta
% F167Y
T. colubriformis
% F200Y
T. colubriformis
% F167Y
1 (FT)*1566473249; 71an.a.< 5100< 5
2 (FT)**17,600482369666< 599< 5
3 (FT)**14,4004212369331< 5n.d.n.d.
4 (FT)**466626174095n.a.< 57723
6**5000866n.a.< 5< 5n.d.n.d.
8*61,66621242n.a.48< 5n.d.n.d.
9*1666166799n.a.n.a.97<  5
10 (FT)**20003985010011n.a.100< 5
11*2666142149440< 5n.d.n.d.
12 (FT)42,66616853n.a.47< 5987
13 (FT)**266622258100; 94a31< 5959
15 (FT)*n.d.31761n.a.n.a.< 51006
  1. n.d. No data (no DNA left for analysis); n.a. No amplicon generated; FT Full-time farms, all other farms were sideline enterprises (small-holder farms); *: indicates farms that used dewormers once a year; **: indicates farms that used dewormers two times a year; bold letters: farms where a reduced efficacy of moxidectin had been observed; aTwo samples were examined