Does the in vitro egg hatch test predict the failure of benzimidazole treatment in Haemonchus contortus?

Special Issue – Combatting Anthelmintic resistance in ruminants. Invited Editors: Johannes Charlier, Hervé Hoste, and Smaragda Sotiraki

Open Access

Table 1

Percent faecal egg count reduction (%FECR) and percentage of the codon 200 TAC allele of β-tubulin isotype 1 in the groups of goats infected with different proportions of the resistant and susceptible isolates of Haemonchus contortus.

Calculated % of R alleles in infection dose	%FECR	%FECR (min–max)	TAC (%)^*
10	91.2	75.0–97.3	10.5
20	77.9	77.8–100.0	22.8
30	63.1	27.3–87.3	39.5
40	50.5	0–85.8	40.0
60	36.5	0–88.6	53.5
80	41.3	0–69.1	74.0

Larvae obtained from pooled culture from each group before treatment at 35 days post-infection.

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