(New Zealand Veterinary Association, 2021) Scott I; Gee E; Rogers C; Pomroy B; Reilly M; Adlington B; Miller F; Smith A; Legg K; Adams B
Shortened cyathostomin egg
reappearance periods (ERP)
serve as a warning of developing
anthelmintic resistance (Scott et
al., 2015). Efficacy is thought to
have declined more rapidly for the
later larval stages (L4) than for the
egg laying adults, so that animals
still show zero or near zero counts
for a period after treatment, but
with L4 now surviving treatment
the ERP has shortened.
