Worm Egg Counts and Reduction Tests

Question 1

What is faecal egg counting

Answer 1

Methods used for detection and quantification of worm eggs in faecal samples
It is the cornerstone for the detection of GI parasites in all species

Question 2

What is a FEC reduction test

Answer 2

Use to detect anthelmintic resistance
FEC on 2 samples- 1 at time of treatment, 2 at defined times after treatment, depending on anthelmintic group used:
3-7 days after using levamisole
8–10 days after using a benzimidazole
14–17 days after using a Macrocyclic lactones

If unsure or if testing all anthelmintic groups in the same flock, collect the 2nd faecal sample at day 14 post treatment

Question 3

How many horses/sheep/cows on a farm minimum should be FEC as part of FECR test

Answer 3

6 horses
10 sheep
10 cows

Question 4

What is the cut off for treatment efficacy to infer anthelmintic resistance

Answer 4

95%- resistance inferred if reduction in FEC is <95%