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Table 2 Tests ineffective against Nematodirus spp.

From: A nationwide survey of anthelmintic treatment failure on sheep farms in Ireland

Anthelmintic group Nematodirus spp. Other trichostrongyles Year Month Location
Pre-treatment FEC Post-treatment FEC Efficacy Pre-treatment FEC Post-treatment FEC Efficacya
BZ 300 250 - 300 550 - 2014 July Border
BZ 450 50 - 250 100 - 2014 June South-West
BZ 200 550 - 1750 550 - 2015 June South-East
BZ 2100 200 - 800 100 - 2015 June West
BZ 300 50 - 600 950 - 2015 June West
LV 300 100 - 700 1000 - 2013 July Border
LV 3800 1200 - 800 100 - 2013 June Mid-East
LV 450 3200 - 0 0 n/a 2013 September Border
LV 3100 500 - 1600 0 + 2013 September South-West
LV 300 50 - 150 0 + 2015 September Midlands
AVM 1400 200 - 1000 0 + 2013 July Mid-East
AVM 1350 1350 - 650 650 - 2015 June Mid-East
MOX 850 250 - 350 0 + 2013 June Mid-East
MOX 500 100 - 250 0 + 2013 June Midlands
  1. a+ = effective (reduction in FEC ≥ 95%); - = Not effective (reduction in FEC < 95%); n/a = invalid test