Table 2.

Efficacy data for Teladorsagia circumcincta against each active tested (A – Albendazole, B – Levamisole and C – Ivermectin) with 95% confidence intervals (CI) for the 7 farms over the 4 years of the project and the one follow up year. The faecal egg counts allocated to T. circumcincta based on the proportion of this species found in the control cultures and used as a covariant in the analysis are also given.

		Year of test
		2010	2011	2012	2013	2014
(A) Albendazole
Farm B	% efficacy	51	86	92	NT	71
	95% CI	12–73	79–91	89–93		9–92
	FEC	175	1101	875		73
Farm D	% efficacy	96	98	100	100	100
	95% CI	95–97	97–99	97–100	96–100	98–100
	FEC	625	153	118	30	86
Farm H	% efficacy	96	100	98	95	98
	95% CI	93–98	97–100	94–99	93–96	96–99
	FEC	21	114	25	35	72
Farm K	% efficacy	40	NT	100	67	96
	95% CI	−30–72		95–100	55–77	94–98
	FEC	84		44	242	265
Farm M	% efficacy	−9	70	92	97	83
	95% CI	−55–24	53–81	69–98	94–99	59–92
	FEC	53	596	160	1007	75
Farm P	% efficacy	87	53	73	53	NT
	95% CI	78–92	24–71	61–80	25–69
	FEC	88	48	30	23
Farm W	% efficacy	92	NT	97	56	91
	95% CI	91–93		85–99	31–73	68–97
	FEC	285		32	102	104
(B) Levamisole
Farm B	% efficacy	27	92	98	NT	56
	95% CI	−1–48	85–95	97–99		17–79
	FEC	175	1101	875		73
Farm D	% efficacy	75	99	96	98	98
	95% CI	50–87	98–100	93–98	97–100	90–100
	FEC	625	153	118	30	86
Farm H	% efficacy	91	98	100	98	94
	95% CI	64–98	85–100	93–100	75–100	78–98
	FEC	21	114	25	35	72
Farm K	% efficacy	88	NT	100	95	94
	95% CI	80–93		96–100	84–99	84–98
	FEC	84		44	242	265
Farm M	% efficacy	70	99	98	100	77
	95% CI	8–90	93–100	76–100	99–100	50–88
	FEC	53	596	160	1007	75
Farm P	% efficacy	36	94	96	89	NT
	95% CI	−19–66	47–99	90–98	66–96
	FEC	88	48	30	23
Farm W	% efficacy	78	NT	99	86	92
	95% CI	65–86		98–100	59–95	78–97
	FEC	285		32	102	104
(C) Ivermectin
Farm D	% efficacy	93	98	100	100	100
	95% CI	79–97	95–99	98–100	96–100	97–100
	FEC	625	153	118	30	86
Farm H	% efficacy	90	100	33	97	95
	95% CI	52–98	98–100	−131–75	91–99	76–99
	FEC	21	114	25	35	72
Farm K	% efficacy	10	NT	79	54	95
	95% CI	−155–68		28–94	15–76	84–98
	FEC	84		44	242	265
Farm M	% efficacy	−128	64	66	97	71
	95% CI	−237–−55	45–77	50–77	93–98	53–80
	FEC	53	596	160	1007	75
Farm P	% efficacy	82	72	100	90	NT
	95% CI	42–95	−95–96	96–100	74–96
	FEC	88	48	30	23
Farm W	% efficacy	58	NT	99	97	67
	95% CI	29–75		93–100	73–100	12–88
	FEC	285		32	102	104

NT, not tested.