A four year longitudinal sero-epidemiology study of Neospora caninumin adult cattle from 114 cattle herds in south west England: Associations with age, herd and dam-offspring pairs

Table 2 Number and percentage N caninum seropositive cattle and herds by visit types and the herd N caninum seroprevalence for the positive herds (Dataset B – 26,437 samples, 13,942 cattle, 114 herds, only cattle ≥ 2 years old for regular visits in the 4-year study period).

Visit identification	Herds			Cattle			Within herd N. caninum seroprevalence for the positive herds only
	No. tested	No. pos	% pos	No. tested	No. pos	% pos	Median	Range	25^th quartile	75^th quartile
1^st routine visit	114	104	91.2	9963	1027	10.3	10.2	0.8 – 52.7	7.3	14.3
2^nd routine visit	102	91	89.2	8979	941	10.5	9.6	0.4 – 58.8	5.8	16.8
3^rd routine visit	96	87	90.6	8580	784	9.1	8.7	0.7 – 58.5	5.3	15.2
3^rd routine with whole herd visit	4	4	100.0	1135	139	12.2	18.8	5.6 – 27.3	14.2	23.6
Overall	114	107	93.9	15736	2039	12.9

There were 9963, 8979 and 8580 samples respectively from the 114 herds visited once, 102 visited twice and 96 visited three times. An additional 1,135 samples were collected when four whole herd visits replaced the routine third visit (i.e. extra samples taken from young stock < 2 years).

ISSN: 1746-6148