Table 1.

Dairy cows excreting D. viviparus larvae (positive farms are marked in bold), BTM ELISA results (available for autumn only) and occurrence of coughing (our own and farmers’ observations; data available for autumn only)

Herd		Cows excreting lungworm larvae/total cows (%)		BTM ELISA ODR value	Occurrence of coughing and larvae excretion in autumn 2015
No.	Size	Summer 2015	Autumn 2015		Farmer observation	Our observation
					Occurrence of coughing	Occurrence of coughing	No. of coughing cows/total cows (%)	No. of coughing cows positive for larvae excretion
1	82	0/59 (0)	0/74 (0)	0.125	–	+	1/74 (1.4)	0
2	65	0/55 (0)	0/54 (0)	0.120	–	+	2/54 (3.7)	0
3	215	7/164 (4.3)	23/195 (11.8)	0.342	+	+	25/195 (12.8)	3
4	90	0/70 (0)	0/80 (0)	0.230	–	+	7/80 (8.8)	0
5	105	0/74 (0)	0/58 (0)	0.118	–	+	1/58 (1.7)	0
6	70	1/68 (1.5)	8/53 (15.1)	0.236	–	+	1/53 (1.9)	0
7	80	0/54 (0)	0/54 (0)	0.139	–	–	0/54 (0)	0
8	57	0/54 (0)	0/54 (0)	0.165	–	–	0/54 (0)	0
9	70	nd	4/50 (8.0)	0.196	+	+	4/50 (8.0)	0
10	16	0/15 (0)	0/15 (0)	0.113	–	–	0/15 (0)	0
11	79	1/75 (1.3)	0/72 (0)	0.127	–	+	5/72 (6.9)	0
12	71	0/60 (0)	0/67 (0)	0.132	–	+	6/67 (9.0)	0
13	32	0/26 (0)	0/31 (0)	0.146	–	–	0/31 (0)	0
14	31	0/30 (0)	0/27 (0)	0.216	+	–	0/27 (0)	0
15	48	0/44 (0)	0/44 (0)	0.148	–	+	2/44 (4.6)	0
16	77	0/76 (0)	0/68 (0)	0.148	–	+	6/68 (8.8)	0
17	40	0/36 (0)	0/32 (0)	0.152	+	+	1/32 (3.1)	0
Total	72.2a	9/960 (0.9)	35/1028 (3.4)	0.168a	4 CS+ / 13 CS-	12 CS+ / 5 CS-	61/1028 (5.9)	3/61 (4.9)

Abbreviations: CS+ coughing positive, CS- coughing negative, nd not determined

^aMean, ^bbased on our observation; Farms with a positive coproscopy were marked in bold