Regional Eradication of Mycoplasma hyopneumoniaeFrom Pig Herds and Documentation of Freedom of the Disease

Table 1 Pig herds of cooperative slaughterhouse Lihakunta with antibodies to Mycoplasma hyopneumoniae and which were later shown to be infected with the agent. The time of eradication of the agent is shown, too

Herd	No. of sows	Production type	No. of colostral whey or serum samples		Time of eradication (month/year)	The follow-up serum samples after eradication		Notes
			positive^b	total		positive^b	total
Kar	24	B	5	18	-	-	-	finished all production turned to finishing herd resigned membership
Lin	15	A	18	28^a	-	-	-
Mäk	14	A	3	15^a	-	-	-
Tuo	28	B	11	24	9/98	0	20
Pie	48	A	4	30	12/98	0	20
Hei	50	A	9	28^a	4/99	0	25
Rah	46	A	25	30	4/99	0	30
Mie	30	A	5	15	5/99	0	15
Mar	25	A	8	10	5/99	0	20
Kär	19	A	4	15	5/99	0	20
OjH	30	A	11	20	6/99	0	10
OjR	30	A	8	16	6/99	n.a.	n.a.	n.a. = not analysed
Eur	170	A	7	12^a	7/99	0	20
Ant	35	A	13	18	8/99	0	11
Kej	20	A	18	20	9/99	0	20
Par	25	A	9	11^a	9/99	0	11
Vou	38	A	8	21	9/99	0	15
Meh	26	A	13	19	12/99	0	10
Oll	10	A	6	15	12/99	n.a.	n.a.
Pak	12	A	6	10^a	12/99	0	16
Ras	60	A	5	23^a	12/99	0	11
Ten	25	A	14	29^a	12/99	0	10
Tas	20	A^c	8	15^a	9/00	n.a.	n.a.
Aht	-	C^c	8	10^a	6/00	-	-
Tur	-	C^c	7	7^a	7/00	-	-
Vit	-	C^c	1	7^a	7/00	-	-
Kol	-	C^c	9	15^a	11/00	-	-

All sow herds were screened for M. hyopneumoniae antibodies during 1998 and 1999. In addition, a survey of all pig herds was done in March 2000 based on randomly collected blood samples (n = 509) from slaughtered finishing pigs. Simultaneously, all type C herds were screened.
A = farrowing-to-finishing herd; B = farrowing herd; C = finishing herd practising continuous flow system ^a Serum samples ^b Corresponding to antibodies to M. hyopneumoniae by ELISA. ^c Indication of infection was found only during the survey or the screening of type C herds.

ISSN: 1751-0147