Etiology of acute respiratory disease in fattening pigs in Finland

Table 1 Summary of diagnostic results of 20 case herds exhibiting a respiratory outbreak and of eight control herds with no respiratory symptoms in finishing pigs

Herd	Herd status	Herd classification^a	Bacteriology	APP (serology)^b	SIV (serology)^b	SIV (detection)^c	PCV2 (PCR)^d
1	case	CL-APP	APP, Actinomyces sp.	Yes	Yes	No	3 (20%)
2	case	CL-ASC	No specific bacteria	No	No	No	0
3	case	CL-ASC	APP	Yes	No	No	0
4	case	CL-APP	APP	Yes	No	No	0
5	case	CL-APP	APP	Yes	No	No	0
6	case	CL-APP	APP	Yes	No	No	0
7	case	CL-MISC	gram-, CAMP-, NAD dependent rod-bacterium; S. aureus	Yes	Yes	No	0
8	case	CL-APP	APP	Yes	No	No	2 (13%)
9	case	CL-APP	APP	Yes	No	No	0
10	case	CL-APP	APP	Yes	No	No	0
11	case	CL-APP	APP	Yes	No	No	13 (67%)
12	case	CL-ASC	No specific bacteria	Yes	No	No	4 (27%)
13	case	CL-APP	APP, Str. dysgalactiae subsp. equisimilis, E.coli	Yes	No	No	0
14	case	CL-MISC	Str. suis, Streptococcus sp.	Yes	No	No	9 (47%)
15	case	CL-APP	APP, P. multocida	Yes	No	No	0
16	case	CL-APP	APP	Yes	Yes	No	0
17	case	CL-APP	APP	Yes	No	No	0
18	case	CL-APP	APP	Yes	No	No	2 (13%)
19	case	CL-APP	APP	Yes	No	No	1 (7%)
20	case	CL-MISC	APP, P. multocida	Yes	No	No	0
21	control	NA	NA	No	No	NA	1 (7%)
22	control	NA	NA	Yes	No	NA	0
23	control	NA	NA	Yes	Yes	NA	0
24	control	NA	NA	No	No	NA	0
25	control	NA	NA	Yes	No	NA	0
26	control	NA	NA	Yes	No	NA	1 (7%)
27	control	NA	NA	Yes	No	NA	0
28	control	NA	NA	Yes	Yes	NA	0

Abbreviations: CL-APP acute APP infection, CL-ASC acute Ascaris suum infection, CL-MISC acute infection of miscellaneous etiology, APP Actinobacillus pleuropneumoniaen, A. suum Ascaris suum, S. aureus Staphylococcus aureus, P. multocida Pasteurella multocida, E.coli Escherichia coli, Actinomyces sp. Actinomyces species, Haemophilus sp. Haemophilus species, Str. dysgalactiae subsp. equisimilis Streptococcus dysgalactiae subspecies equisimilis, Str. suis Streptococcus suis, SIV swine influenza virus, PCV2 porcine circovirus 2, NA not available
^aMain necropsy diagnosis based on pathological and bacteriological results from three necropsied pigs
^bSeroconversion in ≥1 out of 15 pigs sampled
^cSIV detection with PCR from ≥1 nasal sample out of 20 pigs or from ≥1 lung sample of three necropsied pigs
^dNumber and percentage (in parentheses) of PCV2 positive samples per herd in PCR analysis

ISSN: 2055-5660