Incidence of Reinfections with Mycoplasma hyopneumoniae and Actinobacillus pleuropneumoniaein Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors

Table 2 Final logistic model of risk factors for re-infection with respiratory diseases into farms (n = 214) in sanitised areas in Switzerland (R² = 0.35).

Risk factors	P	OR	95% Cl
Type of pig production
Breeding farm	-	1	-
Finishing farm	<0.001	4.31	2.13 – 8.71
Mixed breeding-finishing farm with at least 100 finishing pigs	0.009	10.12	1.80 – 56.77
Number of suppliers per unit
Number of suppliers <1 og >2	-	1	-
Only 1 animal supplier	<0.001	0.17	0.08 – 0.36
Risk of air-borne transmission
No re-infected neighbour	-	1	-
One additional re-infected neighbour	0.001	3.47	1.66 – 7.24
Pig transports
No parking site	-	1	-
Parking site for transport vehicles close to the farm	<0.001	9.28	2.67 – 32.23

ISSN: 1751-0147