Table 6. Percent contribution to total exposure risk, by source of contact.

	Contribution to total exposure risk (%)
	2 days of farm infectiousness, 2 days of vehicle infectiousness	15 days of farm infectiousness, 7 days of vehicle infectiousness
Integrator-linked contacts
Feed delivery	73.7	32.7
Flock supervisor	6.83	19.1
Chick delivery	2.3	10.9
Other management personnel	0.0	0.0
Live haul	1.9	9.1
Total	84.7	71.8
Non-integrator commercial services
Meter reading	1.1	5.0
Propane delivery	2.2	10.3
Maintenance	0.0	0.0
Cake out	0.2	0.8
Waste haul	0.2	1.1
Total, non-integrator commercial services	3.7	17.2
Part-time workers	10.9	10.4
Grower social contacts	0.8	0.7
Total, all sources	100.0	100.0