Table 2. Concentrations of airborne microorganisms and dust in livestock production systems.

	Bacteria[a]	Fungi[a]	Inhalable Dust[b]	Respirable Dust[b]	PM10[c]	PM2.5[c]
Animal	log CFU m−3	log CFU m−3	mg m−3	mg m−3	mg m−3	mg m−3
Broiler	6.4	4–5	3.8–10.4	0.42–1.14	0.9–2.4	0.04–0.09
Layer	4–5	3–4	1.0–8.8	0.03–1.26	5.9–6.1	0.25–0.29
Pig	5.1	3.7	0.6–5.1	0.09–0.46	0.2–2.0	0.01–0.07
Cattle	4.3	3.8	0.1–1.2	0.03–0.17	0.1	0.01

^[a]Data from Seedorf et al. (1998). ^[b]Data from Taikai et al.(1998). ^[c]Data from Lai et al. (2010).