Table 3.

Exposure to inhalable endotoxin (median (average) and [range]) in cucumber and tomato nurseries expressed as ng m⁻³ and concentration (ng mg⁻¹ dust) of endotoxin in the sampled dust

Nursery	Personal samplings
	Summer harvest		Autumn harvest		Clearing of plants
	ng m−3	ng mg−1	ng m−3	ng mg−1	ng m−3	ng mg−1
A	85a (99) [46–171]	33a (33) [4–61]	75a,b (83)* [23–160]	42a (44) [21–72]	118a (149) [15–339]	34a (37) [17–71]
B	27b (24)* [9–43]	14b (14) [7–25]			43a,b (79)x [10–346]	18a,b (29) [16–83]
C	1.3c (1.4) [0.54–2.1]	2.4c (2.8) [1.9–4.9]			13b (20) [7–51]	17b (18) [8–34]
D	2.2c (2.5) [0.7–5.4]	4.9c (5.0) [0.4–8.9]			111a (138) [46–402]	36a,b (37) [5–73]

Median exposure values followed by the same letter are not statistically different. Median endotoxin concentration values followed by the same letter are not statistically different at the 95% level.

^*Part of the day workers also packed cucumbers.

^xMost of the day workers also potted poinsettia.