Table 3 Hair‐covering caps used during laboratory animal work.

Caps used in:	RUA	MUA
Rat rooms (n = 15)	318 (155 to 654)	11 (4 to 29)
Mouse rooms (n = 30)	4 (2 to 9)	363 (169 to 777)
Rat rooms during care‐taking tasks (n = 7)	537 (199 to 1449)	25 (5 to 121)
Rat rooms during biotechnical tasks (n = 8)	201 (76 to 533)	5 (2 to 15)
Mouse rooms during care‐taking tasks (n = 19)	4 (2 to 12)	1051* (467 to 2365)
Mouse rooms during biotechnical tasks (n = 11)	5 (1 to 15)	58 (30 to 110)

MUA, mouse urinary allergen; RUA, rat urinary allergen.

All values are expressed in nanograms of animal urinary protien equivalent per hour and represent geometric means and 95% CIs.

*Significantly different from MUA measured during biotechnical tasks (p<0.001).