FIG. 2.

(A) Box plots showing the median, interquartile, and range values of the percent recovery efficiencies of B. atrophaeus spores from glass surfaces using foam spatulas (I) and wet-surface collectors (II). The median value is indicated by the horizontal line within a box. The 25th and 75th percentiles are indicated by the bottoms and tops of the boxes, respectively. No significant difference between the median percent recovery efficiencies of spores using foam spatulas and wet-surface collectors was determined with the nonparametric Mann-Whitney U test (P > 0.05). (B) Mean numbers of B. atrophaeus spores recovered from glass surfaces with foam spatulas (I) and in the wet-surface collectors (II) in all experiments performed in this study.