Volume 8, Number 10—October 2002
Surface Sampling Methods for Bacillus anthracis Spore Contamination
|HEPA vacuum vs. wet swab||HEPA vacuum vs. wipe||Wet swab vs. wipe|
|Higher levels||34||HEPA vacuum||23||HEPA vacuum||13||Wet swab|
|Higher levels||2||Wet swab||9||Wipe||30||Wipe|
|Spearman’s correlation rs (p value)c||0.73 (<0.0001)||0.81 (<0.0001)||0.52 (<0.0001)|
aLevel of B. anthracis (CFU/cm2): negative = 0, low = 01–1.6, medium=1.7–15.5, and high=>15.5.
bTwo samples from the same location agree if they are concordant and are both in the same grouping.
cp value for null hypothesis of zero correlation.
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