Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
Volume 8, Number 10—October 2002
Bioterrorism-related Anthrax
Bioterrorism-related Anthrax

Surface Sampling Methods for Bacillus anthracis Spore Contamination

Wayne T. Sanderson*Comments to Author , Misty J. Hein*, Lauralynn Taylor*, Brian D. Curwin*, Gregory M. Kinnes*, Teresa A. Seitz*, Tanja Popovic*, Harvey T. Holmes*, Molly E. Kellum*, Sigrid K. McAllister*, David N. Whaley*, Edward A. Tupin†, Timothy Walker†, Jennifer A. Freed†, Dorothy S. Small‡, Brian Klusaritz‡, and John H. Bridges§
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †Agency for Toxic Substances and Disease Registry, Atlanta, Georgia, USA; ‡The IT Corporation, Washington, D.C., USA; §United States Postal Service, Washington, D.C., USA;

Main Article

Table 1

Sample summary statistics for Bacillus anthracis culture analysis, Brentwood Mail Processing and Distribution Center, December 17–19, 2001

Method No. samples tested B. anthracis detected
(%) Rangeb
(CFU/cm2) Medianb
(CFU/cm2) Levela
Negative Low Medium High
Dry swab 28 4 (14) 0.45–232.5 60.9 24 1 1 2
Wet swab 67 36 (54) 0.78–232.5 15.5 31 4 14 18
HEPAvacuum 64 51 (80) 0.3–81,000 23.1 13 9 14 28
Wipe 67 58 (87) 0.02–232.5c 5.4 9 9 36 13

aLevel of B. anthracis (CFU/cm2): negative = 0, low = 0.1–1.6, medium=1.7–15.5, and high=>15.5.
bPositive samples only.
c232.5 CFU/cm2 is the maximum value considered too numerous to count for a concentration; 300 CFU is the maximum value considered too numerous to count for a culture.

Main Article

Page created: July 19, 2010
Page updated: July 19, 2010
Page reviewed: July 19, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.