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ID#:9749
Description:Under a low magnification of 37x, this 2007 scanning electron microscopic (SEM) image depicted the fibrous configuration of a dry macrofoam sponge swabs. This swab, as well as three other materials, including polyester (see PHIL 9735), rayon (see PHIL 9734) and cotton (see PHIL 9732, and 9733), were scanned for a CDC study involving their efficiency in recovery of Bacillus anthracis bacterial spores from steel coupons that had been inoculated with a spore suspension of known concentration. See PHIL 9736, 9737, 9738, 9750, 9751, an 9752, for other views of this material. The article discussing the description of this swab material analysis, and the analytical results was published in ”Emerging Infectious Diseases”, Vol. 10, No. 6, June, 2004, and was entitled, Swab Materials and Bacillus anthracis Spore Recovery from Nonporous Surfaces. A link to this article is found below.
Results indicated that premoistened swabs were more efficient at recovering spores than dry swabs, i.e., 14.3% vs. 4.4%. Vortexing swabs for 2 min. during processing resulted in superior extraction of spores when compared to sonicating them for 12 min., or subjecting them to minimal agitation. Premoistened macrofoam and cotton swabs that were vortexed during processing recovered the greatest proportions of spores with a mean recovery of 43.6% (standard deviation [SD] 11.1%), and 41.7% (SD 14.6%), respectively. Premoistened and vortexed polyester and rayon swabs were less efficient, at 9.9% (SD 3.8%) and 11.5% (SD 7.9%), respectively.
High Resolution: Click here for hi-resolution image (5.5 MB)
Content Providers(s):CDC/ Laura Rose
Creation Date:2007
Photo Credit:Janice Haney Carr
Links:CDC - National Center for Infectious Diseases (NCID), Division of Healthcare Quality Promotion (DHQP)
CDC – Nat. Center for Infectios Diseases; ”Emerging Infectious Diseases”, Vol. 10, No. 6, June, 2004, Swab Materials and Bacillus anthracis Spore Recovery from Nonporous Surfaces
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

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