COMPARISON OF FLOCKED SWABS VERSUS MATTRESS SWABS AND NASAL
ASPIRATES FOR THE COLLECTION OF NASOPHARYNGEAL SAMPLES.
James Class, Jimmy Page, PhD, Nathan Chapman, and David Scholl, PhD. Diagnostic HYBRIDS, Inc., Athens, OH 45701, USA.
An image of a flocked swab from Copan, as well as an
explanation of the increased collection efficiency of the
flocked swab as compared to a mattress swab.
1. EasyCount gave rapid, accurate counts compared to a hemacytometer
Flocked swabs represent a significant improvement in collection of NP samples as compared to
traditional mattress swabs
3. An 8-14-fold increase in the number of cells collected was obtained using the flocked swabs
4. Compared to nasal aspirates, the cell counts obtained with flocked swabs were very similar
Flocked NP swabs contained a lower amount of mucous as compared to the NP aspirates
We believe that adoption of flocked swab technology in place of mattress swabs will result in a
much higher quality sample in most cases and reduce the amount of samples with insufficient
cells for analysis by direct specimen.
The distribution of cell counts from all samples collected. The percent of all samples for each
collection method is plotted vs. the actual counts. Greater than 80% of the mattress swab
collected samples contain less than 100,000 cells/mL. The flocked swab count distribution is
very similar to that of the nasal aspirates.
To compare the sample quality of nasopharyngeal
samples collected by flocked swabs, mattress swabs and
Historically, nasopharyngeal (NP) samples have been
collected for diagnosis of respiratory viral infections by
either nasal aspirates (primarily pediatric patients) or by a
NP swab that has the collection material wrapped around
a flexible shaft (mattress swabs). Recently a new type of
swab has been introduced in which the collection material
resembles the bristles of a brush, the flocked swab. This
report quantifies the differen