ADVANCEMENT OF THE SCIENCE
TABLE 1
Results of t -Tests Comparing High-Touch Surfaces in the Guest Traffic Area
Surface
Aerobic Plate Count
Coliforms
Staphylococcus aureus M SD SEM t
ATP Meter
M SD SEM t
M SD SEM t
M SD SEM t
0.61 0.41 0.13 -1.412 0.30 0.00 0.00 -0.100 0.80 0.59 0.19 2.232 * 113 134 42 1.510
Bedroom doorknob before
Bedroom doorknob after 0.91 0.72 0.23
0.40 0.32 0.10
0.37 0.22 0.07
49 25
8
Closet handle before
1.02 1.17 0.37 -0.046 0.54 0.56 0.18 0.796 1.00 1.21 0.38 1.312 59 30
9 0.251
Closet handle after 55 37 12 Drapery pull handle before 0.51 0.47 0.15 -0.891 0.47 0.54 0.17 0.524 0.51 0.34 0.11 1.964 * 18 16 5 0.338 Drapery pull handle after 0.81 0.83 0.26 0.37 0.22 0.07 0.30 0.00 0.00 16 16 5 Tabletop before 1.23 1.17 0.37 0.639 0.30 0.00 0.00 -1.796 1.27 1.05 0.33 2.206 * 447 693 219 1.151 Tabletop after 0.92 0.81 0.26 0.64 0.60 0.19 0.64 0.55 0.17 216 477 151 Table handle before 0.89 0.82 0.26 -0.284 0.30 0.00 0.00 -1.838 0.93 0.77 0.24 0.889 102 87 27 1.856 * Table handle after 1.01 0.82 0.26 0.65 0.60 0.19 0.61 0.52 0.16 59 36 12 Dresser handle before 1.37 1.00 0.32 0.872 0.30 0.00 0.00 -1.479 1.29 1.09 0.35 1.587 56 36 11 0.966 Dresser handle after 0.95 0.78 0.25 0.63 0.71 0.22 0.76 0.64 0.20 42 39 12 Climate control panel before 0.80 0.90 0.29 -0.668 0.30 0.00 0.00 -1.819 0.81 0.82 0.26 1.964 * 59 34 11 2.209 * Climate control panel after 1.06 0.74 0.23 0.66 0.63 0.20 0.30 0.00 0.00 39 15 5 Iron handle before 1.03 0.82 0.26 -0.172 0.30 0.00 0.00 -1.796 0.90 0.82 0.26 2.328 * 19 21 7 0.664 Iron handle after 1.11 0.84 0.27 0.64 0.60 0.19 0.30 0.00 0.00 15 15 5 Coffee maker before 1.84 1.09 0.34 1.353 0.51 0.34 0.11 -1.034 1.71 1.13 0.36 2.473 * 72 90 28 1.283 Coffee maker after 1.29 0.87 0.28 0.76 0.64 0.20 0.93 0.60 0.19 36 19 6 Door safety latch before 0.74 0.63 0.20 -0.444 0.30 0.00 0.00 -1.000 0.64 0.60 0.19 0.271 184 209 66 1.967 * Door safety latch after 0.90 0.85 0.27 0.48 0.57 0.18 0.57 0.46 0.15 63 41 13 Door peephole before 0.73 0.57 0.18 -0.863 0.40 0.32 0.10 -1.281 0.65 0.60 0.19 0.285 26 14 4 1.363 Door peephole after 1.06 0.77 0.24 0.62 0.68 0.21 0.60 0.50 0.16 20 14 4 Trash can rim before 1.40 1.14 0.36 -0.299 0.47 0.37 0.12 -0.532 1.34 1.06 0.33 0.023 25 16 5 1.049 Trash can rim after 1.54 0.78 0.25 0.61 0.66 0.21 1.33 0.69 0.22 18 13 4 Carpet floor before 2.68 0.63 0.20 2.938 ** 0.30 0.00 0.00 -1.000 2.30 1.03 0.32 0.861 11 12 4 -0.509 Carpet floor after 2.01 1.01 0.32 0.47 0.54 0.17 1.95 1.05 0.33 12 16 5 1.04 0.98 0.31 0.40 0.32 0.10 0.50 0.42 0.13
Bedroom light switch before Bedroom light switch after
1.17 0.99 0.31 0.446 0.30 0.00 0.00 -1.441 0.94 1.01 0.32 0.179 95 55 18 1.853 *
0.96 0.88 0.28
0.57 0.59 0.19
0.85 1.05 0.33
58 55 18
* p < .05, ** p < .01, n = 10, df = 9. Note. ATP = adenosine triphosphate.
counts detected before cleaning ( M = 0.46, SD = 0.44) significantly increased after the room was cleaned ( M = 0.81, SD = 0.14, t (14) = -3.369, p = .002). High-touch surfaces that significantly increased in microbial counts following the bathroom cleaning include the
amenity tray ( M = -0.68, SD = 0.96, p = .026) located next to the bathroom sink that is used to store hand soap, lotion, and shampoo; sink faucet handles ( M = -0.55, SD = 0.63, p = .011); doorknob inside bathroom ( M = -0.58, SD = 0.90, p = .036); and hair dryer ( M = -0.74, SD
= 0.93, p = .016). Although coliform counts on most surfaces increased after cleaning, the shower floor was the only surface that had an average reduced log CFU/cm 2 and was found to be significantly cleaner after cleaning ( M = 0.90, SD = 1.49, p = .044). All other surfaces
12
Volume 87 • Number 7
Powered by FlippingBook