Table 3

Results from protocol 2- residual sanitizer efficacy
Countertop Organism CFU recovered from control samples* Lot CFU recovered from test samples % reduction**
Test 1- Initial S. aureus 1.3 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
3 <1.5;<1.5;<1.5;<1.5 >99.9
E. aerogenes 1.1 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
3 390;<1.5;<1.5;<1.5 >99.9
MRSA 7.5 × 105 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
P. aeruginosa 1.3 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;90 >99.9
E. coli 0157:H7 1.1 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
Test 1- Final S. aureus 1.1 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
3 <1.5;<1.5;<1.5;<1.5 >99.9
E. aerogenes 1.2 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
3 <1.5;<1.5;<1.5;<1.5 >99.9
MRSA 6.9 × 105 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
P. aeruginosa 2.0x106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
E. coli 0157:H7 9.4 × 105 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
Test 2- Initial S. aureus 1.3 × 106 1 4.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;200 >99.9
3 <1.5;<1.5;<1.5;240 >99.9
E. aerogenes 1.1 × 106 1 <1.5;60;180;<1.5 >99.9
2 9;150;420;<1.5 >99.9
3 <1.5;<1.5;<1.5;<1.5 >99.9
MRSA 7.6 × 105 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
P. aeruginosa 1.3 × 106 1 150;<1.5;9;230 >99.9
2 450;570;<1.5;<1.5 >99.9
E. coli 0157:H7 1.1 × 106 1 <1.5;60;180;<1.5 >99.9
2 90;150;420;<1.5 >99.9
Test 2- Final S. aureus 1.1 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;330;<1.5;<1.5 >99.9
3 <1.5;<1.5;<1.5;<1.5 >99.9
E. aerogenes 1.2 × 106 1 380;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;320 >99.9
3 <1.5;<1.5;<1.5;<1.5 >99.9
MRSA 6.9 × 105 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
P. aeruginosa 2.0 × 106 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9
E. coli 0157:H7 9.4 × 105 1 <1.5;<1.5;<1.5;<1.5 >99.9
2 <1.5;<1.5;<1.5;<1.5 >99.9

*Values taken from Table 1.

**Compared to control, each number represents an average of 4 replicates per manufacturing lot. Either 2 or 3 lots were examined per organism.

Monk et al.

Monk et al. BMC Microbiology 2014 14:57   doi:10.1186/1471-2180-14-57

Open Data