Table 2.
Significant growth (≥104 CFU/ml) of potential pathogens recovered from IC, DC4, and DC-80
| Species of potential pathogens | IC | DC4 | Mean decrease ± SD | DC-80 | Mean Decrease ± SD |
|---|---|---|---|---|---|
| Gram-positive bacteria | |||||
| Staphylococcus aureus | 21 | 20 | 0.190 ± 0.510 | 19 | 0.238 ± 0.590 |
| Enterococcus faecalis | 15 | 15 | 0 | 13 | 0.400 ± 0.910 |
| Streptococcus pneumoniae | 5 | 5 | 0 | 4 | 0.600 ± 0.890 |
| Gram-negative bacteria | |||||
| Pseudomonas aeruginosa | 28 | 28 | -0.071 ± 0.460 | 3 | 3.250 ± 1.290 |
| Escherichia coli | 11 | 9 | 0.182 ± 0.400 | 6 | 2.180 ± 1.080 |
| Haemophilus influenzae | 8 | 8 | 0 | 8 | 1.750 ± 0.710 |
| Enterobacter cloacae | 7 | 7 | 0.143 ± 0.690 | 3 | 2.000 ± 1.000 |
| Klebsiella oxytoca | 3 | 3 | 0 | 0 | - |
| Klebsiella pneumoniae | 3 | 3 | 0 | 0 | 3.000 ± 1.000 |
| Stenotrophomonas maltophilia | 3 | 3 | 0.333 ± 0.580 | 1 | 2.000 ± 1.000 |
| Hafnia alvei | 2 | 2 | -0.500 ± 0.710 | 0 | 1.000 ± 0.000 |
| Morganella morganii | 2 | 2 | 0 | 0 | 2.000 ± 1.000 |
| Acinetobacter baumannii | 2 | 2 | 0 | 1 | 0.500 ± 0.710 |
| Citrobacter koseri | 1 | 1 | - | 0 | - |
| Enterobacter aerogenes | 1 | 1 | - | 0 | - |
| Pantoea spp. | 1 | 0 | - | 0 | - |
| Providencia alcalifaciens | 1 | 1 | - | 0 | - |
| Serratia marcescens | 1 | 1 | - | 0 | - |
| Total | 115 | 111 | 58 | ||
IC, immediate culture; DC4, delayed culture after storage at 4°C; DC-80, delayed culture after storage at -80°C. Mean decrease expressed as log10 of CFU/ml ± SD