TABLE 3.
Biovolumes of L. monocytogenes on conveyor belt couponsa
| Biofilm type | Day | Vol (μm3 [± SE]) |
|||
|---|---|---|---|---|---|
| Before C&D |
After C&D |
||||
| H2O | QAC | QAC | PAA | ||
| Front of coupon | |||||
| Multigenus | 4 | 149 (32) | NAb | 39 (23) | 0.06 (0.03) |
| 7 | 35 (22) | 1.3 (1.2) | 0.67 (0.61) | NTc | |
| L. monocytogenes | 4 | 3.4 (1.1) | NA | 0.18 (0.11) | 0.1 (0.08) |
| 7 | 14 (11) | NT | NT | NT | |
| Back of coupon | |||||
| Multigenus | 4 | 331 (141) | NA | 11 (5) | 0 (0) |
| 7 | 62 (14) | 68 (66) | 0.1 (0.06) | NT | |
| L. monocytogenes | 4 | 172 (73) | NA | 0.61 (0.61) | NT |
| 7 | 2,841 (1,439) | 11 (3.6) | 6.3 (3.9) | NT | |
a
Values were obtained from CLSM Z-scans using the ICY image analysis software (64). The numbers of coupons tested for each condition are given in Table S4 in the supplemental material.
b
NA, not applicable.
c
NT, not tested.