TABLE 3.
Airborne concentrations of 936 and c2 phages in a cheese factory
| Sampling method | Result for: |
|||||
|---|---|---|---|---|---|---|
| 936 |
c2 |
|||||
| Positive/total assaysa | Median concn (1st quartile/3rd quartile)b | LODc | Positive/ total assaysa | Median concn (1st quartile/3rd quartile)b | LODc | |
| NIOSH sampler (stage 1) | 12/12 (100) | 5,346 (2,494/6,010) | 10 | 10/12 (83) | 162 (124/208) | 50 |
| NIOSH sampler (stage 2) | 11/12 (92) | 280 (159/449) | 10 | 5/12 (42) | 223 (139/465) | 50 |
| Coriolis sampler | 43/52 (83) | 580 (249/2,905) | 62 | 32/52 (62) | 1,848 (792/31,077) | 318 |
| PC filter | 15/18 (83) | 2,399 (1,372/3,483) | 492 | 5/18 (28) | 5,377 (3,562/5,595) | 2,523 |
| PTFE filter | 14/18 (78) | 1,538 (1,271/2,093) | 492 | 5/18 (28) | 3,378 (3,232/3,917) | 2,523 |
| BioSampler | 1/18 (6) | 27,903 | 6,986 | 3/18 (17) | 51,750 (44,905/66,148) | 35,821 |
a
Number of positive qPCR assays out of the total number of assays (percentage of positive samples shown in parentheses).
b
Median concentration of genomes per m3 of air, taking only positive samples into account.
c
LOD, limit of detection of viral genomes per m3 of air by qPCR.