Table 2. Distribution of L. monocytogenes-positive samples according to serotypes detected in at least one isolate in four slaughterhouses in Québec.
| Serotypes | Slaughterhouses | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| A(58 samples) | B (55 samples) | C (97 samples) | D (32 samples) | All (242 samples) | ||||||
| n | % | n | % | n | % | n | % | n | % | |
| 1/2a | 29 | 50.0 | 37 | 67.3 | 11 | 11.3 | 14 | 43.8 | 91 | 37.6 |
| 1/2b | 4 | 6.9 | 8 | 14.6 | 56 | 57.7 | 12 | 37.5 | 80 | 33.1 |
| 1/2c | 19 | 32.8 | 8 | 14.6 | 22 | 22.7 | 2 | 6.3 | 51 | 21.1 |
| 3a | - | - | - | - | - | - | 5 | 15.6 | 5 | 2.1 |
| 3b | - | - | - | - | 7 | 7.2 | - | - | 7 | 2.9 |
| 3c | - | - | - | - | 1 | 1.0 | 1 | 3.1 | 2 | 0.8 |
| 4a | 10 | 17.2 | - | - | - | - | - | - | 10 | 4.1 |
| 4b | - | - | 3 | 5.5 | 4 | 4.1 | - | - | 7 | 2.9 |
n: number of L. monocytogenes-positive samples with the serotype detected in at least one isolate.
%: relative to the number of L. monocytogenes-positive samples in each slaughterhouse A, B, C or D, or in all slaughterhouses.