Table 2.
Lower limit, mode and upper limit of prevalence calculated for each genotype in each type of meat through beta distribution with a 95% CI
| Beta distribution of genotype prevalence | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
|
||||||||||
| Meat type | Origin | Total number of samples for each type of meat n | Number of positive samples for each type of meat | Prevalence 2009–2011 (%) | Genotype | Number of positive samples for each genotype s (prevalence,%) | Lower limit of prevalence (%) | Mode of prevalence (%) | Upper limit of prevalence (%) | Detected in humans (DANMAP 2011) |
| Pork | Danish | 562 | 7 | 1.2 | CTX-M-1 | 4 (0.7) | 0.4 | 0.7 | 1.8 | Yes |
| CTX-M-2 | 2 (0.4) | 0.2 | 0.4 | 1.2 | No | |||||
| Unknown | 1 (0.2) | 0.0 | 0.2 | 0.9 | N/A1 | |||||
| Others | 0 (0.0) | 0.0 | 0.0 | 0.7 | N/A2 | |||||
| Imported | 448 | 11 | 2.4 | CTX-M-1 | 9 (2.0) | 1.1 | 2.0 | 3.8 | Yes | |
| CTX-M-14 | 1 (0.2) | 0.0 | 0.2 | 1.3 | Yes | |||||
| CMY-2 | 1 (0.2) | 0.0 | 0.2 | 1.3 | Yes3 | |||||
| Others | 0 (0.0) | 0.0 | 0.0 | 0.9 | N/A | |||||
| Beef | Danish | 382 | 2 | 0.5 | TEM-52 | 1 (0.3) | 0.0 | 0.3 | 1.3 | No |
| CMY-2 | 1 (0.2) | 0.0 | 0.3 | 1.3 | N/A | |||||
| Others | 0 (0.0) | 0.0 | 0.0 | 1.0 | N/A | |||||
| Imported | 298 | 3 | 1.1 | CTX-M-1 | 3 (1.1) | 0.3 | 1.0 | 3.0 | Yes | |
| Others | 0 (0.0) | 0.0 | 0.0 | 1.4 | N/A | |||||
| Broiler meat | CMY-2 | 70 (16.0) | 12.7 | 16.1 | 19.8 | Yes | ||||
| Danish | 440 | 78 | 17.8 | CTX-M-1 | 8 (1.8) | 0.9 | 1.8 | 3.6 | Yes | |
| Others | 0 (0.0) | 0.0 | 0.0 | 0.9 | N/A | |||||
| CMY-2 | 120 (21.0) | 17.9 | 21.0 | 24.5 | Yes | |||||
| CTX-M-1 | 84 (14.7) | 12.1 | 14.5 | 17.9 | Yes | |||||
| SHV-12 | 31 (5.4) | 3.9 | 5.4 | 7.5 | No | |||||
| Imported | 571 | 255 | 44.7 | TEM-52 | 6 (1.1) | 0.5 | 1.1 | 2.3 | No | |
| Unknown | 6 (1.1) | 0.5 | 1.1 | 2.3 | N/A | |||||
| CTX-M-2 | 5 (0.9) | 0.4 | 0.9 | 1.9 | No | |||||
| TEM-20 | 1 (0.2) | 0.0 | 0.2 | 0.9 | No | |||||
| Up-regulated AmpC | 1 (0.2) | 0.0 | 0.2 | 0.9 | No | |||||
| SHV-2a | 1 (0.2) | 0.0 | 0.2 | 0.9 | No | |||||
| Others | 0 (0.0) | 0.0 | 0.0 | 0.7 | N/A | |||||
N/A is applied to ‘Unknown’ genotypes found in meat in DANMAP. It was not possible to determine which was the genotype detected.
N/A is applied to ‘Others’, since it may include genotypes that were present or not in human samples.
CMY-2 was detected in humans but its prevalence was not possible to calculate. However, it is known that few positive CMY-2 samples were detected. The total number of samples for each type of meat performed from 2009 to 2011 for DANMAP is represented by n, while s is the number of positive samples for each genotype in each type of meat. For a better understanding and comparison with the uncertainty analysis the genotype prevalence within each type of meat is shown.