Table 5. Comparison of prevalence (%) of virulence factors on chickens supplied by Qatari and Saudi Arabian producers.
| Factor | Source | PCR for Cj | Qatar % (CL95) | Saudi Arabia %(CL95) | χ2* | P* |
|---|---|---|---|---|---|---|
| htrB | Karmali | +ve | 92.6 (85.24–96.57) | 96.8 (90.39–99.19) | 1.078 | 0.299 |
| htrB | Karmali | -ve | 80.0 (34.26–98.97) | 75.0 (54.24–88.50) | 0.058 | 0.809 |
| htrB | Karmali | combined | 91.5 (83.51–96.04) | 90.8 (80.48–96.16) | 0.023 | 0.880 |
| cdtB | Karmali | +ve | 98.1 (92.74–99.70) | 92.1 (83.85–96.52) | 2.443 | 0.118 |
| cdtB | Karmali | -ve | 80.0 (34.26–98.97) | 70.8 (50.00–86.08) | 0.184 | 0.668 |
| cdtB | Karmali | combined | 96.6 (90.37–99.05) | 86.2 (74.66–93.01) | 4.984 | 0.026 |
| clpP | Karmali | +ve | 100 (95.95–100) | 98.4 (92.61–99.80) | 1.245 | 0.264 |
| clpP | Karmali | -ve | 100 (50.00–100) | 79.2 (58.49–91.41) | 2.099 | 0.147 |
| clpP | Karmali | combined | 100 (95.58–100) | 93.1 (83.38–97.55) | 6.386 | 0.012 |
| cadF | Karmali | +ve | 96.3 (90.28–98.83) | 96.8 (90.39–99.19) | 0.025 | 0.875 |
| cadF | Karmali | -ve | 60.0 (18.93–92.35) | 79.2 (58.49–91.41) | 0.761 | 0.383 |
| cadF | Karmali | combined | 93.2 (85.75–97.01) | 92.0 (82.04–96.93) | 0.082 | 0.775 |
| htrB | BPW | +ve | 8.0 (1.45–25.59) | 10.9 (3.55–26.31) | 0.155 | 0.694 |
| cdtB | BPW | +ve | 4.0 (0.21–19.56) | 6.5 (1.31–20.39) | 0.204 | 0.651 |
| clpP | BPW | +ve | 36.0 (19.57–56.08) | 26.1 (13.32–43.48) | 0.753 | 0.386 |
| cadF | BPW | +ve | 20.0 (8.23–39.84) | 28.3 (15.11–45.68) | 0.599 | 0.439 |
| ciaB | BPW | +ve | 8.0 (1.45–25.59) | 6.5 (1.31–20.39) | 0.053 | 0.818 |
For Karmali isolates for +ve, -ve and combined isolates from Qatar the sample sizes were 54, 5 and 59, and for Saudi Arabia 63, 24 and 87, respectively.
For DNA isolated from BPW enrichment media, all positive for C. jejuni, the sample sizes were 25 from Qatar and 46 from Saudi Arabia
* Significant outcomes are emphasized in bold. All tests have one degree of freedom.