Table 1. Overall positivity for MERS-CoV nAbs and RNA in imported and local dromedaries in Saudi Arabia.
| Samples tested n (%) | MN Assay Positive n (%; 95% CI) | RT-PCR Positive n (%; 95% CI) | MN Assay & RT-PCR Positive n (%; 95% CI) | |
|---|---|---|---|---|
| Origin | ||||
| Djibouti | 328 (23.4) | 321 (97.9; 96.3–99.4) | 37 (11.3; 7.9–14.7) | 34 (10.4; 7.1–13.7) |
| Sudan | 829 (59.3) | 764 (92.2; 90.3–94.0) | 117 (14.1; 11.7–16.5) | 99 (11.9; 9.7–14.2) |
| Jeddah | 242 (17.3) | 212 (87.6; 83.5–91.8) | 86 (35.5; 29.5–41.6) | 76 (31.4; 25.6–37.3) |
| p value | <0.0001 | <0.0001 | <0.0001 | |
| Age* | ||||
| < 1 year | 43 (3.1) | 29 (67.4; 53.4–81.5) | 4 (9.3; 0.6–18.0) | 4 (9.3; 0.6–18.0) |
| 1–2 years | 408 (29.2) | 353 (86.5; 83.2–89.8) | 116 (28.4; 24.1–32.8) | 91 (22.3; 18.3–26.3) |
| >2 year | 713 (51.0) | 688 (96.5; 95.1–97.8) | 120 (16.8; 14.1–19.6) | 114 (16.0; 13.3–18.7) |
| p value | <0.0001 | <0.0001 | 0.0096 | |
| Sex* | ||||
| Male | 800 | 728 (91.0; 89.0–93.0) | 194 (24.3; 21.3–27.2) | 165 (20.6; 17.8–23.4) |
| Female | 364 | 342 (94.0; 91.5–96.4) | 46 (12.6; 9.2–16.1) | 44 (12.1; 8.7–15.4) |
| p value | 0.0862 | <0.0001 | <0.0001 | |
| Year | ||||
| 2016 | 382 | 354 (92.7; 90.1–95.3) | 42 (11.0; 7.9–14.1) | 30 (7.9; 5.2–10.6) |
| 2017 | 637 | 595 (93.4; 91.5–95.3) | 73 (11.5; 9.0–13.9) | 68 (10.7; 8.3–13.1) |
| 2018 | 380 | 348 (91.6; 88.8–94.4) | 125 (32.9; 28.2–37.6) | 111 (29.2; 24.6–33.8) |
| p value | 0.5551 | <0.0001 | 0.0004 | |
| Total | 1399 | 1297 (92.7; 91.4–94.1) | 240 (17.2; 15.2–19.1) | 209 (14.9; 13.1–16.8) |
*Sex and age were only available for 1164 samples (83.2%) out of the 1399 tested samples.