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Table 2 The isolation results for the contacts of AFP cases and healthy population

From: An outbreak following importation of wild poliovirus in Xinjiang Uyghur Autonomous Region, China, 2011

Population Characteristics WPV NPEV§ Vaccine strains Negative Total
N (%) N (%) N (%) N (%)
Contacts of AFP cases The type of AFP cases WPV cases 4 (1.4) 0 (0) 4 (1.4) 269 (97.1) 277
Clinical compatible 3 (7.0) 1 (2.3) 0 (0) 39 (90.7) 43
polio cases
Non-polio AFP cases 7 (2.0) 7 (2.0) 15 (4.3) 324 (91.8) 353
Age (Years) <1 1 (4.8) 1 (4.8) 2 (9.5) 17 (80.9) 21
1–4 0 (0) 2 (2.2) 1 (1.1) 87 (96.7) 90
5–14 4 (4.3) 1 (1.1) 6 (6.4) 83 (88.3) 94
15–39 7 (2.1) 3 (0.9) 8 (2.4) 322 (94.7) 340
≥40 2 (1.6) 1 (0.8) 2 (1.6) 123 (96.1) 128
Sex Male 7 (2.4) 5 (1.7) 12 (4.0) 274 (91.9) 298
Female 7 (1.9) 3 (0.8) 7 (1.9) 358 (95.5) 375
Districts Urumqi 0 (0) 0 (0) 1 (1.0) 102 (99.0) 103
Hotan 8 (3.2) 2 (0.8) 9 (3.5) 235 (92.5) 254
Kashgar 6 (3.2) 4 (2.1) 5 (2.7) 172 (92.0) 187
Bayingolin 0 (0) 1 (1.5) 2 (2.9) 65 (95.6) 68
Aksu 0 (0) 1 (1.9) 2 (3.8) 50 (94.3) 53
Other prefectures 0 (0) 0 (0) 0 (0) 8 (100.0) 8
Specimens collection date Before 9 Sep 8 (2.4) 4 (1.2) 4 (1.2) 321 (95.2) 337
9 Sep- 27 Sep 5 (2.2) 4 (1.7) 8 (3.4) 216 (92.7) 233
After 27 Sep 1 (1.0) 0 (0) 7 (6.8) 95 (92.2) 103
Total 14 (2.1) 8 (1.2) 19 (2.8) 632 (93.9) 673
Healthy population Age (Years) <1 0 (0.0) 0 (0.0) 0 (0.0) 12 (100.0) 12
1–4 4 (4.0) 4 (4.0) 4 (4.0) 89 (88.1) 101
5–14 8 (3.5) 5 (2.2) 41 (18.1) 172 (76.1) 226
15–39 1 (1.1) 0 (0.0) 2 (2.2) 90 (96.8) 93
≥40 0 (0.0) 2 (3.4) 1 (1.7) 56 (94.9) 59
Districts Urumqi 0 (0.0) 0 (0.0) 2 (5.9) 32 (94.1) 34
Kashgar 5 (5.6) 1 (1.1) 2 (2.2) 81 (91) 89
Hotan 8 (2.5) 9 (2.8) 43 (13.3) 263 (81.4) 323
Other prefectures 0 (0.0) 1 (2.2) 1 (2.2) 43 (95.6) 45
Total 13 (2.7) 11 (2.2) 48 (9.8) 419 (85.3) 491
  1. §Non-polio enterovirus.
  2. Four non-polio AFP cases and 2 clinical compatible polio cases should be classified as WPV cases based on International Health Regulations (IHR, 2005) which defined that an AFP case with WPV isolation in stool specimens collected from a close contact of the case is classified as an WPV case.