Table 3

Detection of pig tonsil samples from 11 provinces by both PCR and Y. enterocolitica isolation

ProvinceNo. of samplesPCR positive, %aIsolation rate, %bIsolation rate by strain type
Pathogenic, %cNonpathogenic, %d
Henan1,35831.0225.33 (344/1,358)85.17 (293/344)14.83 (51/344)
Sichuan82721.902.30 (19/827)89.47 (17/19)10.53 (2/19)
Yunnan66726.543.60 (24/667)41.67 (10/24)58.33 (14/24)
Beijing35065.1454.57 (191/350)100 (191/191)0
Inner Mongolia22836.4019.30 (44/228)93.18 (41/44)6.82 (3/44)
Heilongjiang22667.7050.88 (115/226)3.48 (4/115)96.52 (111/115)
Jiangsu20038.0015.00 (30/200)100 (30/30)0
Qinghai20023.5011.00 (22/200)86.36 (19/22)13.64 (3/22)
Ningxia19234.9013.02 (25/192)100 (25/25)0
Tianjin14524.145.52 (8/145)100 (8/8)0
Jiangxi10258.8254.90 (56/102)100 (56/56)0
Total4,49536.3119.53 (878/4,495)79.04 (694/878)20.96 (184/878)
  • a The values are the number positive for either or both foxA and ail/number of samples.

  • b The values in parentheses indicate the number of strains isolated from the samples/number of samples tested.

  • c The values in parentheses indicate the number of pathogenic strains/number of strains isolated from the samples.

  • d The values in parentheses indicate the number of nonpathogenic strains/number of strains isolated from the samples.