TABLE 1

Distribution of S. suis-positive isolation rates, mean temperatures, and farm types in China and the United Kingdoma

Country and farmFarm type5-wk-old pigs20-wk-old pigs
MT (°C)SizeN (F)PPPIR (%)MT (°C)SizeN (F)PPPIR (%)
China
    C1Intensive29.52310 (9)626.09292526 (21)1144.00
    C2Intensive322733 (30)1762.9619.5251 (1)14.00
    C3Intensive29.52528 (26)1560.0017.5252 (2)28.00
    C4Intensive15.52512 (12)936.004.8252 (2)28.00
    C5Intensive15.52512 (12)1040.004.82512 (12)832.00
    C6Small28.52421 (19)1250.00292520 (19)1352.00
    C7Small292411 (11)833.3328.5256 (6)416.00
    C8Small302713 (13)829.6317.5257 (7)416.00
    C9Small14252 (2)28.0014251 (1)14.00
    C10Small8.5253 (3)212.0014251 (1)14.00
United Kingdom
    U1Intensive142517 (17)1144.00152514 (14)1040.00
    U2Intensive192542 (40)2392.0012.5251 (1)14.00
    U3Intensive16.52523 (23)1768.004259 (9)832.00
    U4Intensive11.5258 (8)728.007.5255 (5)416.00
    U5Intensive7251 (1)14.007257 (7)728.00
  • a MT, mean temperature (the average of the highest and lowest air temperatures of the sampling day); size, sample size (the number of pigs sampled each time); N, the number of S. suis isolates; F, the number of isolates in the filtered subset for direct comparison of China and UK data; PP, positive pigs (the number of S. suis-positive pigs); PIR, positive isolation rate (the proportion of S. suis-positive pigs).