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Table 2 Distribution of Shigella spp. by Months in Beijing from 1994 to 2010

From: Changing trends and serotype distribution of Shigella species in Beijing from 1994 to 2010

Surveillance time No. (%) of isolates
Total Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1994 620 (10.34) 5 (0.81) 3 (0.48) 3 (0.48) 2 (0.32) 12 (1.94) 56 (9.03) 165 (26.61) 178 (28.71) 122 (19.68) 42 (6.77) 23 (3.71) 9 (1.45)
1995 793 (13.22) 10 (1.26) 3 (0.38) 11 (1.39) 16 (2.02) 49 (6.18) 132 (16.65) 239 (30.14) 166 (20.93) 76 (9.58) 46 (5.80) 38 (4.79) 7 (0.88)
1996 1196 (19.94) 25 (2.09) 12 (1.00) 9 (0.75) 5 (0.42) 45 (3.76) 125 (10.45) 376 (31.44) 317 (26.51) 185 (15.47) 61 (5.10) 16 (1.34) 20 (1.67)
1997 481 (8.02) 15 (3.12) 5 (1.04) 11 (2.29) 19 (3.95) 55 (11.43) 76 (15.80) 85 (17.67) 66 (13.72) 68 (14.14) 52 (10.81) 15 (3.12) 14 (2.91)
1998 602 (10.04) 4 (0.66) 5 (0.83) 4 (0.66) 10 (1.66) 39 (6.48) 82 (13.62) 108 (17.94) 136 (22.59) 94 (15.61) 83 (13.79) 24 (3.99) 13 (2.16)
1999 477 (7.95) 3 (0.63) 5 (1.05) 3 (0.63) 7 (1.47) 17 (3.56) 63 (13.21) 109 (22.85) 129 (27.04) 80 (16.77) 29 (6.08) 26 (5.45) 6 (1.26)
2000 437 (7.28) 4 (0.92) 2 (0.46) 2 (0.46) 2 (0.46) 11 (2.52) 44 (10.07) 101 (23.11) 154 (35.24) 85 (19.45) 29 (6.64) 0 (0.00) 3 (0.69)
2001 221 (3.68) 0 (0.00) 1 (0.45) 2 (0.90) 1 (0.45) 1 (0.45) 8 (3.62) 41 (18.55) 139 (62.90) 26 (11.76) 2 (0.90) 0 (0.00) 0 (0.00)
2002 399 (6.65) 8 (2.01) 5 (1.25) 17 (4.26) 20 (5.01) 19 (4.76) 49 (12.28) 82 (20.55) 88 (22.06) 65 (16.29) 26 (6.52) 13 (3.26) 7 (1.75)
2003 94 (1.57) 0 (0.00) 1 (1.06) 2 (2.13) 0 (0.00) 1 (1.06) 5 (5.32) 15 (15.96) 24 (25.53) 29 (30.85) 13 (13.83) 2 (2.13) 2 (2.13)
2004 252 (4.20) 1 (0.40) 0 (0.00) 0 (0.00) 0 (0.00) 5 (1.98) 12 (4.76) 56 (22.22) 102 (40.48) 48 (19.05) 18 (7.14) 5 (1.98) 5 (1.98)
2005 148 (2.47) 4 (2.70) 1 (0.68) 3 (2.03) 0 (0.00) 0 (0.00) 1 (0.68) 24 (16.22) 53 (35.81) 39 (26.35) 15 (10.14) 6 (4.05) 2 (1.35)
2006 117 (1.95) 0 (0.00) 0 (0.00) 2 (1.71) 0 (0.00) 4 (3.42) 2 (1.71) 21 (17.95) 41 (35.04) 28 (23.93) 17 (14.53) 2 (1.71) 0 (0.00)
2007 78 (1.30) 1 (1.28) 2 (2.56) 0 (0.00) 1 (1.28) 1 (1.28) 3 (3.85) 17 (21.79) 38 (48.72) 10 (12.82) 3 (3.85) 0 (0.00) 2 (2.56)
2008 22 (0.37) 1 (4.55) 0 (0.00) 0 (0.00) 1 (4.55) 0 (0.00) 1 (4.55) 1 (4.55) 6 (27.27) 12 (54.55) 0 (0.00) 0 (0.00) 0 (0.00)
2009 36 (0.60) 0 (0.00) 0 (0.00) 2 (5.56) 6 (16.67) 0 (0.00) 1 (2.78) 1 (2.78) 16 (44.44) 7 (19.44) 2 (5.56) 0 (0.00) 1 (2.78)
2010 26 (0.43) 1 (3.85) 1 (3.85) 1 (3.85) 1 (3.85) 1 (3.85) 6 (23.08) 1 (3.85) 7 (26.92) 4 (15.38) 2 (7.69) 0 (0.00) 1 (3.85)
Total 5,999 (100.00) 82 (1.37) 46 (0.77) 72 (1.20) 91 (1.52) 260 (4.33) 666 (11.10) 1442 (24.04) 1660 (27.67) 978 (16.30) 440 (7.33) 170 (2.83) 92 (1.53)