Volume 26, Number 6—June 2020
Synopsis
Epidemiologic Changes of Scrub Typhus in China, 1952–2016
Zhongjie Li1, Hualei Xin1, Junling Sun1, Shengjie Lai, Lingjia Zeng, Canjun Zheng, Sarah E. Ray, Nicole Davis Weaver, Liping Wang, Jianxing Yu
, Zijian Feng2, Simon I. Hay, and George F. Gao2
, Zijian Feng2, Simon I. Hay, and George F. Gao2
Table 1
Characteristics of reported scrub typhus cases, China, 2006–2016*
| Characteristic | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. cases | 1,254 | 1,340 | 2,613 | 3,237 | 4,088 | 6,020 | 8,928 | 11,111 | 16,035 | 17,293 | 21,562 |
| No. probable cases | 1,049 | 1,187 | 2,360 | 2,939 | 3,811 | 5,630 | 8,555 | 10,536 | 15,339 | 16,696 | 20,997 |
| No. confirmed cases | 205 | 153 | 253 | 298 | 277 | 390 | 373 | 575 | 696 | 597 | 565 |
| Incidence† |
0.09 |
0.10 |
0.19 |
0.24 |
0.30 |
0.45 |
0.66 |
0.82 |
1.19 |
1.28 |
1.60 |
| Sex | |||||||||||
| M | 642 (51) | 711 (53) | 1,385 (53) | 1,660 (51) | 2,040 (50) | 2,884 (48) | 4,228 (47) | 4,910 (44) | 7,222 (45) | 8,021 (46) | 9,871 (46) |
| F |
612
(49) |
629
(47) |
1,228 (47) |
1,577 (49) |
2,048 (50) |
3,136 (52) |
4,700 (53) |
6,201 (56) |
8,813 (55) |
9,272 (54) |
11,691 (54) |
| Age, y, median (IQR)‡ | 46 (27–58) | 46 (27–59) | 48 (30–60) | 44 (25–57) | 46 (28–59) | 50 (33–61) | 50 (36–62) | 51 (38–62) | 52 (39–63) | 53 (42–64) | 53 (41–64) |
| <5 | 86 (7) | 92 (7) | 198 (8) | 279 (9) | 358 (9) | 423 (7) | 606 (7) | 638 (6) | 775 (5) | 681 (4) | 928 (4) |
| 5–14 | 143 (11) | 139 (10) | 173 (7) | 341 (11) | 344 (8) | 401 (7) | 539 (6) | 629 (6) | 811 (5) | 716 (4) | 899 (4) |
| 15–44 | 373 (30) | 402 (30) | 783 (30) | 1,012 (31) | 1,200 (29) | 1,543 (26) | 2,147 (24) | 2,589 (23) | 3,683 (23) | 3,738 (22) | 4,578 (21) |
| 45–60 | 397 (32) | 415 (31) | 878 (34) | 1,001 (31) | 1,320 (32) | 2,035 (34) | 3,169 (35) | 4,038 (36) | 5,791 (36) | 6,339 (37) | 7,797 (36) |
| >61 |
255
(20) |
292
(22) |
581
(22) |
604
(19) |
866
(21) |
1,618 (27) |
2,467 (28) |
3,217 (29) |
4,975 (31) |
5,819 (34) |
7,360 (34) |
| Residence§ | |||||||||||
| Rural | 892 (76) | 1,023 (79) | 2,108 (83) | 2,758 (87) | 3,512 (88) | 5,231 (88) | 7,725 (87) | 9,622 (87) | 13,803 (87) | 15,058 (88) | 18,597 (89) |
| Urban |
279
(24) |
264
(21) |
424
(17) |
408
(13) |
477
(12) |
718
(12) |
1,170 (13) |
1,443 (13) |
2,105 (13) |
2,051 (12) |
2,414 (11) |
| Occupation, farmer | 733 (58) | 859 (64) | 1,700 (65) | 2,079 (64) | 2,721 (67) | 4,250 (71) | 6,179 (69) | 7,853 (71) | 11,842 (74) | 13,230 (77) | 16,670 (77) |
| No. in endemic province | 16 | 19 | 18 | 22 | 20 | 20 | 23 | 21 | 27 | 26 | 25 |
| No. in endemic county | 222 | 225 | 327 | 372 | 431 | 509 | 582 | 692 | 769 | 809 | 883 |
| No. in endemic township | 616 | 683 | 1,183 | 1,283 | 1,523 | 2,088 | 2,644 | 3,264 | 4,125 | 4,353 | 5,025 |
| No. deaths | 0 | 1 | 3 | 0 | 11 | 6 | 9 | 4 | 8 | 3 | 12 |
*Values are no. (%) except as indicated. IQR, interquartile range.
†No. cases/100,000 population.
‡Some columns do not add up to 100% because of rounding.
§Some columns do not add up to equal the total because of missing data.
1These first authors contributed equally to this article.
2These senior authors contributed equally to this article.
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Page updated: May 18, 2020
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