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Table 1 Characteristics of malaria cases at control stage and elimination stage in China

From: Comparative evaluation of the diagnosis, reporting and investigation of malaria cases in China, 2005–2014: transition from control to elimination for the national malaria programme

Characteristics

Control stage (2005–2010)

Elimination stage (2011–2014)

2005

2006

2007

2008

2009

2010

Average per year

2011

2012

2013

2014

Average per year

Number of cases

40,226

61,204

47,380

26,727

14,278

7506

32,887

4127

2453

3905

2924

3352

Incidence rate (per 100 000)

3.1

4.7

3.6

2.0

1.1

0.6

2.5

0.3

0.2

0.3

0.2

0.2

Cases by species

P. vivax

30,692

48,169

38,768

21,322

10,747

4956

25,776

2432

1021

897

851

5201

 (%)

(76.3)

(78.7)

(81.8)

(79.8)

(75.3)

(66.0)

(78.4)

(58.9)

(41.6)

(23.0)

(29.1)

(38.8)

P. falciparum

3771

2872

1691

1025

1043

1304

1951

1442

1354

2825

1844

7465

 (%)

(9.4)

(4.7)

(3.6)

(3.8)

(7.3)

(17.4)

(5.9)

(35.0)

(55.2)

(72.3)

(63.1)

(55.7)

 Others

5763

10,163

6921

4380

2488

1246

5160

253

78

183

229

743

 (%)

(14.3)

(16.6)

(14.6)

(16.4)

(17.3)

(16.6)

(15.7)

(6.1)

(3.2)

(4.7)

(7.8)

(5.5)

Cases by residence

 Local

36,009

55,999

43,489

24,180

12,413

5849

29,657

2639

1325

2413

1538

1979

 (%)

(89.5)

(91.5)

(91.8)

(90.5)

(86.9)

(77.9)

(90.2)

(63.9)

(54.0)

(61.8)

(52.6)

(59.0)

 Migrant

4217

5205

3891

2547

1865

1657

3230

1488

1128

1492

1386

1373

 (%)

(10.5)

(8.5)

(8.2)

(9.5)

(13.1)

(22.1)

(9.8)

(36.1)

(46.0)

(38.2)

(47.4)

(41.0)

Cases by locationa

 24 endemic provinces

40,182

61,130

47,312

26,659

14,221

7436

32,823

4033

2386

3801

2837

3264

 (%)

(99.9)

(99.9)

(99.7)

(99.8)

(99.6)

(99.1)

(99.8)

(97.7)

(97.3)

(97.3)

(97.0)

(97.4)

 7 non-endemic provinces

44

74

68

68

57

70

64

94

67

104

87

88

 (%)

(0.1)

(0.1)

(0.3)

(0.2)

(0.4)

(0.9)

(0.2)

(2.3)

(2.7)

(2.7)

(3.0)

(2.6)

Cases by reporting institutes

 Private clinics and hospitals

321

334

540

347

193

182

320

62

41

69

57

57

 (%)

(0.8)

(0.6)

(1.1)

(1.3)

(1.3)

(2.4)

(1.0)

(1.5)

(1.7)

(1.8)

(2.0)

(1.7)

 Town-level hospitals

24,433

44,923

34,466

17,870

8767

3449

22,318

1379

298

174

129

495

 (%)

(60.7)

(73.4)

(72.7)

(66.8)

(61.4)

(46.0)

(67.9)

(33.4)

(12.2)

(4.4)

(4.4)

(14.8)

 County-level hospitals

5400

5764

4919

3278

1742

865

3661

403

327

711

448

472

 (%)

(13.4)

(9.4)

(10.4)

(12.3)

(12.2)

(11.5)

(11.1)

(9.8)

(13.3)

(18.2)

(15.3)

(14.1)

 City-level hospitals

2562

2878

2490

1840

1352

1333

2076

1186

923

1342

1363

1204

 (%)

(6.4)

(4.7)

(5.3)

(6.9)

(9.5)

(17.8)

(6.3)

(28.7)

(37.6)

(34.4)

(46.6)

(35.9)

 Public health institutes

7510

7305

4965

3392

2224

1677

4512

1097

864

1609

927

1124

 (%)

(18.7)

(11.9)

(10.5)

(12.7)

(15.6)

(22.3)

(13.7)

(26.6)

(35.2)

(41.2)

(31.7)

(33.5)

Cases by originb

 Autochthonous cases

1507

253

92

67

480

 (%)

(36.5)

(10.3)

(2.4)

(2.3)

(14.3)

 Imported cases

2620

2200

3813

2857

2872

 (%)

(63.5)

(89.7)

(97.6)

(97.7)

(85.7)

  1. aEndemic provinces include Liaoning, Xinjiang, Hebei, Shanxi, Shaanxi, Shandong, Henan, Jiangsu, Shanghai, Zhejiang, Anhui, Hubei, Hunan, Jiangxi, Fujian, Guangdong, Hainan, Guangxi, Yunnan, Sichuan, Guizhou, Chongqing, Tibet, and Gansu; non-endemic provinces include Beijing, Tianjin, Inner Mongolia, Heilongjiang, Jilin, Qinghai, Ningxia, according to the national malaria elimination program [3]
  2. bOnly the origins of cases occurring within the period 2011–2014 were included in this study, because each malaria case was required to be classified as either autochthonous or imported since 2010, according to the national malaria elimination program [3]