Table 1 Basic information of falciparum malaria cases and PfCSP sequencing samples among Chinese migrant workers returning from Africa during 2016–2018
Characteristics | No. of cases | Composition ratio (%) | No. of successfully sequenced samples | Composition ratio (%) |
|---|---|---|---|---|
Sex | ||||
 Male | 282 | 98.26 | 197 | 98.01 |
 Female | 5 | 1.74 | 4 | 1.99 |
Age | ||||
 18–55 | 283 | 98.61 | 197 | 98.01 |
 ≥ 56 | 4 | 1.39 | 4 | 1.99 |
Source of infection | ||||
 West Africa | ||||
  Nigeria | 45 | 15.68 | 32 | 15.92 |
  Guinea | 20 | 6.97 | 11 | 5.47 |
  Ghana | 15 | 5.23 | 15 | 7.46 |
  Ivory Coast | 10 | 3.48 | 7 | 3.48 |
  Sierra leone | 10 | 3.48 | 7 | 3.48 |
  Liberia | 9 | 3.13 | 7 | 3.48 |
  Benin | 2 | 0.70 | 2 | 0.99 |
  Togo | 2 | 0.70 | 0 | 0 |
  Senegal | 2 | 0.70 | 2 | 0.99 |
 South Africa | ||||
  Angola | 55 | 19.16 | 40 | 19.90 |
  Zambia | 13 | 4.53 | 9 | 4.48 |
  Mozambique | 8 | 2.79 | 4 | 1.99 |
  Republic of South Africa | 3 | 1.05 | 2 | 0.99 |
  Malawi | 1 | 0.35 | 1 | 0.50 |
  Madagascar | 1 | 0.35 | 1 | 0.50 |
  Central Africa | ||||
  Congo | 20 | 6.97 | 12 | 5.97 |
  Democratic Republic of Congo | 13 | 4.53 | 10 | 4.98 |
  Cameroon | 13 | 4.53 | 10 | 4.98 |
  Equatorial Guinea | 9 | 3.13 | 9 | 4.48 |
  Chad | 4 | 1.39 | 2 | 0.99 |
  Central African Republic | 4 | 1.39 | 3 | 1.50 |
  Gabon | 3 | 1.05 | 2 | 0.99 |
 East Africa | ||||
  Tanzania | 11 | 3.83 | 4 | 1.99 |
  Uganda | 9 | 3.13 | 5 | 2.49 |
  South Sudan | 1 | 0.35 | 1 | 0.50 |
  Ethiopia | 1 | 0.35 | 0 | 0 |
 North Africa | ||||
  Sudan | 3 | 1.05 | 3 | 1.50 |