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Table 1 Basic information of falciparum malaria cases and PfCSP sequencing samples among Chinese migrant workers returning from Africa during 2016–2018

From: Genetic polymorphism of circumsporozoite protein of Plasmodium falciparum among Chinese migrant workers returning from Africa to Henan Province

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