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Table 2 Natural selection test and recombination analysis of Henan Province imported PfCSP and African native PfCSP C-termini

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

Sample source N K S H Hd ± SD dN-dS Tajima's D Fu and Li's D Fu and Li's F Ra Rb Rm
Africa    
 Congo 3 9.000 13 3 1.000 ± 0.272 0.076
 Cameroon 9 4.556 12 7 0.944 ± 0.070 0.038 − 0.84239 − 0.68964 − 0.81319 0.1006 15.9 2
 Kenya 18 5.843 18 13 0.928 ± 0.052 0.043 − 0.16823 − 0.13098 − 0.16414 0.1500 23.7 6
 Ghana 34 5.062 18 19 0.930 ± 0.027 0.042 − 0.20329 0.46554 0.29096 0.1025 16.2 6
 Gambia 44 5.966 18 21 0.951 ± 0.016 0.049 0.77207 1.34810 1.36435 0.1962 31.0 5
 Tanzania 60 6.382 21 29 0.966 ± 0.009 0.053 0.60634 0.80724 0.87500 0.2013 31.8 6
 Equatorial Guinea 96 4.906 21 33 0.948 ± 0.009 0.040 0.02365 − 0.40660 − 0.28991 0.1968 31.1 6
 Total 264 5.566 27 60 0.959 ± 0.004 0.046 0.19441 − 0.70174 − 0.38625 0.1683 26.6 7
Cases from Africa back to Henan province   
 North Africa 3 3.333 5 2 0.667 ± 0.314 0.027
 East Africa 10 4.311 11 9 0.978 ± 0.054 0.035 − 0.28143 − 0.26257 − 0.30086 0.8861 140 2
 Central Africa 48 5.561 17 23 0.942 ± 0.017 0.046 0.56577 0.29295 0.45903 0.1108 17.5 6
 South Africa 57 6.056 18 30 0.963 ± 0.012 0.05 0.85180 1.37988 1.41794 0.3728 58.9 7
 West Africa 83 5.692 20 34 0.964 ± 0.008 0.047 0.55706 0.32378 0.49098 0.1399 22.1 6
 Total 201 5.719 21 60 0.964 ± 0.004 0.047 0.95250 1.00540 1.18403 0.1905 30.1 9
  1. N Sample size, SD standard deviation
  2. *P < 0.05; – The corresponding value cannot be calculated because there were few sequences (≤ 3)