Volume 27, Number 2—February 2021
Research
Plasmodium falciparum Histidine-Rich Protein 2 and 3 Gene Deletions in Strains from Nigeria, Sudan, and South Sudan
Table 2
Assessment of HRP2-based SD BioLine RDT for pfhrp2/pfhrp3 deletion genotypes for Plasmodium spp. isolates, by parasite country of origin, Australia*
Country | Sample ID | Collection year | Parasitemia, % erythrocytes | Parasites/μL blood | Genotype, pfhrp2/pfhrp3 | BioLine RDT† |
|
---|---|---|---|---|---|---|---|
Pan | Pf | ||||||
Sudan | BDA1 | 2016 | 0.16 | 8,000 | +/+ | 1 | 2 |
Sudan | BDA2 | 2016 | 0.79 | 39,500 | –/+ | 1 | 3 |
Sudan | BDA3 | 2016 | 0.3 | 15,000 | –/+ | 0 | 1 |
Sudan | BDA4 | 2016 | 0.02 | 1,000 | –/+ | 0 | 1 |
Sudan |
BDA37 |
2014 |
<0.01 |
NA |
–/+ |
0 |
0 |
South Sudan | BDD4 | 2018 | 1.24 | 62,000 | +/– | 1† | 3 |
South Sudan | BDC98 | 2018 | 0.5 | 25,000 | –/+ | 1 | 1 |
South Sudan | BDB94 | 2017 | 0.5 | 25,000 | –/+ | 1 | 1 |
South Sudan |
BDB99 |
2017 |
<0.01 |
NA |
–/+ |
0 |
1† |
Nigeria | BDA24 | 2015 | 1.1 | 55,000 | –/+ | 0 | 1 |
Nigeria | BDA92 | 2012 | 4 | 200,000 | –/+ | 1 | 1 |
Nigeria | BDA91 | 2012 | 2.5 | 125,000 | –/+ | 1 | 1 |
Nigeria |
BDB31 |
2011 |
0.08 |
4,000 |
–/+ |
0 |
0 |
Kenya | BDA42 | 2014 | 0.12 | 6,000 | –/+ | 2 | 1 |
Kenya |
BDB19 |
2011 |
<0.01 |
NA |
+/+ |
0 |
3 |
Ghana |
BDA5 |
2016 |
<0.01 |
NA |
–/+ |
1‡ |
1‡ |
Tanzania |
BDA28 |
2015 |
<0.01 |
NA |
–/+ |
0 |
1 |
Zambia |
BDA31 |
2015 |
0.2 |
10,000 |
–/+ |
0 |
1 |
Togo |
BDA50 |
2014 |
0.27 |
13,500 |
–/+ |
0 |
1 |
Peru |
BDA52 |
2014 |
0.4 |
20,000 |
+/– |
1 |
3 |
Papua New Guinea | BDB6 | 2012 | 2.81 | 140,500 | +/+ | 1‡ | 2 |
Papua New Guinea |
BDB5 |
2012 |
<0.01 |
NA |
+/+ |
1‡ |
1 |
Africa | BDA99 | 2012 | 0.46 | 23,000 | +/+ | 0 | 3 |
Africa | BDA90 | 2012 | 1.2 | 60,000 | +/+ | 0 | 3 |
Africa | BDA100 | 2012 | <0.01 | NA | +/+ | 0 | 1 |
Africa | BDB11 | 2011 | <0.01 | NA | –/+ | 0 | 0 |
Africa | BDB46 | 2010 | 0.01 | 500 | –/+ | 0 | 0 |
*Gray shading signifies a negative result with both the pan-pLDH and pfHRP2 antigen tests on the RDT. Africa indicates unknown country of origin. ID, identification; NA, not applicable; pan, pan–Plasmodium spp.; Pf, P. falciparum; pfHRP2, Plasmodium falciparum histidine-rich protein 2; pLDH, Plasmodium lactate dehydrogenase; RDT, rapid diagnostic test. †0–4 result scored by World Health Organization guidelines. ‡Sample results matched outcomes using CareStart Malaria RDT, whereas parasites were not detected by BinaxNOW RDT (Appendix Figures 2, 3).