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| Content Provider | Springer Nature : BioMed Central |
|---|---|
| Author | Agaba, Bosco B. Anderson, Karen Gresty, Karryn Prosser, Christiane Smith, David Nankabirwa, Joaniter I. Nsobya, Sam Yeka, Adoke Opigo, Jimmy Gonahasa, Samuel Namubiru, Rhoda Arinaitwe, Emmanuel Mbaka, Paul Kissa, John Won, Sungho Lee, Bora Lim, Chae Seung Karamagi, Charles Cunningham, Jane Nakayaga, Joan K. Kamya, Moses R. Cheng, Qin |
| Abstract | Background Histidine-rich protein-2 (HRP2)-based rapid diagnostic tests (RDTs) are the only RDTs recommended for malaria diagnosis in Uganda. However, the emergence of Plasmodium falciparum histidine rich protein 2 and 3 (pfhrp2 and pfhrp3) gene deletions threatens their usefulness as malaria diagnostic and surveillance tools. The pfhrp2 and pfhrp3 gene deletions surveillance was conducted in P. falciparum parasite populations in Uganda. Methods Three-hundred (n = 300) P. falciparum isolates collected from cross-sectional malaria surveys in symptomatic individuals in 48 districts of eastern and western Uganda were analysed for the presence of pfhrp2 and pfhrp3 genes. Presence of parasite DNA was confirmed by PCR amplification of the 18s rRNA gene, msp1 and msp2 single copy genes. Presence or absence of deletions was confirmed by amplification of exon1 and exon2 of pfhrp2 and pfhrp3 using gene specific PCR. Results Overall, pfhrp2 and pfhrp3 gene deletions were detected in 29/300 (9.7%, 95% CI 6.6–13.6%) parasite isolates. The pfhrp2 gene was deleted in 10/300 (3.3%, 95% CI 1.6–6.0%) isolates, pfhrp3 in 9/300 (3.0%, 95% CI 1.4–5.6%) while both pfhrp2 and pfhrp3 were deleted in 10/300 (3.3%, 95% CI 1.6–6.0%) parasite isolates. Proportion of pfhrp2/3 deletions was higher in the eastern 14.7% (95% CI 9.7–20.0%) compared to the western region 3.1% (95% CI 0.8–7.7%), p = 0.001. Geographical location was associated with gene deletions aOR 6.25 (2.02–23.55), p = 0.003. Conclusions This is the first large-scale survey reporting the presence of pfhrp2/3 gene deletions in P. falciparum isolates in Uganda. Roll out of RDTs for malaria diagnosis should take into consideration the existence of pfhrp2/3 gene deletions particularly in areas where they were detected. Periodic pfhrp2/3 surveys are recommended to inform future decisions for deployment of alternative RDTs. |
| Related Links | https://malariajournal.biomedcentral.com/counter/pdf/10.1186/s12936-020-03362-x.pdf |
| Ending Page | 14 |
| Page Count | 14 |
| Starting Page | 1 |
| File Format | HTM / HTML |
| ISSN | 14752875 |
| DOI | 10.1186/s12936-020-03362-x |
| Journal | Malaria Journal |
| Issue Number | 1 |
| Volume Number | 19 |
| Language | English |
| Publisher | BioMed Central |
| Publisher Date | 2020-08-26 |
| Access Restriction | Open |
| Subject Keyword | Parasitology Tropical Medicine Infectious Diseases Entomology Microbiology Public Health Plasmodium falciparum Malaria rapid diagnostic tests Histidine rich protein 2 Histidine rich protein 3 Gene deletion Deoxyribonucleic acid Microscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Parasitology |
| Journal Impact Factor | 2.4/2023 |
| 5-Year Journal Impact Factor | 2.6/2023 |
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