Robert O. Opoka

9.3k total citations · 1 hit paper
217 papers, 5.7k citations indexed

About

Robert O. Opoka is a scholar working on Public Health, Environmental and Occupational Health, Genetics and Hematology. According to data from OpenAlex, Robert O. Opoka has authored 217 papers receiving a total of 5.7k indexed citations (citations by other indexed papers that have themselves been cited), including 110 papers in Public Health, Environmental and Occupational Health, 69 papers in Genetics and 48 papers in Hematology. Recurrent topics in Robert O. Opoka's work include Malaria Research and Control (92 papers), Hemoglobinopathies and Related Disorders (69 papers) and Mosquito-borne diseases and control (45 papers). Robert O. Opoka is often cited by papers focused on Malaria Research and Control (92 papers), Hemoglobinopathies and Related Disorders (69 papers) and Mosquito-borne diseases and control (45 papers). Robert O. Opoka collaborates with scholars based in Uganda, United States and Canada. Robert O. Opoka's co-authors include Chandy C. John, Paul Bangirana, Michael J. Boivin, Richard Idro, Andrea L. Conroy, Justus Byarugaba, Michael Hawkes, Anne M. Jurek, Kevin C. Kain and Sarah Kiguli and has published in prestigious journals such as New England Journal of Medicine, The Lancet and JAMA.

In The Last Decade

Robert O. Opoka

203 papers receiving 5.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Mortality after Fluid Bolus in African Children with Severe Infection

2011 958 citations Kathryn Maitland, Sarah Kiguli et al. profile →

Peers

Robert O. Opoka

PHEOH

EPIDE

PPCH

IMMUN

GENET

Chandy C. John United States

Richard Idro Uganda

Arnon Afek Israel

Shelly Lensing United States

Z. Jennie United States

Yaron Finkelstein Canada

Annie Robert Belgium

Richard B. Gearry New Zealand

James J. Grady United States

Peter Bartmann Germany

Chandy C. John United States

Robert O. Opoka

4.0k ×1.6

PHEOH

595 ×0.6

EPIDE

867 ×0.9

PPCH

1.2k ×1.7

IMMUN

551 ×0.8

GENET

Citations per year, relative to Robert O. Opoka Robert O. Opoka (= 1×) peers Chandy C. John

Countries citing papers authored by Robert O. Opoka

Since Specialization

Citations

This map shows the geographic impact of Robert O. Opoka's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Robert O. Opoka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert O. Opoka more than expected).

Fields of papers citing papers by Robert O. Opoka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert O. Opoka. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Robert O. Opoka. The network helps show where Robert O. Opoka may publish in the future.

Co-authorship network of co-authors of Robert O. Opoka

This figure shows the co-authorship network connecting the top 25 collaborators of Robert O. Opoka. A scholar is included among the top collaborators of Robert O. Opoka based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Robert O. Opoka. Robert O. Opoka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Power‐Hays, Alexandra, Kathryn McElhinney, Thomas N. Williams, et al.. (2025). Hydroxyurea pharmacokinetics in children with sickle cell anemia across different global populations. Blood Advances. 10(2). 418–427.

Namazzi, Ruth, et al.. (2025). Cerebral Malaria and Severe Malarial Anemia, but not Other Forms of Severe Malaria, Are Associated With Long-Term Cognitive Impairment. Clinical Infectious Diseases.

Mzinza, David, Ruth Namazzi, Robert O. Opoka, et al.. (2025). Gut bacterial dysbiosis in pediatric severe malaria associates with post-discharge mortality. Nature Communications. 16(1). 9658–9658.

Ssenkusu, John M., Zhezhen Jin, Caterina Rosano, et al.. (2025). Neurocognitive gains among Ugandan children with sickle cell anemia on hydroxyurea: 18-month interim trial results. Blood Advances. 9(12). 3116–3127.

Opoka, Robert O., et al.. (2024). Severe falciparum malaria in young children is associated with an increased risk of post-discharge hospitalization: a prospective cohort study. Malaria Journal. 23(1). 367–367. 1 indexed citations

Namazzi, Ruth, Andrea L. Conroy, Dibyadyuti Datta, et al.. (2024). Hydroxyurea reduces infections in children with sickle cell anemia in Uganda. Blood. 143(14). 1425–1428. 5 indexed citations

Datta, Dibyadyuti, Paul Bangirana, Robert O. Opoka, et al.. (2023). Blood biomarkers of neuronal injury in paediatric cerebral malaria and severe malarial anaemia. Brain Communications. 5(6). fcad323–fcad323. 4 indexed citations

Opoka, Robert O., Phillip Kasirye, Heather Hume, et al.. (2023). Cost-Effectiveness of Hydroxyurea for Sickle Cell Anemia in a Low-Income African Setting: A Model-Based Evaluation of Two Dosing Regimens. PharmacoEconomics. 41(12). 1603–1615. 7 indexed citations

Watson, James A, Sophie Uyoga, Perpetual Wanjiku, et al.. (2022). Improving the diagnosis of severe malaria in African children using platelet counts and plasma Pf HRP2 concentrations. Science Translational Medicine. 14(654). eabn5040–eabn5040. 25 indexed citations

10.

Cha, Sung‐Jae, Brian D. Gregory, Yong Seok Lee, et al.. (2022). Identification of Key Determinants of Cerebral Malaria Development and Inhibition Pathways. mBio. 13(1). e0370821–e0370821. 3 indexed citations

11.

Conroy, Andrea L., Tuan M. Tran, Robert O. Opoka, et al.. (2022). Plasma Amino Acid Concentrations in Children With Severe Malaria Are Associated With Mortality and Worse Long-term Kidney and Cognitive Outcomes. The Journal of Infectious Diseases. 226(12). 2215–2225. 7 indexed citations

12.

Sharma, Jitendar, Sophie Namasopo, Robert O. Opoka, et al.. (2022). Implementation of solar powered oxygen delivery in a conflict zone: preliminary findings from Somalia on feasibility and usefulness. Medicine Conflict & Survival. 38(2). 140–158. 4 indexed citations

13.

Mandal, Rabindra K., Joshua E. Denny, Ruth Namazzi, et al.. (2021). Dynamic modulation of spleen germinal center reactions by gut bacteria during Plasmodium infection. Cell Reports. 35(6). 109094–109094. 24 indexed citations

14.

Maitland, Kathryn, Sarah Kiguli, Peter Olupot‐Olupot, et al.. (2021). Transfusion management of severe anaemia in African children: a consensus algorithm. British Journal of Haematology. 193(6). 1247–1259. 15 indexed citations

15.

Henrici, Ryan C., Robert O. Opoka, Ruth Namazzi, et al.. (2021). Decreased parasite burden and altered host response in children with sickle cell anemia and severe anemia with malaria. Blood Advances. 5(22). 4710–4720. 15 indexed citations

16.

Namazzi, Ruth, Gregory S. Park, Dibyadyuti Datta, et al.. (2019). Retinopathy-Positive Cerebral Malaria Is Associated With Greater Inflammation, Blood-Brain Barrier Breakdown, and Neuronal Damage Than Retinopathy-Negative Cerebral Malaria. Journal of the Pediatric Infectious Diseases Society. 9(5). 580–586. 17 indexed citations

17.

Park, Gregory S., et al.. (2018). Whole-Blood Transcriptional Signatures Composed of Erythropoietic and NRF2-Regulated Genes Differ Between Cerebral Malaria and Severe Malarial Anemia. The Journal of Infectious Diseases. 219(1). 154–164. 20 indexed citations

18.

Opoka, Robert O., Christopher M. Ndugwa, Teresa Latham, et al.. (2017). Novel use Of Hydroxyurea in an African Region with Malaria (NOHARM): a trial for children with sickle cell anemia. Blood. 130(24). 2585–2593. 98 indexed citations

19.

Kasirye, Phillip, Heather Hume, Robert O. Opoka, et al.. (2016). Novel Use of Hydroxyurea in an African Region With Malaria: Protocol for a Randomized Controlled Clinical Trial. JMIR Research Protocols. 5(2). e110–e110. 18 indexed citations

20.

Boivin, Michael J., Paul Bangirana, Justus Byarugaba, et al.. (2007). Cognitive Impairment After Cerebral Malaria in Children: A Prospective Study. PEDIATRICS. 119(2). e360–e366. 214 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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