Category
Dr Charvy Narain holds a doctorate in Neurosciences from the University of Oxford, and has worked in research communications for over 15 years. In her currently role as Communications Manager for IDDO, she provides strategic communications advice and implements IDDO's communications strategy across various communications channels, including the IDDO website and social media. She also line manages the IDDO communications officer.
Category
Dr
Caitlin
Naylor
Programme Manager
IDDO
Email
Research Theme
COVID19
Visceral leishmaniasis
Chagas
Caitlin joined IDDO in August 2021 and works as the Programme Manager for the Visceral Leishmaniasis and COVID-19 platforms, managing delivery of these programmes, their scientific research activities and collaborations. Additionally, as part of the IDDO Programme Management team, Caitlin supports wider strategic and operational development for the IDDO portfolio of research themes on neglected poverty-related diseases.
Caitlin has a degree in Biological Sciences from the University of Edinburgh, with an honours specialisation in Infectious Diseases. She went on to complete a PhD at the University of Virginia in microbiology, followed by postdoctoral scientist positions at MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine and at the University of Oxford, researching a range of topics including malnutrition, enteric infections, and malaria.
Category
Caitlin
Richmond
Programme Manager for Malaria/WWARN
Research Theme
Malaria
WWARN
Caitlin joined the IDDO team as the WWARN Programme Manager in February of 2019. In her role, she helps to manage the delivery of scientific research activities and collaborations under the Malaria theme. Caitlin holds a dual degree from Virginia Tech in Psychology and Human Nutrition, Food, and Exercise. She is currently working towards completing a Master in Public Health degree from George Washington University.
Category
Dr
Prabin
Dahal
Head of Statistics
Email
Research Theme
Visceral leishmaniasis
Malaria
Chagas
Trachoma
WWARN
Prabin joined the WorldWide Antimalarial Research Network (WWARN) – the prototypic model to IDDO – as a statistician in September 2011. His work with WWARN included assessment of the relationship between weight-adjusted dose and parasitological outcomes for artemisinin combination therapies.
His doctoral thesis (2015–2018, Linacre College) explored different statistical approaches for handling parasitic recurrences when quantifying antimalarial blood stage efficacy in P. falciparum.
In his current role, Prabin's main focus is the quantification of risk of severe and serious adverse events following antileishmanial therapies. His interest lies in exploring methodological issues in design and analysis of antileishmanial clinical trials.
Research Theme: VL, Malaria, Non-Malarial Febrile Illness
Key Publications
Gender disparity in cases enrolled in clinical trials of visceral leishmaniasis: A systematic review and meta-analysis
Dahal, P., Singh-Phulgenda, S., Olliaro, P., & Guerin, P. (2021). PLoS Neglected Tropical Diseases, 15(3).
Non-malarial febrile illness: a systematic review of published aetiological studies and case reports from Southern Asia and South-eastern Asia, 1980-2015
Shrestha, P., Dahal, P., Ogbonnaa-Njoku, C., Das, D., Stepniewska, K., Thomas, N., Hopkins, H., Crump, J., Bell, D., Newton, P., Ashley, E., & Guérin, P. (2020). BMC Medicine, 18.
Baseline data of parasite clearance in patients with falciparum malaria treated with an artemisinin derivative: an individual patient data meta-analysis
Abdulla, S., Ashley, E., Bassat, Q., Bethell, D., Bjorkman, A., Borrmann, S., D’Alessandro, U., Dahal, P., Day, N., Diakite, M., Djimde, A., Dondorp, A., Duong, S., Edstein, Fairhurst, R., Faiz, M., Falade, C., Flegg, J., Fogg, C., … Winstanley, P. (2015). Malaria Journal, 14(1).
Clinical determinants of early parasitological response to ACTs in African patients with uncomplicated falciparum malaria: a literature review and meta-analysis of individual patient data
Abdulla, S., Adam, I., Adjei, G., Adjuik, M., Alemayehu, B., Allan, R., Arinaitwe, E., Ashley, E., Barennes, H., Barnes, K., Bassat, Q., Baudin, E., Berens-Riha, N., Bjoerkman, A., Bompart, F., Bonnet, M., Borrmann, S., Bousema, T., Brasseur, P., … Gonzalez, R. (2015). BMC Medicine, 13(1).
Clinical determinants of early parasitological response to ACTs in African patients with uncomplicated falciparum malaria: a literature review and meta-analysis of individual patient data
Abdulla, S., Adam, I., Adjei, G., Adjuik, M., Alemayehu, B., Allan, R., Arinaitwe, E., Ashley, E., Barennes, H., Barnes, K., Bassat, Q., Baudin, E., Berens-Riha, N., Bjoerkman, A., Bompart, F., Bonnet, M., Borrmann, S., Bousema, T., Brasseur, P., … Gonzalez, R. (2015). BMC Medicine, 13(1).
The effect of dosing strategies on the therapeutic efficacy of artesunate-amodiaquine for uncomplicated malaria: a meta-analysis of individual patient data
Adjuik, M., Allan, R., Anvikar, A., Ashley, E., Barennes, H., Barnes, K., Bassat, Q., Baudin, E., Bjorkman, A., Bompart, F., Bonnet, M., Borrmann, S., Brasseur, P., Bukirwa, H., Checchi, F., Cot, M., Dahal, P., D’Alessandro, U., Deloron, P., … Ibrahim, L. (2015). BMC Medicine, 13(1).
Polymorphisms in Plasmodium falciparum chloroquine resistance transporter and multidrug resistance 1 genes: parasite risk factors that affect treatment outcomes for P. falciparum malaria after artemether-lumefantrine and artesunate-amodiaquine.
Venkatesan, M., Gadalla, N., Stepniewska, K., Dahal, P., Nsanzabana, C., Moriera, C., Price, R., Mårtensson, A., Rosenthal, P., Dorsey, G., Sutherland, C., Guérin, P., Davis, T., Ménard, D., Adam, I., Ademowo, G., Arze, C., Baliraine, F., Berens-Riha, N., … Ogutu, B. (2014). American Journal of Tropical Medicine and Hygiene, 91(4), 833-843.
The Effect of Dosing Regimens on the Antimalarial Efficacy of Dihydroartemisinin-Piperaquine: A Pooled Analysis of Individual Patient Data
Achan, J., Adam, I., Arinaitwe, E., Ashley, E., Awab, G., Barnes, K., Bassat, Q., Borrmann, S., Bousema, T., Dahal, P., D’Alessandro, U., Davis, T., Dondorp, A., Dorsey, G., Drakeley, C., Fanello, C., Faye, B., Flegg, J., Gaye, O., … Phyo, A. (2013). PLOS MEDICINE, 10(12), 1-17.
The Effect of Dosing Regimens on the Antimalarial Efficacy of Dihydroartemisinin-Piperaquine: A Pooled Analysis of Individual Patient Data
Achan, J., Adam, I., Arinaitwe, E., Ashley, E., Awab, G., Barnes, K., Bassat, Q., Borrmann, S., Bousema, T., Dahal, P., D’Alessandro, U., Davis, T., Dondorp, A., Dorsey, G., Drakeley, C., Fanello, C., Faye, B., Flegg, J., Gaye, O., … Phyo, A. (2013). PLOS MEDICINE, 10(12), 1-17.
All Publications
Mass testing for discovery and control of COVID-19 outbreaks in adult social care: an observational study and cost-effectiveness analysis of 14 805 care homes in England
Chen, S., Creswell, R., Hounsell, R., Cantrell, L., Bajaj, S., Dahal, P., Tsui Lok Hei, J., Kolade, O., Amswych, M., Naidoo, R., Fowler, T., Hopkins, S., Stepniewska, K., Voysey, M., White, L., Shretta, R., & Lambert, B. (2025). BMJ Public Health, 3(1).
A systematic review of the noma evidence landscape: current knowledge and gaps
Maguire, B., Shrestha, R., Dahal, P., Ngu, R., Nizigama, L., Rashan, S., Shrestha, P., Harriss, E., Newton, P., Makino, Y., Varenne, B., & Guérin, P. (2025). In medRxiv.
COVID-19 testing and reporting behaviours in England across different sociodemographic groups: a population-based study using testing data and data from community prevalence surveillance surveys
Bajaj, S., Chen, S., Creswell, R., Naidoo, R., Tsui, J.-H., Kolade, O., Nicholson, G., Lehmann, B., Hay, J., Kraemer, M., Aguas, R., Donnelly, C., Fowler, T., Hopkins, S., Cantrell, L., Dahal, P., White, L., Stepniewska, K., Voysey, M., … White, L. (2024). The Lancet Digital Health, 6(11), e778 - e790.
Non-malarial febrile illness: a systematic review of published aetiological studies and case reports from China, 1980–2015
Ip, D., Ng, Y., Tam, Y., Thomas, N., Dahal, P., Stepniewska, K., Newton, P., Guérin, P., & Hopkins, H. (2024). BMC Infectious Diseases, 24(1).
Blood transfusion in the care of patients with visceral leishmaniasis: a review of practices in therapeutic efficacy studies.
Dahal, P., Singh-Phulgenda, S., Wilson, J., Cota, G., Ritmeijer, K., Musa, A., Alves, F., Stepniewska, K., & Guerin, P. (2024). Transactions of the Royal Society of Tropical Medicine and Hygiene, 118(8), 481-490.
Design, Conduct, Analysis, and Reporting of Therapeutic Efficacy Studies in Visceral Leishmaniasis: A Systematic Review of Published Reports, 2000-2021.
Dahal, P., Singh-Phulgenda, S., Naylor, C., Brack, M., Chatterjee, M., Alves, F., Guerin, P., & Stepniewska, K. (2024). The American Journal of Tropical Medicine and Hygiene, 111(2), 365-376.
Understanding COVID-19 testing behaviour in England through a sociodemographic lens: a population based study
Bajaj, S., Chen, S., Creswell, R., Naidoo, R., Tsui, J., Nicholson, G., Hay, J., Kraemer, M., Aguas, R., Donnelly, C., Cantrell, L., Dahal, P., White, L., Stepniewska, K., Voysey, M., & Lambert, B. (2024). Lancet Digital Health.
An evaluation of the national testing response during the COVID-19 pandemic in England: a multistage mixed-methods study protocol
Naidoo, R., Lambert, B., Voysey, M., Shretta, R., Keene, C., Wanat, M., Andersen-Waine, B., Dahal, P., Stepniewska, K., Hounsell, R., Molyneux, S., Pinto-Duschinsky, S., Rowe, E., Yenidogan, G., Fowler, T., White, L., & Consortium, E.-O. (2024). BMJ Open, 14(6).
Post-kala-azar dermal leishmaniasis (PKDL) drug efficacy study landscape: A systematic scoping review of clinical trials and observational studies to assess the feasibility of establishing an individual participant-level data (IPD) platform
Singh-Phulgenda, S., Kumar, R., Dahal, P., Munir, A., Rashan, S., Chhajed, R., Naylor, C., Maguire, B., Siddiqui, N., Harriss, E., Rahi, M., Alves, F., Sundar, S., Stepniewska, K., Musa, A., Guerin, P., & Pandey, K. (2024). PLoS Neglected Tropical Diseases, 18(4).
Decision to self-isolate during the COVID-19 pandemic in the UK: a rapid scoping review.
Keene, C., Dickinson, S., Naidoo, R., Andersen-Waine, B., Ferguson-Lewis, A., Polner, A., Amswych, M., White, L., Molyneux, S., Wanat, M., & EY-Oxford Health Analytics Consortium. (2024). BMJ Open, 14(3), e084437.
Estimating the proportion of relapse following treatment of Visceral Leishmaniasis: meta-analysis using Infectious Diseases Data Observatory (IDDO) systematic review.
Chhajed, R., Dahal, P., Singh-Phulgenda, S., Brack, M., Naylor, C., Sundar, S., Alves, F., Stepniewska, K., & Guerin, P. (2024). The Lancet Regional Health. Southeast Asia, 22, 100317.
COVID-19 mass testing in adult social care in England
Chen, S., Creswell, R., Hounsell, R., Cantrell, L., Bajaj, S., Dahal, P., Tsui, L., Kolade, O., Amswych, M., Naidoo, R., Fowler, T., Hopkins, S., Stepniewska, K., Voysey, M., White, L., Shretta, R., & Lambert, B. (2024). In medRxiv.
Prognostic models predicting clinical outcomes in patients diagnosed with visceral leishmaniasis: a systematic review
Wilson, J., Chowdhury, F., Hassan, S., Harriss, E., Alves, F., Musa, A., Dahal, P., Stepniewska, K., & Guerin, P. (2024, January 1).
Prognostic models predicting clinical outcomes in patients diagnosed with visceral leishmaniasis: a systematic review
Wilson, J., Chowdhury, F., Hassan, S., Harriss, E., Alves, F., Musa, A., Dahal, P., Stepniewska, K., & Guerin, P. (2024, January 1).
Factors associated with death in patients admitted with Ebola virus disease to Ebola Treatment Units in Guinea, Sierra Leone, and Liberia – December 2013 to March 2016
Yeabah, T., Kaba, I., Ramaswamy, G., Dahal, P., Delamou, A., Vonhm, B., Jetoh, R., Merson, L., Levine, A., Relan, P., Harries, A., & Kumar, A. (2024). In F1000Res.
PA-340 A systematic review of the efficacy of artemisinin-based combination therapy (ACT) in people living with HIV (PLHIV) diagnosed with uncomplicated Plasmodium falciparum malaria in Africa
Takyi, A., Soma, A., Przybylska, M., Harriss, E., Carrara, V., Barnes, K., Dahal, P., Guérin, P., & Stepniewska, K. (2023). a67.1 - a6a67.
Haematological dynamics following treatment of visceral leishmaniasis: a protocol for systematic review and individual participant data (IPD) meta-analysis.
Munir, A., Dahal, P., Kumar, R., Singh-Phulgenda, S., Siddiqui, N., Naylor, C., Wilson, J., Buck, G., Rahi, M., Alves, F., Malaviya, P., Sundar, S., Ritmeijer, K., Stepniewska, K., Pandey, K., Guérin, P., & Musa, A. (2023). BMJ Open, 13(12), e074841.
Characterisation of populations at risk of sub-optimal dosing of artemisinin-based combination therapy in Africa
Takyi, A., Carrara, V., Dahal, P., Przybylska, M., Harriss, E., Insaidoo, G., Barnes, K., Guerin, P., & Stepniewska, K. (2023). PLOS Global Public Health, 3(12), e0002059.
Enhanced effect of seasonal malaria chemoprevention when coupled with nutrients supplementation for preventing malaria in children under 5 years old in Burkina Faso: a randomized open label trial.
Sondo, P., Kaboré, B., Rouamba, T., Compaoré, E., Tibiri, Y., Kaboré, H.-E., Derra, K., Tahita, M., Ilboudo, H., Tougri, G., Bouda, I., Dakyo, T., Kafando, H., Ouédraogo, F., Rouamba, E., Hien, S.-V., Kazienga, A., Compaoré, C., Bambara, E., … Tinto, H. (2023). Malaria Journal, 22(1), 315.
Host, parasite and drug determinants of clinical outcomes following treatment of visceral leishmaniasis: a protocol for individual participant data meta-analysis.
Kumar, R., Dahal, P., Singh-Phulgenda, S., Siddiqui, N., Munir, A., Naylor, C., Wilson, J., Buck, G., Rahi, M., Malaviya, P., Alves, F., Sundar, S., Ritmeijer, K., Stepniewska, K., Guérin, P., & Pandey, K. (2023). BMJ Open, 13(10), e074679.
Prognostic prediction models for clinical outcomes in patients diagnosed with visceral leishmaniasis: protocol for a systematic review
Wilson, J., Chowdhury, F., Hassan, S., Harriss, E., Alves, F., Dahal, P., Stepniewska, K., & Guérin, P. (2023). BMJ Open, 13(10), e075597.
Neglected tropical diseases in Republic of Guinea: disease endemicity, case burden and the road towards the 2030 target.
Cherif, M., Keita, M., Dahal, P., Guilavogui, T., Beavogui, A., Diassy, L., Conde, M., Touré, A., & Delamou, A. (2023). International Health, 15(5), 490-504.
Seroepidemiology of Lassa virus in pregnant women in Southern Nigeria: a prospective hospital-based cohort study
Kayem, N., Okogbenin, S., Okoeguale, J., Momoh, M., Njoku, A., Eifediyi, R., Enodiana, X., Ngwu, H., Irhiogbe, W., Ighodalo, Y., Olokor, T., Odigie, G., Castle, L., Duraffour, S., Oestereich, L., Dahal, P., Ariana, P., Gunther, S., & Horby, P. (2023). PLoS Neglected Tropical Diseases, 17(5).
Transplacental transfer of Lassa IgG antibodies in pregnant women in Southern Nigeria: a prospective hospital-based cohort study
Kayem, N., Okogbenin, S., Okoeguale, J., Eigbefoh, J., Ikheloa, J., Eifediyi, R., Enodiana, X., Olorogbogo, O., Aikpokpo, I., Ighodalo, Y., Olokor, T., Odigie, G., Castle, L., Duraffour, S., Oestereich, L., Dahal, P., Ariana, P., Gunther, S., & Horby, P. (2023). PLoS Neglected Tropical Diseases, 17(4).
Understanding COVID-19 testing behaviour in England through a sociodemographic lens
Bajaj, S., Chen, S., Creswell, R., Naidoo, R., Tsui, J.-H., Kolade, O., Nicholson, G., Lehmann, B., Hay, J., Kraemer, M., Aguas, R., Donnelly, C., Fowler, T., Hopkins, S., Cantrell, L., Dahal, P., White, L., Stepniewska, K., Voysey, M., … the EY-Oxford Health Analytics Consortium. (2023). In medRxiv.