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Sohail A, Barry A, Auburn S, Cheng Q, Lau CL, Lee R, Price RN, Furuya-Kanamori L, Bareng P, McGuinness SL, Leder K. Imported malaria into Australia: surveillance insights and opportunities. J Travel Med 2024; 31:taad164. [PMID: 38127641 PMCID: PMC10998534 DOI: 10.1093/jtm/taad164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Malaria continues to pose a significant burden in endemic countries, many of which lack access to molecular surveillance. Insights from malaria cases in travellers returning to non-endemic areas can provide valuable data to inform endemic country programmes. To evaluate the potential for novel global insights into malaria, we examined epidemiological and molecular data from imported malaria cases to Australia. METHODS We analysed malaria cases reported in Australia from 2012 to 2022 using National Notifiable Disease Surveillance System data. Molecular data on imported malaria cases were obtained from literature searches. RESULTS Between 2012 and 2022, 3204 malaria cases were reported in Australia. Most cases (69%) were male and 44% occurred in young adults aged 20-39 years. Incidence rates initially declined between 2012 and 2015, then increased until 2019. During 2012-2019, the incidence in travellers ranged from 1.34 to 7.71 per 100 000 trips. Cases were primarily acquired in Sub-Saharan Africa (n = 1433; 45%), Oceania (n = 569; 18%) and Southern and Central Asia (n = 367; 12%). The most common countries of acquisition were Papua New Guinea (n = 474) and India (n = 277). Plasmodium falciparum accounted for 58% (1871/3204) of cases and was predominantly acquired in Sub-Saharan Africa, and Plasmodium vivax accounted for 32% (1016/3204), predominantly from Oceania and Asia. Molecular studies of imported malaria cases to Australia identified genetic mutations and deletions associated with drug resistance and false-negative rapid diagnostic test results, and led to the establishment of reference genomes for P. vivax and Plasmodium malariae. CONCLUSIONS Our analysis highlights the continuing burden of imported malaria into Australia. Molecular studies have offered valuable insights into drug resistance and diagnostic limitations, and established reference genomes. Integrating molecular data into national surveillance systems could provide important infectious disease intelligence to optimize treatment guidelines for returning travellers and support endemic country surveillance programmes.
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Affiliation(s)
- Asma Sohail
- School of Public Health and Preventive Medicine, Monash University, Melbourne 3004, Australia
- Department of Infectious Diseases, Grampians Health, Ballarat 3350, Australia
| | - Alyssa Barry
- Institute for Physical and Mental Health and Clinical Translation (IMPACT) and School of Medicine, Deakin University, Geelong 3220, Australia
- Disease Elimination Program, Burnet Institute, Melbourne 3004, Australia
| | - Sarah Auburn
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin 0800, Australia
| | - Qin Cheng
- Drug Resistance and Diagnostics, Australian Defence Force Malaria and Infectious Disease Institute, Brisbane 4051, Australia
| | - Colleen L Lau
- School of Public Health, Faculty of Medicine, The University of Queensland, Herston 4006, Australia
| | - Rogan Lee
- Parasitology Unit, Institute of Clinical Pathology and Medical Research, Sydney 2145, Australia
| | - Ric N Price
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin 0800, Australia
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX1 2JD, UK
| | - Luis Furuya-Kanamori
- School of Public Health, Faculty of Medicine, The University of Queensland, Herston 4006, Australia
| | - Paolo Bareng
- Institute for Physical and Mental Health and Clinical Translation (IMPACT) and School of Medicine, Deakin University, Geelong 3220, Australia
| | - Sarah L McGuinness
- School of Public Health and Preventive Medicine, Monash University, Melbourne 3004, Australia
- Department of Infectious Diseases, Alfred Health, Melbourne 3004, Australia
| | - Karin Leder
- School of Public Health and Preventive Medicine, Monash University, Melbourne 3004, Australia
- Victorian Infectious Diseases Service, Melbourne Health, Melbourne 3052, Australia
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Picón-Jaimes YA, Lozada-Martinez ID, Orozco-Chinome JE, Molina-Franky J, Acevedo-Lopez D, Acevedo-Lopez N, Bolaño-Romero MP, Visconti-Lopez FJ, Bonilla-Aldana DK, Rodriguez-Morales AJ. Relationship between Duffy Genotype/Phenotype and Prevalence of Plasmodium vivax Infection: A Systematic Review. Trop Med Infect Dis 2023; 8:463. [PMID: 37888591 PMCID: PMC10610806 DOI: 10.3390/tropicalmed8100463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/07/2023] [Accepted: 09/13/2023] [Indexed: 10/28/2023] Open
Abstract
The Duffy protein, a transmembrane molecule, functions as a receptor for various chemokines and facilitates attachment between the reticulocyte and the Plasmodium Duffy antigen-binding protein. Duffy expression correlates with the Duffy receptor gene for the chemokine, located on chromosome 1, and exhibits geographical variability worldwide. Traditionally, researchers have described the Duffy negative genotype as a protective factor against Plasmodium vivax infection. However, recent studies suggest that this microorganism's evolution could potentially diminish this protective effect. Nevertheless, there is currently insufficient global data to demonstrate this phenomenon. This study aimed to evaluate the relationship between the Duffy genotype/phenotype and the prevalence of P. vivax infection. The protocol for the systematic review was registered in PROSPERO as CRD42022353427 and involved reviewing published studies from 2012 to 2022. The Medline/PubMed, Web of Science, Scopus, and SciELO databases were consulted. Assessments of study quality were conducted using the STROBE and GRADE tools. A total of 34 studies were included, with Africa accounting for the majority of recorded studies. The results varied significantly regarding the relationship between the Duffy genotype/phenotype and P. vivax invasion. Some studies predominantly featured the negative Duffy genotype yet reported no malaria cases. Other studies identified minor percentages of infections. Conversely, certain studies observed a higher prevalence (99%) of Duffy-negative individuals infected with P. vivax. In conclusion, this systematic review found that the homozygous Duffy genotype positive for the A allele (FY*A/*A) is associated with a higher incidence of P. vivax infection. Furthermore, the negative Duffy genotype does not confer protection against vivax malaria.
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Affiliation(s)
| | - Ivan David Lozada-Martinez
- Epidemiology Program, Department of Graduate Studies in Health Sciences, Universidad Autónoma de Bucaramanga, Bucaramanga 44005, Colombia;
| | - Javier Esteban Orozco-Chinome
- Medical and Surgical Research Center, Future Surgeons Chapter, Colombian Surgery Association, Bogotá 10002, Colombia; (J.E.O.-C.); (N.A.-L.); (M.P.B.-R.)
| | - Jessica Molina-Franky
- Department of Inmunology and Theranostics, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute of the City of Hope, Duarte, CA 91007, USA;
- Molecular Biology and Inmunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá 10001, Colombia
| | - Domenica Acevedo-Lopez
- School of Medicine, Fundación Universitaria Autónoma de las Américas-Institución Universitaria Visión de las Américas, Pereira 660003, Colombia;
| | - Nicole Acevedo-Lopez
- Medical and Surgical Research Center, Future Surgeons Chapter, Colombian Surgery Association, Bogotá 10002, Colombia; (J.E.O.-C.); (N.A.-L.); (M.P.B.-R.)
| | - Maria Paz Bolaño-Romero
- Medical and Surgical Research Center, Future Surgeons Chapter, Colombian Surgery Association, Bogotá 10002, Colombia; (J.E.O.-C.); (N.A.-L.); (M.P.B.-R.)
| | | | | | - Alfonso J. Rodriguez-Morales
- Clinical Epidemiology and Biostatistics Master Program, Universidad Cientifica del Sur, Lima 15067, Peru;
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut P.O. Box 36, Lebanon
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Ibeji JU, Mwambi H, Iddrisu AK. Bayesian spatio-temporal modelling and mapping of malaria and anaemia among children between 0 and 59 months in Nigeria. Malar J 2022; 21:311. [PMID: 36320061 PMCID: PMC9623970 DOI: 10.1186/s12936-022-04319-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 10/07/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND/M&M A vital aspect of disease management and policy making lies in the understanding of the universal distribution of diseases. Nevertheless, due to differences all-over host groups and space-time outbreak activities, data are subject to intricacies. Herein, Bayesian spatio-temporal models were proposed to model and map malaria and anaemia risk ratio in space and time as well as to ascertain risk factors related to these diseases and the most endemic states in Nigeria. Parameter estimation was performed by employing the R-integrated nested Laplace approximation (INLA) package and Deviance Information Criteria were applied to select the best model. RESULTS In malaria, model 7 which basically suggests that previous trend of an event cannot account for future trend i.e., Interaction with one random time effect (random walk) has the least deviance. On the other hand, model 6 assumes that previous event can be used to predict future event i.e., (Interaction with one random time effect (ar1)) gave the least deviance in anaemia. DISCUSSION For malaria and anaemia, models 7 and 6 were selected to model and map these diseases in Nigeria, because these models have the capacity to receive strength from adjacent states, in a manner that neighbouring states have the same risk. Changes in risk and clustering with a high record of these diseases among states in Nigeria was observed. However, despite these changes, the total risk of malaria and anaemia for 2010 and 2015 was unaffected. CONCLUSION Notwithstanding the methods applied, this study will be valuable to the advancement of a spatio-temporal approach for analyzing malaria and anaemia risk in Nigeria.
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Affiliation(s)
- Jecinta U. Ibeji
- grid.16463.360000 0001 0723 4123School of Mathematics, Statistics and Computer Science, University of KwaZulu Natal, Durban, South Africa
| | - Henry Mwambi
- grid.16463.360000 0001 0723 4123School of Mathematics, Statistics and Computer Science, University of KwaZulu Natal, Durban, South Africa
| | - Abdul-Karim Iddrisu
- grid.449674.c0000 0004 4657 1749School of Science, Mathematics and Statistics, University of Energy and Natural Resources, Sunyani, Ghana
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