1
|
Yan X, Wang X, Li J, Li B, He B, Huang L, Liang J, Xu M, Chen L. Preliminary survey of three mosquito-borne viruses using a self-established multiplex RT-qPCR assay in Chinese blood donors. J Virol Methods 2025; 331:115055. [PMID: 39437970 DOI: 10.1016/j.jviromet.2024.115055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Revised: 10/14/2024] [Accepted: 10/18/2024] [Indexed: 10/25/2024]
Abstract
BACKGROUND Mosquito-borne pathogens pose a significant threat to both human health and blood safety. The primary mosquito-borne viruses that present this threat are Zika virus, Chikungunya virus, and Dengue virus. At present, there are limited efficacious vaccines or therapeutic drugs for the prevention and treatment of these viral infections. Blood donors can remain asymptomatically infected and unfortunately, screening for these three viruses in Chinese blood donors are not mandatory, leaving the residual risk to transfusion recipients uncertain. OBJECTIVE To address this, we developed a single-tube multiplex RT-qPCR assay for ZCD detection and was preliminarily employed to screen a total of 10,566 blood donations in Nanning Blood Center in order to assess the prevalence risk of these pathogens in blood donors. RESULTS None of the blood samples was reactive for ZCD by nucleic acid test (NAT). One out of 173 donations (1/173, 0.58 %) was IgG positive for ZIKV and 14 (14/173, 8.4 %) were IgG positive for DENV. None of these 173 donations was IgG positive for Chikungunya virus. These findings suggest that the prevalence of ZCD infection in blood donors in Nanning is very low although past DENV infection (IgG positive) was relatively common. CONCLUSION A single-tube multiplex RT-qPCR assay for simultaneous detection of ZCD viruses was successfully established and applied for screening in blood donors. The residual risk of ZCD infection through transfusion is currently low in Nanning, China. The NAT assay for ZCD will serve as a technical reserve in response to future epidemic or pandemic of mosquito-borne pathogens.
Collapse
|
2
|
Hossain F, Ghosh P, Chowdhury FR, Basher A, Ahsan HMN, Khan AH, Shumu SJ, Jahan T, Roy CK, Arefin AKMN, Khanam F, Rahat MA, Chowdhury R, Uddin MR, Shomik MS, Maruf S, Rashid MU, Sagar SK, Mithila NT, Chowdhury MAA, Kamal M, Sharfaraz A, Ghosh D, Chowdhury A, Chowdhury AH, Hossain Z, Arefeen F, Islam MS, Rahman SMM, Al-Amin TM, Rashid A, Shukla KK, Roy S, Rana MS, Hossain MS, Siegel M, Wahed AAE, Mondal D. Evaluating a rapid molecular assay in a mobile laboratory for improved diagnosis of dengue in Bangladesh. Int J Infect Dis 2025; 150:107299. [PMID: 39549784 DOI: 10.1016/j.ijid.2024.107299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2024] [Revised: 11/07/2024] [Accepted: 11/07/2024] [Indexed: 11/18/2024] Open
Abstract
OBJECTIVES Dengue emerged as a significant health threat in endemic regions in recent years. However, inconsistent diagnostic accuracy in sequential dengue infections necessitate improved testing methods to ensure effective management of dengue cases. Here, we evaluated a portable, rapid, and sensitive molecular assay-reverse transcriptase recombinase polymerase amplification assay (RT-RAA)-utilizing a mobile suitcase laboratory to detect infections in suspected dengue cases in Bangladesh. METHODS A total of 364 suspected patients with dengue were enrolled in the study. Dengue cases were confirmed by a positive result from any of the four tests: non-structural protein 1 (NS1) rapid diagnostic test (RDT), immunoglobulin (Ig) M RDT, quantitative reverse transcriptive-polymerase chain reaction (RT-PCR), and RT-RAA assay. IgG RDT was performed to differentiate between primary and secondary dengue infections. RESULTS Of 364 suspected cases, 320 were confirmed dengue cases, with 55.94% classified as primary and 44.06% as secondary infections. Laboratory results showed comparable positivity rates between RT-RAA (78.8%) and NS1 RDT (77.1%) in primary dengue, followed by quantitative RT-PCR (57.5%) and IgM RDT (12.8%). RT-RAA demonstrated superior positivity rates in secondary dengue (76.6%), surpassing RT-PCR (60.3%), NS1 RDT (27%), and IgM RDT (24.8%). Combining RT-RAA with NS1 RDT detected infections in 89.95% primary and 81.56% secondary dengue. CONCLUSIONS The findings suggest that complementing RT-RAA with NS1 RDT could significantly improve dengue detection rate, particularly, for secondary infections.
Collapse
|
3
|
van der Ende J, Nipaz V, Carrazco-Montalvo A, Trueba G, Grobusch MP, Coloma J. Cocirculation of 4 Dengue Virus Serotypes, Putumayo Amazon Basin, 2023-2024. Emerg Infect Dis 2025; 31:202-204. [PMID: 39662875 DOI: 10.3201/eid3101.240888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2024] Open
Abstract
Latin America is experiencing an unprecedented dengue outbreak, causing an increased health burden. We document the cocirculation of dengue viruses 1-4 in Putumayo, a remote, underserved region at the border between Ecuador and Colombia. Dengue circulation in this largely unexplored territory represents a threat to public health in Putumayo and neighboring areas.
Collapse
|
4
|
Rotejanaprasert C, Chinpong K, Lawson AB, Maude RJ. Comparative evaluation of spatiotemporal methods for effective dengue cluster detection with a case study of national surveillance data in Thailand. Sci Rep 2024; 14:31064. [PMID: 39730684 DOI: 10.1038/s41598-024-82212-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Accepted: 12/03/2024] [Indexed: 12/29/2024] Open
Abstract
Dengue fever poses a significant public health burden in tropical regions, including Thailand, where periodic epidemics strain healthcare resources. Effective disease surveillance is essential for timely intervention and resource allocation. Various methods exist for spatiotemporal cluster detection, but their comparative performance remains unclear. This study compared spatiotemporal cluster detection methods using simulated and real dengue surveillance data from Thailand. A simulation study explored diverse disease scenarios, characterized by varying magnitudes and spatial-temporal patterns, while real data analysis utilized monthly national dengue surveillance data from 2018 to 2020. Evaluation metrics included accuracy, sensitivity, specificity, positive predictive value, and negative predictive value. Bayesian models and FlexScan emerged as top performers, demonstrating superior accuracy and sensitivity. Traditional methods such as Getis Ord and Moran's I showed poorer performance, while other scanning-based approaches like spatial SaTScan exhibited limitations in positive predictive value and tended to identify large clusters due to the inflexibility of its scanning window shape. Bayesian modeling with a space-time interaction term outperformed testing-based cluster detection methods, emphasizing the importance of incorporating spatiotemporal components. Our study highlights the superior performance of Bayesian models and FlexScan in spatiotemporal cluster detection for dengue surveillance. These findings offer valuable guidance for policymakers and public health authorities in refining disease surveillance strategies and resource allocation. Moreover, the insights gained from this research could be valuable for other diseases sharing similar characteristics and settings, broadening the applicability of our findings beyond dengue surveillance.
Collapse
|
5
|
Qayyum M, Fatima Q, Akgül A, Hassani MK. Modeling and analysis of dengue transmission in fuzzy-fractional framework: a hybrid residual power series approach. Sci Rep 2024; 14:30706. [PMID: 39730443 DOI: 10.1038/s41598-024-79475-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2024] [Accepted: 11/10/2024] [Indexed: 12/29/2024] Open
Abstract
The current manuscript presents a mathematical model of dengue fever transmission with an asymptomatic compartment to capture infection dynamics in the presence of uncertainty. The model is fuzzified using triangular fuzzy numbers (TFNs) approach. The obtained fuzzy-fractional dengue model is then solved and analyzed through fuzzy extension of modified residual power series algorithm, which utilizes residual power series along with Laplace transform. Numerical analysis has also been performed in this study and obtained results are shown as solutions and residual errors for each compartment to ensure the validity. Graphical analysis depict the model's behavior under varying parameters, illustrating contrasting trends for different values of ν and examining the impacts of transmission and recovery rates on dengue model in uncertain environment. The current findings highlighted the effectiveness of proposed uncertainty in epidemic system dynamics, offering new insights with potential applications in other areas of engineering, science and medicine.
Collapse
|
6
|
Islam J, Hu W. Rapid human movement and dengue transmission in Bangladesh: a spatial and temporal analysis based on different policy measures of COVID-19 pandemic and Eid festival. Infect Dis Poverty 2024; 13:99. [PMID: 39722072 DOI: 10.1186/s40249-024-01267-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2024] [Accepted: 11/30/2024] [Indexed: 12/28/2024] Open
Abstract
BACKGROUND Rapid human movement plays a crucial role in the spatial dissemination of the dengue virus. Nevertheless, robust quantification of this relationship using both spatial and temporal models remains necessary. This study aims to explore the spatial and temporal patterns of dengue transmission under various human movement contexts. METHODS We obtained district-wise aggregated dengue incidence data from the Management Information System, Directorate General of Health Services of Bangladesh. The stringency index (SI), along with eight individual policy measures (from the Oxford Coronavirus Government Response Tracker database) and six mobility indices (as measured by Google's Community Mobility Reports) were obtained as human movement indicators. A multi-step correlative modelling approach, including various spatial and temporal models, was utilized to explore the associations of dengue incidence with the SI, fourteen human movement indices and the Eid festival. RESULTS The global Moran's I indicated significant spatial autocorrelation in dengue incidence during the pre-pandemic (Moran's I: 0.14, P < 0.05) and post-pandemic periods (Moran's I: 0.42, P < 0.01), while the pandemic period (2020-2022) showed weaker, non-significant spatial clustering (Moran's I: 0.07, P > 0.05). Following the pandemic, we identified the emergence of new dengue hotspots. We found a strong negative relationship between monthly dengue incidence and the SI (rspearman: - 0.62, P < 0.01). Through the selection of an optimal Seasonal autoregressive integrated moving average model, we observed that the closure of public transport (β = - 1.66, P < 0.10) and restrictions on internal movement (β = - 2.13, P < 0.10) were associated with the reduction of dengue incidence. Additionally, observed cases were substantially lower than predicted cases during the period from 2020 to 2022. By utilising additional time-series models, we were able to identify in 2023 a rise in dengue incidence associated with the Eid festival intervention, even after adjusting for important climate variables. CONCLUSIONS Overall, rapid human movement was found to be associated with increased dengue transmission in Bangladesh. Consequently, the implemention of effective mosquito control interventions prior to large festival periods is necessary for preventing the spread of the disease nationwide. We emphasize the necessity for developing advanced surveillance and monitoring networks to track real-time human movement patterns and dengue incidence.
Collapse
|
7
|
Hassani L, Yari A, Shahabi N, Mohseni S, Shahi M. The evaluation of awareness, attitude, and performance of the residents of Bandar Abbas in relation to preventive behaviors and methods for controlling dengue fever. BMC Res Notes 2024; 17:376. [PMID: 39709455 DOI: 10.1186/s13104-024-07046-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 12/13/2024] [Indexed: 12/23/2024] Open
Abstract
OBJECTIVE Dengue fever is a rapidly spreading viral disease transmitted by mosquitoes, and it is becoming a global concern. This study aimed to assess the awareness, attitude, and performance of the people in Hormozgan province in carrying out preventive behaviors and dengue fever control methods. METHOD This descriptive-analytical study was conducted in 1401 in Bandar Abbas, Iran. A total of 642 men and women participated in the study, and a researcher-made questionnaire was used to collect data on demographic information, awareness, attitude, and performance. The data were analyzed using descriptive statistics. FINDINGS The study included 642 citizens of Bandar Abbas, with the majority being male. The average scores for awareness, attitude, and performance were relatively low, indicating insufficient knowledge and weak preventive behaviors regarding dengue fever. CONCLUSION The findings suggest a need for educational programs to increase awareness and preventive behaviors among the citizens, especially in essential areas such as protected coverage against mosquito bites and inspection of water accumulation sites in homes. It is also important for health centers and mass media to provide more information and education about dengue fever and its prevention.
Collapse
|
8
|
Hempenstall A, Pyke A, Taunton C, Sabatino U, Kaigey S, Pickering E, Ehlers G, Muzari MO, Davis J, Paton C, Taylor C, van den Hurk A, Hewitson G, Schlebusch S, Hanson J. An outbreak of dengue virus type 3 on Mer Island in the Torres Strait, Australia in 2024. COMMUNICABLE DISEASES INTELLIGENCE (2018) 2024; 48. [PMID: 39689909 DOI: 10.33321/cdi.2024.48.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2024]
Abstract
Abstract In early 2024, there were eight confirmed cases of locally acquired dengue on Mer Island in the Torres Strait. This dengue outbreak prompted an in-community public health response which included active case finding, health promotion and vector control. This was the first detected dengue outbreak in the Torres Strait since 2017. It highlights the importance of testing in primary healthcare, vector control and ongoing public health surveillance to minimise the risk of local transmission and establishment of endemic viruses which may cause significant and potentially life-threatening disease within populations in northern Australia.
Collapse
|
9
|
Wang Y, Chong KC, Ren C. Impact of compound warm and wet events on dengue fever infection in South and Southeast Asian countries. ENVIRONMENTAL RESEARCH 2024; 263:120091. [PMID: 39368600 DOI: 10.1016/j.envres.2024.120091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 09/13/2024] [Accepted: 09/29/2024] [Indexed: 10/07/2024]
Abstract
BACKGROUND Multiple studies have reported the profound influence of various climate factors on dengue fever infection, while the effects of joint exposure to warm and wet environment, a condition favouring dengue vectors, on disease transmission were less evaluated. This study aims to investigate the impact of various compound temperature, rainfall, and relative humidity exposures on dengue fever infection in the South and Southeast Asia regions. METHODS Weekly dengue fever surveillance data from 2012 to 2020 were collected from 48 locations in four countries named Singapore (1 location), Sri Lanka (15 locations), Malaysia (9 locations), and Thailand (23 locations, with 11 locations having different study periods). The distributed lag non-linear models were built to assess the impacts of compound temperature, rainfall, and relative humidity exposures on dengue fever infection risks. RESULTS A total of 1,359,993 dengue fever cases were reported with 9.33%, 24.02%, 48.73%, and 17.91% cases contributed by Singapore, Sri Lanka, Malaysia, and Thailand, respectively. Compared to non-warm-non-wet, compound warm-wet was associated with an increased dengue risk (RR:1.32, 95% CI:1.21-1.44). Compared to moderate temperature-humidity, warm-wet environment was also associated with an increase in dengue risk (RR:1.37, 95% CI:1.22-1.55). In comparison to weeks with moderate temperature-rainfall, warm-wet weeks was linked to an elevated dengue risk (RR:1.39, 95% CI:1.27-1.52), whereas cold-dry weather would significantly reduce the infection risk (RR:0.70, 95% CI:0.62-0.80). Modification effects showed that the hot effect on dengue infection was more pronounced under higher humidity, while the impact of rainfall increased with warmer temperature. CONCLUSION Warm-wet events were associated with an increased dengue fever risk, while the infection risk would decline in cold-dry environment, and modification effects exist among exposures. Findings from this study highlight the importance of considering joint temperature, humidity, and rainfall dependency of dengue fever infection in disease prevention and control.
Collapse
|
10
|
Chen VYJ, Yang YC. Geographically weighted regression analysis for nonnegative continuous outcomes: An application to Taiwan dengue data. PLoS One 2024; 19:e0315327. [PMID: 39666638 PMCID: PMC11637361 DOI: 10.1371/journal.pone.0315327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 11/23/2024] [Indexed: 12/14/2024] Open
Abstract
Geographically Weighted Regression (GWR) has gained widespread popularity across various disciplines for investigating spatial heterogeneity with respect to data relationships in georeferenced datasets. However, GWR is typically limited to the analysis of continuous dependent variables, which are assumed to follow a symmetric normal distribution. In many fields, nonnegative continuous data are often observed and may contain substantial amounts of zeros followed by a right-skewed distribution of positive values. When dealing with such type of outcomes, GWR may not provide adequate insights into spatially varying regression relationships. This study intends to extend the GWR based on a compound Poisson distribution. Such an extension not only allows for exploration of relationship heterogeneity but also accommodates nonnegative continuous response variables. We provide a detailed specification of the proposed model and discuss related modeling issues. Through simulation experiments, we assess the performance of this novel approach. Finally, we present an empirical case study using a dataset on dengue fever in Tainan, Taiwan, to demonstrate the practical applicability and utility of our proposed methodology.
Collapse
|
11
|
Rodriguez DM, Madewell ZJ, Torres JM, Rivera A, Wong JM, Santiago GA, Rivera-Amill V, Paz-Bailey G, Marzan-Rodriguez M, Adams LE. Epidemiology of Dengue - Puerto Rico, 2010-2024. MMWR. MORBIDITY AND MORTALITY WEEKLY REPORT 2024; 73:1112-1117. [PMID: 39666586 PMCID: PMC11637419 DOI: 10.15585/mmwr.mm7349a1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2024]
Abstract
Dengue is a mosquitoborne viral illness that can cause acute febrile illness, severe disease, or death. Worldwide, the number of dengue cases is increasing. During the last dengue outbreaks in Puerto Rico throughout 2010-2013, dengue virus (DENV) serotype 1 (DENV-1) predominated, and the largest proportion of cases occurred among adolescents and young adults aged 10-19 years. Dengue case data from January 1, 2010-November 4, 2024, were obtained from the Puerto Rico Department of Health. Bivariate analyses were conducted to evaluate the distribution of cases by patient age, DENV serotype, and hospitalization status during three periods: 2010-2019, 2020-2022, and 2023-2024. During 2023-2024, the median age of dengue cases increased to 26 years (95% CI = 25-27 years) compared with that during 2020-2022 (17 years; 95% CI = 17-18 years) and 2010-2019 (19 years; 95% CI = 19-19 years). After >10 years of DENV-1 predominance, the proportions of DENV serotypes 2 (DENV-2) and 3 (DENV-3) increased significantly during 2023-2024, with DENV-3 replacing DENV-1 as the predominant serotype. In addition, the proportion of dengue patients who were hospitalized increased from 35.7% (2010-2019) to 53.5% (2023-2024). The current dengue outbreak in Puerto Rico marks a shift in serotype predominance to DENV-3 and increasing percentages of cases in older age groups (61.7% in adults aged ≥20 years), although a high proportion of cases still occur among adolescents aged 10-19 years (29.5%). The current dengue outbreak also has a higher rate of hospitalizations than those in previous years. Understanding the changing epidemiology of dengue is crucial to guiding public health strategies for dengue control, including clinical management, surveillance and health care system resilience, and public outreach and education.
Collapse
|
12
|
Branda F, Nakase T, Maruotti A, Scarpa F, Ciccozzi A, Romano C, Peletto S, de Filippis AMB, Alcantara LCJ, Marcello A, Ciccozzi M, Lourenço J, Giovanetti M. Dengue virus transmission in Italy: historical trends up to 2023 and a data repository into the future. Sci Data 2024; 11:1325. [PMID: 39639007 PMCID: PMC11621350 DOI: 10.1038/s41597-024-04162-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 11/22/2024] [Indexed: 12/07/2024] Open
Abstract
Dengue virus circulation is on the rise globally, with increased epidemic activity in previously unaffected countries, including within Europe. In 2023, global dengue activity peaked, and Italy reported the highest number of dengue cases and local chains of transmission to date. By curating several sources of information, we introduce a novel data repository focused on dengue reporting in Italy. We integrate data from such a repository with other geographic, genomic and climatic spatiotemporal data to present an overview of transmission patterns of the past eight years related to circulating viral lineages, geographic distribution, hotspots of reporting, and the theoretical contribution of local climate. The novel data repository can contribute to a better understanding of an evolving epidemiological scenario in Italy, with the potential to inform reassessment and planning of adequate national and European public health strategies to manage the emergence of the dengue virus.
Collapse
|
13
|
Ouédraogo WM, Zanré N, Sombié A, Yameogo F, Gnémé A, Sanon A, Costantini C, Kanuka H, Viana M, Weetman D, McCall PJ, Badolo A. Blood-Feeding Patterns and Resting Behavior of Aedes aegypti from Three Health Districts of Ouagadougou City, Burkina Faso. Am J Trop Med Hyg 2024; 111:1295-1301. [PMID: 39406251 PMCID: PMC11619481 DOI: 10.4269/ajtmh.24-0240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 06/18/2024] [Indexed: 12/06/2024] Open
Abstract
Recent dengue outbreaks have occurred in Ouagadougou and Bobo-Dioulasso, the two major cities of Burkina Faso. Dengue is a viral disease transmitted primarily by Aedes aegypti, a highly anthropophilic mosquito that thrives in human-transformed environments and breeds predominantly in artificial containers. In 2018, we investigated the resting and blood-feeding habits of Ae. aegypti in urban settings of Ouagadougou. In a 3-month cross-sectional study starting in August 2018, indoors and outdoors resting adult mosquitoes were collected using Prokopack aspirators in three health districts (HD). All mosquitoes were morphologically identified, and DNA was extracted from blood-fed Ae. aegypti females. A multiplex polymerase chain reaction with specific primers was used to identify the origin of the blood meal. A total of 4,256 adult Ae. aegypti mosquitoes, including 1,908 females, were collected. A preference for exophily was recorded in Bogodogo and Nongremassom, although an unexpectedly higher proportion of blood-fed females were found indoors than outdoors. Respectively, 96.09%, 91.03%, and 95.54% of the blood meals successfully analyzed in Baskuy, Bogodogo, and Nongremassom were from a single human host, with the remainder from domestic mammals as single or multiple hosts. Modeling total Ae. aegypti and blood-fed female counts showed that among other predictors, human density, outdoor environment, and house type affect their total densities. Our study revealed an exophilic tendency as well as a pronounced anthropophilic preference of Ae. aegypti adults, critical findings to consider when planning accurate entomological surveillance and effective interventions against Ae. aegypti in urban settings.
Collapse
|
14
|
Rahul A, Reegan AD, Shriram AN, Fouque F, Rahi M. Innovative sterile male release strategies for Aedes mosquito control: progress and challenges in integrating evidence of mosquito population suppression with epidemiological impact. Infect Dis Poverty 2024; 13:91. [PMID: 39627857 PMCID: PMC11613880 DOI: 10.1186/s40249-024-01258-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2024] [Accepted: 11/14/2024] [Indexed: 12/06/2024] Open
Abstract
BACKGROUND Aedes mosquitoes pose a significant global threat as vectors for several debilitating arboviruses, including dengue, Zika, yellow fever, and chikungunya. Their unique breeding habits, behavior, and daytime activity complicate control efforts, prompting the search for innovative solutions. The sterile insect technique (SIT) and incompatible insect technique (IIT) are promising new techniques under investigation. This review synthesizes findings from field trials on SIT and/or IIT for Aedes mosquito control. METHODS A scoping review was conducted through comprehensive searches on Scopus, Web of Science, MEDLINE, PubMed, and preprint repositories up to April 25, 2024. Studies were initially screened for relevance based on their titles and abstracts, followed by a full-text review conducted by two independent extractors. Only field trials with control groups were included, with the final assessment focusing on trials reporting epidemiological outcomes. Data were abstracted into templates, emphasizing study design, intervention details, and outcomes. The review adhered to the PRISMA-ScR guidelines. RESULTS The search identified 21 field trials in various countries against Aedes mosquitoes. These trials employed diverse methodologies and mosquito release strategies, achieving varying levels of mosquito population suppression. Notably, two SIT and two Wolbachia-based IIT trials reported epidemiological outcomes, including reductions in dengue incidence and associated risk ratios. However, the reliance on national surveillance data for assessing dengue incidence suggests caution due to the potential underreporting of subclinical cases. CONCLUSIONS The review underscores the promise of SIT and IIT for controlling Aedes mosquito populations, citing successful reductions in mosquito densities and dengue transmission. However, it calls for more rigorous study designs and standardized methodologies, as well as the adoption of comprehensive frameworks to accurately assess the effectiveness of these interventions. Future research should focus on bridging gaps in real-world effectiveness by addressing factors such as feasibility, acceptability, scalability, and cost, which are crucial for guiding their successful large-scale deployment in any country.
Collapse
|
15
|
Bonney JHK, Pratt D, Ofori M, Hayashi T, Abankwa A, Awuku-Larbi Y, Kumordjie S, Agbodzi B, Salisu M, Mante AAO, Bour S, Eshun M, Amaning JNDA, Ketorwoley P, Enimil N, Koomson J, Stephens G, Asiedu-Bekoe F, Laryea D, Dadzie S, Suzuki T. Molecular detection of dengue virus from febrile patients in Ghana. BMC Infect Dis 2024; 24:1382. [PMID: 39627698 PMCID: PMC11616235 DOI: 10.1186/s12879-024-10289-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Accepted: 11/28/2024] [Indexed: 12/06/2024] Open
Abstract
BACKGROUND Viral hemorrhagic fevers (VHFs) belong to a group of viral infectious diseases that interfere with the blood's clotting mechanism. VHF has a wide host range, including bats, rodents, or arthropods such as mosquitoes and ticks. Most VHFs emerge suddenly as outbreaks, making it difficult to predict occurrence. To be responsive to such outbreaks, the Noguchi Memorial Institute for Medical Research (NMIMR) provides high-end molecular and genomic diagnostics capability for surveillance of suspected VHFs in samples collected from health facilities across the country. METHODS Between January 2022 and December 2023, cross-sectional surveillance for viruses was conducted in patients with suspected VHF. During the period, 2586 serum or plasma samples were collected and transported under a cold chain to the NMIMR for testing. The samples were analyzed for potential VHF viruses including yellow fever, Ebola/Marburg, Lassa fever, and Dengue viruses using Real-Time Polymerase Chain Reaction Assay. Dengue positives were serotyped using the protocol of Johnson W.B et al.,2005. Whole genome sequencing was conducted using Illumina Next Generation Sequencing Technology. Using IQ-TREE, a maximum likelihood phylogenetic analysis was carried out. RESULTS Dengue virus (DENV) was detected in eight patient samples that subtyped to serotypes 1, 2, and 3. All dengue fever cases were resident in the Greater Accra region. The detection of serotype one increases the possibility of multiple infections in individuals and may have a worse or increased risk of severe dengue fever. Phylogenetic analysis revealed that the DENV-1 strain shared similarities to circulating strains in West Africa. CONCLUSION Until the emergence of recent cases, the circulating subtype has been serotyped as Dengue one. There is therefore the need to intensify surveillance and also to control the mosquito vectors which can transmit these DENV in Ghana.
Collapse
|
16
|
Percio J, Kobayashi CD, Silva RMA, Marinho AKBB, Capovilla L, Andrade PHS, da Nóbrega MEB, Cabral CM, de Moraes MB, Werneck GL, Fernandes EG. Safety signal detected: Anaphylaxis after attenuated dengue vaccine (TAK-003) - Brazil, march 1, 2023-march 11, 2024. Vaccine 2024; 42:126407. [PMID: 39368126 DOI: 10.1016/j.vaccine.2024.126407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 09/20/2024] [Accepted: 09/26/2024] [Indexed: 10/07/2024]
Abstract
The aim was to describe cases of anaphylaxis following the Attenuated Dengue Vaccine (TAK-003) in Brazil, from March 1, 2023, to March 11, 2024. A descriptive study of anaphylaxis cases following TAK-003 was conducted, as reported in the National System of Surveillance of Adverse Events Following Immunization (AEFI). Percentages and notification rates of AEFI per million doses administered (DA) were calculated. In total, 380,358 doses of TAK-003 were administered, and 626 AEFI were reported. Of these, 85 were cases of immediate hypersensitivity, with 24 (63.1 cases per million) being anaphylaxis, including three anaphylactic shock. For 10 (41.7 %) cases, reactions began within 15 min after vaccination. No deaths related to anaphylaxis were reported. In light of the safety signal identification (increased frequency of anaphylaxis post-dengue vaccination), the Ministry of Health of Brazil published recommendations for intensifying actions for safe vaccination, including healthcare professional training and post-vaccination observation.
Collapse
|
17
|
Islam MT, Kamal ASMM, Islam MM, Hossain S. Impact of climate change on dengue incidence in Singapore: time-series seasonal analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024; 34:3988-3998. [PMID: 38627938 DOI: 10.1080/09603123.2024.2337827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/28/2024] [Indexed: 11/20/2024]
Abstract
This study aimed to identify the meteorological factors that contribute to dengue epidemics. The monthly incidence of dengue was used as the outcome variable, while maximum temperature, humidity, precipitation, and sunshine hours were used as independent variables. The results showed a consistent increase in monthly dengue cases from 2013 to 2021, with seasonal patterns observed in stationary time-series data. The ARIMA (2, 1, 3) × seasonal (0, 1, 2)12 model was used based on its lowest Akaike Information Criterion (AIC) values. The analysis revealed that a 1-unit increase in rainfall was positively correlated with a small 0.062-unit increase in dengue cases, whereas a 1-unit increase in humidity was negatively associated, leading to a substantial reduction of approximately 16.34 cases. This study highlights the importance of incorporating weather data into national dengue prevention programs to enhance public awareness and to promote recommended safety measures.
Collapse
|
18
|
Ul-Rahman A, Shabbir MZ, Rasheed M, Shafi N, AbdulRazaq K, Ramzan H, Mehmood R, Khan JA. Comparative genomics and evolutionary analysis of dengue virus strains circulating in Pakistan. Virus Genes 2024; 60:603-620. [PMID: 39198368 DOI: 10.1007/s11262-024-02100-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/09/2024] [Indexed: 09/01/2024]
Abstract
Dengue fever virus (DENV) poses a significant public health risk in tropical and subtropical regions across the world. Although the dengue fever virus (DENV) exhibits significant genetic diversity and has the potential to evolve, there is a lack of comprehensive research on the comparative genomics and evolutionary dynamics of the virus in Pakistan. Phylogenetic analysis demonstrated the circulation of all four dengue virus serotypes (DENV-1, - 2, - 3, and - 4) with prevalent genotypes III and V within DENV-1, cosmopolitan genotype within DENV-2, genotype III within DENV-3, and genotype I within DENV-4 during 2006-2014. Based on the complete envelope region, genome-wide residue signature and genetic diversity indicate that there is a high level of genetic diversity among DENV-1 strains, while DENV-3 strains exhibit the least genetic diversity. Comparative analysis of all four DENV serotypes revealed that certain codons in DENV-2 and -4 were subject to strong purifying selection, while a few codon sites in the envelope region showed evidence of positive selection. These findings provided valuable insights into the comparative genomics and evolutionary pattern of DENV strains reported from Pakistan. Whether those characteristics conferred a fitness advantage to DENV-1 genotypes within a specific geography and time interval warrants further investigations. The findings of the current study will contribute to tracking disease dynamics, understanding virus transmission and evolution, and formulating effective disease control strategies.
Collapse
|
19
|
Wu BQ, Kuo HT, Hsu AY, Lin CJ, Tien PT, Hsia NY, Cheng YD, Hsieh YW, Huang YH, Wang ST, Lai CT, Shao YC, Chiang CC, Tseng H, Chen HS, Tsai YY. Risk of Uveitis in Dengue Fever Patients: A Population-Based Cohort Study in Taiwan. J Med Virol 2024; 96:e70141. [PMID: 39707739 DOI: 10.1002/jmv.70141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2024] [Revised: 11/05/2024] [Accepted: 12/11/2024] [Indexed: 12/23/2024]
Abstract
Dengue-related ocular complications were considered rare, but recent evidence points to a broader spectrum of manifestations, including uveitis. This study utilized the Taiwan National Health Insurance Research Database (NHIRD) to investigate the incidence of uveitis in dengue patients, aiming to fill this research gap. This population-based, retrospective cohort study utilized the Taiwan National Health Insurance Research Database (NHIRD) and included patients with and without Dengue fever. The non-Dengue fever cohort comprised randomly selected control patients who were matched. Hazard ratios and Kaplan-Meier analysis were conducted to compare the incidence of uveitis in the Dengue and non-Dengue cohorts. Subgroup analyses were carried out based on age groups, genders, and comorbidities. A total of 26 950 patients diagnosed with Dengue fever were included in the study (49.6% female, mean age at index 41.63 years). Based on a 1:4 matching ratio, 107 800 control subjects without uveitis (50.03% female, mean age at index 41.41 years) were also included. The adjusted hazard ratio (aHR) of uveitis was higher in the Dengue fever group than in the non-Dengue fever group (aHR = 1.38, p < 0.001). A history of stroke or transient ischemic attack (TIA) was not associated with uveitis. Stratified analyses revealed that patients with Dengue fever had an increased risk regardless of their sex and age. The Kaplan-Meier method with the log-rank test showed a significantly higher cumulative incidence of uveitis in the Dengue fever cohort than in the non-Dengue fever cohort (p < 0.001). In the subgroup analysis for most major comorbidities, the significantly higher risk for uveitis in those patients with Dengue fever, was only demonstrated in the subgroups of those without these major comorbidities. Our findings showed Dengue infection to be associated with increased risk for uveitis. Clinicians should be attentive to a history of stroke or TIA in patients with Dengue fever.
Collapse
|
20
|
Mekonnen F, Khan BA, Nibret E, Munshea A, Tsega D, Endalamaw D, Tadesse S, Yismaw G, Lankir D, Ali J, Ulinici M, Orsini E, Šušnjar U, Carletti T, Licastro D, Bitew M, Giovanetti M, Marcello A. Introduction of dengue virus serotype 3 in the Afar Region, Ethiopia. Emerg Microbes Infect 2024; 13:2429653. [PMID: 39552533 PMCID: PMC11610227 DOI: 10.1080/22221751.2024.2429653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Revised: 09/25/2024] [Accepted: 11/10/2024] [Indexed: 11/19/2024]
Abstract
The genetic analysis of the Dengue virus circulating in Ethiopia's Afar region, in 2023, identified three distinct introductions with spatiotemporal clustering linked to genomes from Asia and Italy. These findings are crucial for enhancing prevention and control strategies, reinforcing the necessity to provide sustainable tools for genomic epidemiology in Africa.
Collapse
|
21
|
Al-Manji A, Wirayuda AAB, Al Wahaibi A, Al-Azri M, Chan MF. Investigating the Determinants of Dengue Outbreak in Oman: A Study in Seeb. J Epidemiol Glob Health 2024; 14:1464-1475. [PMID: 39495476 DOI: 10.1007/s44197-024-00324-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2024] [Accepted: 10/28/2024] [Indexed: 11/05/2024] Open
Abstract
OBJECTIVE This study investigates the key factors contributing to the dengue outbreak in Oman. METHODS Data on climate (e.g., temperature, humidity, wind pace), population traits (e.g., populace density), and vector dynamics (e.g., mosquito density) within the Seeb district of Oman from 2022 to 2023 were gathered. The partial least squares structural equation modeling (PLS-SEM) was performed to study which variables affect dengue outbreaks. RESULTS The results indicate that climatic factors significantly affect the dengue vector (β = -0.361, p < 0.001) but do not directly impact the dengue outbreak. Population characteristics, however, have a more substantial impact on dengue transmission, with a total effect (β = 0.231, p = 0.002) being relatively higher than that of the vector itself (total effect: β = 0.116, p < 0.001). CONCLUSIONS Even with ongoing vector intervention efforts, the study underscores the need to include innovative public health interventions when considering environmental and demographic factors. More advantageous surveillance and focused interventions in excessive-threat regions are essential to mitigate the effect of dengue in Oman.
Collapse
|
22
|
Rodríguez-Morales AJ, López-Medina E, Arboleda I, Cardona-Ospina JA, Castellanos J, Faccini-Martínez ÁA, Gallagher E, Hanley R, López P, Mattar S, Pérez CE, Kastner R, Reynales H, Rosso F, Shen J, Villamil-Gómez WE, Fuquen M. Cost of dengue in Colombia: A systematic review. PLoS Negl Trop Dis 2024; 18:e0012718. [PMID: 39666757 DOI: 10.1371/journal.pntd.0012718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 12/26/2024] [Accepted: 11/22/2024] [Indexed: 12/14/2024] Open
Abstract
BACKGROUND Dengue is hyperendemic in Colombia. It imposes a substantial economic burden on patients, caregivers, society, and the national health system. We intend to identify and synthesize the evidence regarding the economic burden of dengue in Colombia. METHODS A systematic review (PROSPERO CRD42021257985) of economic studies was performed. A comprehensive search was completed in PubMed, EMBASE, the Cochrane Library, the LILACS, and SciELO databases. Study selection and data extraction was made by two researchers. RESULTS 160 records were identified. Of these, 14 studies were selected for data extraction. Direct medical cost of dengue is mainly represented by hospitalization (USD 823 to 1,754). The annual aggregated cost is near to USD 159.6 million, with ambulatory care (USD 90.1 million) and fatal cases (USD 30.7 million) representing 75% of the total cost. The aggregate indirect cost (due to loss in income while sick or as a caretaker) was USD 92.8 million. Vaccination seems to reduce the economic cost of dengue. CONCLUSIONS Dengue financial burden could be challenging for low-income communities as those affected in Colombia. An integrated approach including vector control and the introduction of a vaccine for dengue has the potential to reduce the economic burden of the disease.
Collapse
|
23
|
Yazdani M, Amiri Sabouri S, Anvari M, Raesi R. 25th National and 11th International Annual Congress on Research and Technology of Iranian Medical Sciences Students, Urmia, Iran, 5-7 September, 2024. IRANIAN BIOMEDICAL JOURNAL 2024; 28:58. [PMID: 39654331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/22/2024]
|
24
|
Fleischmann WA, Cao LC, Nurjadi D, Velavan TP. Addressing the rise of autochthonous vector-borne diseases in a warming Europe. Int J Infect Dis 2024; 149:107275. [PMID: 39427704 DOI: 10.1016/j.ijid.2024.107275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2024] [Revised: 10/09/2024] [Accepted: 10/16/2024] [Indexed: 10/22/2024] Open
Abstract
The perspective explores the emergence of autochthonous tropical diseases in Europe, driven by climate change and the associated increase in vector-borne diseases. Rising temperatures, along with changes in humidity and rainfall patterns, have altered the activity, distribution, and diversity of vectors such as mosquitoes and ticks. Species like Aedes albopictus and Aedes aegypti, which are primary vectors of dengue, have established self-sustaining populations across Europe. This spread has led to a surge in cases of dengue fever, West Nile virus, and tick-borne encephalitis in temperate regions. The complexity of predicting these outbreaks is compounded by factors like vector diapause, serological cross-reactivity, and land-use changes. The perspective calls for the implementation of enhanced surveillance, weather-linked predictive models, and robust vector control strategies to mitigate the public health risks posed by the spread of these diseases. As climate change accelerates, Europe faces increasing health threats previously confined to tropical regions, emphasizing the need for proactive public health measures to protect populations from this growing threat.
Collapse
|
25
|
Mills C, Donnelly CA. Climate-based modelling and forecasting of dengue in three endemic departments of Peru. PLoS Negl Trop Dis 2024; 18:e0012596. [PMID: 39630856 DOI: 10.1371/journal.pntd.0012596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/16/2024] [Accepted: 10/02/2024] [Indexed: 12/07/2024] Open
Abstract
Amid profound climate change, incidence of dengue continues to rise and expand in distribution across the world. Here, we analysed dengue in three coastal departments of Peru which have recently experienced public health emergencies during the worst dengue crises in Latin American history. We developed a climate-based spatiotemporal modelling framework to model monthly incidence of new dengue cases in Piura, Tumbes, and Lambayeque over 140 months from 2010 to 2021. The framework enabled accurate description of in-sample and out-of-sample dengue incidence trends across the departments, as well as the characterisation of the timing, structure, and intensity of climatic relationships with human dengue incidence. In terms of dengue incidence rate (DIR) risk factors, we inferred non-linear and delayed effects of greater monthly mean maximum temperatures, extreme precipitation, sustained drought conditions, and extremes of a Peruvian-specific indicator of the El Niño Southern Oscillation. Building on our model-based understanding of climatic influences, we performed climate-model-based forecasting of dengue incidence across 2018 to 2021 with a forecast horizon of one month. Our framework enabled representative, reliable forecasts of future dengue outbreaks, including correct classification of 100% of all future outbreaks with DIR ≥ 50 (or 150) per 100,000, whilst retaining relatively low probability of 0.12 (0.05) for false alarms. Therefore, our model framework and analysis may be used by public health authorities to i) understand climatic drivers of dengue incidence, and ii) alongside our forecasts, to mitigate impacts of dengue outbreaks and potential public health emergencies by informing early warning systems and deployment of vector control resources.
Collapse
|