Malaria Journal最新文献

{"title":"Alteration of ceruloplasmin in patients with malaria: a systematic review and meta-analysis of observational studies.","authors":"Kwuntida Uthaisar Kotepui, Aongart Mahittikorn, Polrat Wilairatana, Frederick Ramirez Masangkay, Manas Kotepui","doi":"10.1186/s12936-024-05156-x","DOIUrl":"10.1186/s12936-024-05156-x","url":null,"abstract":"<p><strong>Background: </strong>The evidences of oxidative stress-related Plasmodium infection may alter the ceruloplasmin levels were inconsistent. This systematic review and meta-analysis aimed to collate and synthesize literatures on malaria and ceruloplasmin concentrations.</p><p><strong>Methods: </strong>The systematic review has been registered with PROSPERO (CRD42023454859). Six electronic databases were systematically searched for investigated ceruloplasmin levels in malaria: ProQuest, EMBASE, MEDLINE, Ovid, PubMed, and Scopus, from their inception to August 2023. The quality of the included studies was assessed using the Joanna Briggs Institute (JBI) critical appraisal tools for cross-sectional, cohort, and case-control studies. Qualitative synthesis was undertaken to summarize findings from the included studies. For quantitative synthesis, a meta-analysis was performed using random-effects models.</p><p><strong>Results: </strong>A total of 411 articles were retrieved, and nine studies were included in the review. The majority of included studies found significantly increased ceruloplasmin levels in malaria patients compared to uninfected controls. The meta-analysis showed a significant increase of ceruloplasmin in patients with malaria as compared to uninfected controls (P < 0.01, Hedge's g 1.18, 95% CI 0.90-1.47, I² 59.19%, eight studies).</p><p><strong>Conclusion: </strong>The systematic review and meta-analysis consistently revealed a significant rise in ceruloplasmin levels among malaria patients. Further research is essential to understand the variations in ceruloplasmin levels between different Plasmodium species and the severity of malaria in patients.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"353"},"PeriodicalIF":2.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11580669/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142687355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: An observational analysis of the impact of deltamethrin + piperonyl butoxide insecticide-treated nets on malaria case incidence and entomological indicators in Ebonyi State, Nigeria, 2017-2021.","authors":"Kelly M Davis, Okefu O Okoko, Adedayo O Oduola, Petrus U Inyama, Chigozi J Uneke, Kelley Ambrose, Aklilu Seyoum, Perpetua Uhomoibhi, Dale A Rhoda, Caitlin B Clary, Justin Millar, Megan Littrell, John H Rogers, Melissa Yoshimizu, Uwem Inyang, Mark Maire, Sarah M Burnett","doi":"10.1186/s12936-024-05168-7","DOIUrl":"10.1186/s12936-024-05168-7","url":null,"abstract":"","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"349"},"PeriodicalIF":2.4,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11577749/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Post-release monitoring pathway for the deployment of gene drive-modified mosquitoes for malaria control in Africa.","authors":"Dorington O Ogoyi, Julia Njagi, Willy Tonui, Brinda Dass, Hector Quemada, Stephanie James","doi":"10.1186/s12936-024-05179-4","DOIUrl":"10.1186/s12936-024-05179-4","url":null,"abstract":"<p><strong>Background: </strong>Gene drive-modified mosquitoes (GDMMs) have been promoted as one of the innovative technologies that may control and eliminate malaria and other mosquito-borne diseases. Several products are in early stages of development, targeting either population suppression or population modification of the mosquito vector. However, there is no direct experience of conducting risk assessment for environmental releases and subsequent policies regarding conditions for post-release. This study was carried out to gain additional insights on the possible post-release concerns that may arise, as they may inform future risk assessment and planning for deployment.</p><p><strong>Methods: </strong>This study involved desktop reviews on post release monitoring experiences with previously released biological control products. Stakeholder consultations involving online surveys, and face to face workshop with experts from selected African countries from Eastern, Western, and Southern African regions was then carried out to establish post-release monitoring concerns for GDMMs.</p><p><strong>Results: </strong>Review of genetic biocontrol technologies showed only limited lessons from post-release monitoring regimes with a focus largely limited to efficacy. For genetically modified organisms general surveillance and case-specific monitoring is expected in some of the regions. A number of post-release monitoring concerns in relation to the protection goals of human and animal health, biodiversity, and water quality were identified.</p><p><strong>Conclusion: </strong>Based on established- protection goals, several post-release monitoring concerns have been identified. Subject to a rigorous risk assessment process for future GDMMs products, the concerns may then be prioritized for post-release monitoring.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"351"},"PeriodicalIF":2.4,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11580452/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A survey of malaria vectors feeding preference, biting site and resting behaviour in the malaria elimination settings of Dembiya District, north-western Ethiopia.","authors":"Mihretu Tarekegn, Sisay Dugassa, Yohannes Negash, Habte Tekie, Yitbarek Woldehawariat","doi":"10.1186/s12936-024-05148-x","DOIUrl":"10.1186/s12936-024-05148-x","url":null,"abstract":"<p><strong>Background: </strong>Despite the progress in scaling vector control interventions in Ethiopia, malaria is still a major health problem in the country. Monitoring of the local vector populations and the effectiveness of vector control strategies is necessary to guide programme decisions to optimize malaria prevention efforts. This study investigated the feeding preference, the biting behaviour and resting behaviours of Anopheles mosquitoes in selected localities of Dembiya District.</p><p><strong>Methods: </strong>Adult Anopheles mosquitoes were sampled indoors and outdoors from June 2018 to May 2019 using CDC light traps, pyrethrum spray catches, artificial pit shelters, and mouth aspirators at both Guramba Bata and Arebiya study sites. Anopheles mosquitoes were identified to the species level. Their blood meal source and Plasmodium sporozoite infections were determined using an enzyme-linked immunosorbent assay.</p><p><strong>Results: </strong>Anopheles mosquitoes belonging to 11 species were identified from 2,055 collected mosquito specimens. Anopheles pharoensis was the predominant species at both the Guramba Bata (46.5%) and Arebiya (46.2%) study sites. The CDC light traps caught the highest number of Anopheles mosquitoes in both study sites. In Guramba Bata the density of outdoor host-seeking and resting Anopheles mosquitoes were higher than indoors (P ≤ 0.05). The human blood indexes (HBI) of indoor and outdoor host-seeking Anopheles arabiensis were 17.4% and 15.3%, respectively. The entomological inoculation rate (EIR) of outdoor host-seeking An. arabiensis was 4.7 infective bites/person/year. Additionally, the outdoor EIR of host-seeking Anopheles coustani was 25.7ib/p/year.</p><p><strong>Conclusions: </strong>Anopheles mosquitoes in Dembiya district were more likely to seek a host and rest outdoors than indoors. A reevaluation of vector control strategies is needed to ensure Ethiopia remains on the path to malaria elimination. The detection of Plasmodium circumsporozoite protein in potential secondary vectors, such as An. coustani requires further investigation to substantiate their role in malaria transmission.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"352"},"PeriodicalIF":2.4,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11580510/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"What happens to old insecticide-treated nets after households use in Burkina Faso?","authors":"Aristide S Hien, Hervé Hien, Fidèle Y Bacyè, Herman Badolo, Alfred Tiono, Cheick O Diallo, Serge M A Somda, Herman Bazié, Matilibou Guira, Nicolas Meda","doi":"10.1186/s12936-024-05181-w","DOIUrl":"10.1186/s12936-024-05181-w","url":null,"abstract":"<p><strong>Background: </strong>Insecticide-treated nets (ITNs) are the most commonly deployed tools for controlling malaria transmission in sub-Saharan Africa. However, some reports associate multiple alternative uses of nets with poor disposal practices, prompting this study to assess existing alternative uses and disposal practices of old ITNs in Burkina Faso after four universal distribution campaigns.</p><p><strong>Methods: </strong>A quantitative survey combined with qualitative data collection was used to describe existing alternative uses and disposal practices for old ITNs in households from selected study sites in the three climatic zones of Burkina Faso. A survey questionnaire was distributed to 3,780 participants, and 12 focus groups were held to elucidate responses regarding existing disposal practices and alternative uses of ITNs.</p><p><strong>Results: </strong>Of the 3780 households surveyed, 87.4% (3,330) reported having disposed of their ITNs when they were no longer usable due to age or wear. The most commonly cited disposal methods included alternative uses (67.4%), disposal with other garbage (61.4%), and burying (9%). In addition, the most common alternative uses included fencing for crops and seedlings (51.8%); ropes for tying items (40.4%); animal protection fencing (17.8%); house fencing (16.8%); bed covers (13.3%) and curtains for doors or windows (12.6%). Furthermore, trends in ITNs disposal mechanisms and alternative uses differed between study sites in each climate zone. All these ITNs disposal mechanisms and the different types of alternative use of old ITNs were confirmed in the focus group discussions.</p><p><strong>Conclusion: </strong>The findings underscore the need for comprehensive strategies to manage the disposal and repurposing of old ITNs in Burkina Faso. Addressing gaps in disposal guidelines, promoting safe and beneficial reuse practices, and actively involving communities in the decision-making process can help mitigate health risks associated with the improper disposal and repurposing of old insecticide-treated nets and improve the overall effectiveness of malaria control programmes. Through these efforts, both public health and environmental concerns can be addressed in a sustainable and collaborative manner.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"350"},"PeriodicalIF":2.4,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11577945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors associated with malaria in pregnancy among antenatal care mothers at Gulu Regional Referral Hospital in northern Uganda.","authors":"Solomon Oguta, Brian Serumaga, Lameck Odongo, Donald Otika, Jackline Ayikoru, Raymond Otim, Jimmyy Opee, Baifa Arwinyo, Francis Pebolo Pebalo, Vincentina Achora, Sande Ojara, Benard Abola, Silvia Awor","doi":"10.1186/s12936-024-05184-7","DOIUrl":"10.1186/s12936-024-05184-7","url":null,"abstract":"<p><strong>Background: </strong>All pregnant mothers in Uganda are given sulfadoxine-pyrimethamine (SP, Fansidar^®) for presumptive treatment of malaria in pregnancy from 14 weeks of gestation, every four weeks, until delivery. However, prenatal mothers still fall sick of malaria. This study aimed to assess the factors associated with malaria in pregnancy among antenatal care mothers at Gulu Regional Referral Hospital.</p><p><strong>Methods: </strong>This was a cross-sectional study at Gulu Regional Referral Hospital antenatal clinic from July to August 2023. Consecutive sampling was used. An interviewer-administered questionnaire was used to collect sociodemographic characteristics, physical examination findings and blood samples taken for rapid diagnostic test (RDT) for malaria. A positive RDT was taken as the presence of malaria infection in pregnancy. Data was pre-processed in STATA^®15, and logistic regression analysis was done in RStudio 4.2.2. Variables with p < 0.05 were taken as independently associated with malaria in pregnancy and reported as adjusted risk ratios (aRR).</p><p><strong>Results: </strong>Three hundred fifty (350) pregnant women were recruited; 96% of them slept under mosquito nets daily, while more than half of them (51.7%) had not yet taken SP (IPTp) during their current pregnancy. Prevalence of anaemia (Hb < 11.0 g/dl) was 46.0%. Twenty-four per cent of the mothers were in the first trimester, 56.3% in the second and 19.7% in the third. The prevalence of malaria in pregnancy was 39.7% (95% CI 34.5-45.1%), equally distributed throughout the trimesters. Anaemia (aRR = 4.99, 95%CI 3.10-8.05, p < 0.001) and tertiary level of education (aRR = 0.29, 95% CI 0.14-0.62, p = 0.001) were significantly associated with malaria in pregnancy. Not sleeping under a mosquito net (aRR = 3.79, 95% CI 0.95-15.16, p = 0.059) may be a factor associated with malaria in pregnancy.</p><p><strong>Conclusion: </strong>Four in every ten mothers had malaria infection, with anaemia being a risk factor, while a tertiary level of education was protective against malaria in pregnancy.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"346"},"PeriodicalIF":2.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11575075/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Malaria, relationship with climatic variables and deforestation in Colombia, Latin America and the Caribbean from 2000 to 2020: a systematic review.","authors":"Carol B Colonia, Ana B Vásquez-Rodríguez, Neal Alexander, Fernando de la Hoz Restrepo","doi":"10.1186/s12936-024-05140-5","DOIUrl":"10.1186/s12936-024-05140-5","url":null,"abstract":"<p><strong>Background: </strong>This systematic review investigates the relationship between malaria incidence, climate variables, and deforestation in Colombia, Latin America, and the Caribbean from 2000 to 2020. Malaria, a significant public health issue in these regions, is influenced by ecological factors including climatic conditions and environmental changes, such as deforestation.</p><p><strong>Methods: </strong>The review employs a comprehensive search strategy across PubMed, Web of Science, Embase, Scopus, Cochrane, and Scielo databases. It applies strict inclusion and exclusion criteria to ensure the relevance and quality of selected studies, focusing on analysing the relationship between climate variables, deforestation, and malaria incidence.</p><p><strong>Results: </strong>Twenty-four articles were included in this review, fourteen of which assessed the relationship between climatic variables and malaria and ten between deforestation and malaria. The analysis reveals a nuanced understanding of malaria dynamics. A significant finding is the seasonal effect of climatic variables on malaria incidence. The study notes that increased rainfall is positively correlated with malaria incidence. Similarly, warmer temperatures are associated with increased malaria risks, and malaria rates can change by 10% to 80% for every degree of temperature increase, after adjusting for altitude. The impact of deforestation on malaria is complex, with positive and negative correlations observed, depending on the remaining forest cover.</p><p><strong>Conclusions: </strong>The review highlights the multifaceted nature of malaria transmission, emphasizing the need for integrated approaches that consider both environmental and health perspectives. It underscores the importance of understanding the complex relationships between malaria incidence, climate variables, and deforestation.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"347"},"PeriodicalIF":2.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11575017/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chloroquine-primaquine therapeutic response and safety in patients with uncomplicated Plasmodium vivax malaria in the Colombian Amazon region.","authors":"Paula Calderón-Ruiz, Gabriel Velez-Tobón, Sebastian Bolívar-Hernández, Luz Mila Murcia-Montaño, Alberto Tobón-Castaño","doi":"10.1186/s12936-024-05170-z","DOIUrl":"10.1186/s12936-024-05170-z","url":null,"abstract":"<p><strong>Background: </strong>In Colombia, published studies on the treatment of uncomplicated Plasmodium vivax malaria with chloroquine-primaquine are scarce. The aim of this study was to evaluate the therapeutic response to two treatment regimens at the 28-day follow-up and the occurrence of adverse events in patients with P. vivax malaria.</p><p><strong>Methods: </strong>A quasi-experimental clinical trial was conducted at 3 sites in the Department of Amazonas. Patients received supervised or unsupervised anti-malarial treatment (chloroquine plus primaquine), and the primary effectiveness endpoint was the clinical and parasitological response. Safety was assessed through adverse event surveillance.</p><p><strong>Results: </strong>A total of 103 patients were included: 53 in the 7-day primaquine group (Group I) and 50 in the group receiving primaquine for 14 days (Group II). Among the patients in group I, an adequate treatment response of 100% and 89.5% was found in patients who received supervised and unsupervised treatment, respectively. In Group II, adequate responses of 100% and 95% were reported for patients who received supervised and unsupervised treatment, respectively. No adverse events were detected.</p><p><strong>Conclusions: </strong>The response to combined treatment with chloroquine plus primaquine continues to be adequate for treating P. vivax malaria in the Colombian Amazon region; however, a response to unsupervised treatment in the region is recommended.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"348"},"PeriodicalIF":2.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11575219/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kidney involvement in Plasmodium falciparum infection in a pregnant patient.","authors":"Octavio René García-Flores, Mayra Eugenia Avilés-Ramírez, Sabrina Vianey Castillo-Paniagua, Edgar Misael Pérez-Jiménez, José Carlos Gasca-Aldama, María Virgilia Soto-Abraham, Juan Carlos Bravata-Alcántara, Juan Manuel Bello-López, Giorgina Barbara Piccoli, Enzo Vásquez-Jiménez","doi":"10.1186/s12936-024-05182-9","DOIUrl":"10.1186/s12936-024-05182-9","url":null,"abstract":"<p><strong>Background: </strong>The course of kidney function and outcomes of severe malaria infection in pregnant women is poorly understood. The indications for renal replacement therapy in pregnant patients with AKI are similar to the general population. This is the case of a pregnant patient with severe Plasmodium falciparum infection that caused cerebral malaria, acute kidney injury (AKI) who required renal replacement therapy and kidney biopsy during her hospitalization.</p><p><strong>Case presentation: </strong>A 29-year-old pregnant woman from Equatorial Guinea was admitted to the hospital with haemolytic anaemia, hyperbilirubinaemia and thrombocytopenia. During hospitalization, a thick blood smear was performed where parasitaemia by P. falciparum were observed and confirmed by real-time PCR assay. The patient developed cerebral malaria secondary to an ischaemic-type cerebral vascular event, hypotension and severe. After confirming diagnosis of P. falciparum infection, artesunate, artemether/lumefantrine and primaquine were started. Kidney biopsy revealed an active tubulointerstitial nephritis with acute tubular lesion and pigment tubulopathy with negative immunofluorescence. After CVVHDF, the patient received intermittent haemodialysis until the recovery of kidney function. After discharge, follow-up was carried until the successful resolution of the pregnancy by cesarean delivery and not shown deterioration in kidney function or proteinuria.</p><p><strong>Conclusion: </strong>In this case, intensive dialysis was started and dialysis intensity progressively reduced when kidney function improved. Due to the evolution of kidney function, a kidney biopsy was performed which showed tubulointerstitial nephritis as a manifestation of the infection. While the kidney biopsy was of interest for discriminating between tubular and glomerular involvement, the availability of placental biomarkers (sflt1-PlGF) would have been of help for ruling out preeclampsia and placental damage. The multidisciplinary approach to AKI during pregnancy should be the rule, with diligent care of maternal-fetal well-being during pregnancy and monitoring of kidney function after delivery.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"345"},"PeriodicalIF":2.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11572360/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field surveys in rural Tanzania reveal key opportunities for targeted larval source management and species sanitation to control malaria in areas dominated by Anopheles funestus.","authors":"Betwel J Msugupakulya, Nicolaus S Mhumbira, Dawson T Mziray, Masoud Kilalangongono, Mohamed Jumanne, Halfan S Ngowo, Najat F Kahamba, Alex J Limwagu, Meleji L Mollel, Prashanth Selvaraj, Anne L Wilson, Fredros O Okumu","doi":"10.1186/s12936-024-05172-x","DOIUrl":"10.1186/s12936-024-05172-x","url":null,"abstract":"<p><strong>Background: </strong>Larval source management (LSM) is re-emerging as a critical malaria intervention to address challenges associated with core vector control tools, such as insecticide-treated nets (ITNs), and to accelerate progress towards elimination. Presently, LSM is not widely used in rural settings and is instead more commonly applied in urban and arid settings. A systematic entomological assessment was conducted in rural communities of southeastern Tanzania, where insecticide-treated nets (ITNs) are widely used, to explore opportunities for deploying LSM to improve malaria control.</p><p><strong>Methods: </strong>Aquatic habitat surveys were conducted in 2022 and 2023 to understand habitat usage by different mosquito vectors, covering five villages during the rainy season and seven villages during the dry season. Additionally, samples of adult mosquitoes were collected to assess the role of various Anopheles species in malaria transmission in the area, and to explore opportunities for species sanitation using targeted LSM.</p><p><strong>Results: </strong>Adult mosquito surveys showed that in this area, the total entomological inoculation rates (EIR) for indoor collections were 20.1 and 6.5 infectious bites per person per year for outdoors. Anopheles funestus and Anopheles arabiensis were the only Anopheles vectors identified. Anopheles funestus was responsible for over 97.6% of the malaria transmission indoors and 95.4% outdoors. The concurrent larval surveys found that habitats with late instar An. arabiensis and An. funestus comprised only a small subset of 11.2%-16.5% of all water bodies in the rainy season, and 9.7%-15.2% in the dry season. In terms of size, these habitats covered 66.4%-68.2% of the total habitat areas in the wet season, reducing to 33.9%-40.6% in the dry season. From the rainy season to the dry season, the surface area of habitats occupied by An. arabiensis and An. funestus decreased by 92.0% to 97.5%, while the number of habitats occupied by An. arabiensis and An. funestus decreased by 38.0% to 57.3%. Anopheles funestus preferred large, permanent habitats with clear water and vegetation year-round, while An. arabiensis showed contrasting seasonal preferences, favouring sunlit still waters in the rainy season and larger, opaque habitats in the dry season.</p><p><strong>Conclusion: </strong>These findings suggest that An. funestus, which is the dominant malaria vector in the area, mediating over 95% of malaria transmission, preferentially occupies only a small subset of uniquely identifiable aquatic habitats in both wet and dry seasons. This presents an opportunity to expand LSM in rural settings by carefully targeting An. funestus habitats, which might be effective and logistically feasible as a complementary approach alongside existing interventions. Further research should assess the impact of targeted LSM for species sanitation compared to blanket LSM.</p>","PeriodicalId":18317,"journal":{"name":"Malaria Journal","volume":"23 1","pages":"344"},"PeriodicalIF":2.4,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11568556/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142644470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}