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1.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi ; 32(4): 436-440, 2020 May 08.
Artículo en Chino | MEDLINE | ID: mdl-32935526

RESUMEN

With the joint efforts of countries and global non-state actors, great achievements have been made in the global malaria control programme; however, malaria remains a serious threat to human health. As the global leader for combating malaria, WHO formulated The Global Technical Strategy for Malaria 2016-2030, and the Global Malaria Programme, under the leadership of WHO, is responsible for implementing 5 key projects to achieve the goal proposed in The Global Technical Strategy for Malaria 2016-2030. In addition, the Global Fund, the U.S. President's Malaria Initiative and Bill & Melinda Gates Foundation also play an important role in global malaria elimination programme. This review describes the currently main non-state actors participating in the global malaria elimination programme, and calls for the enhanced inter-actor coordination and close collaboration with state governments to achieve the great goal of malaria elimination in the world.


Asunto(s)
Erradicación de la Enfermedad , Malaria , Erradicación de la Enfermedad/economía , Erradicación de la Enfermedad/organización & administración , Erradicación de la Enfermedad/tendencias , Salud Global , Programas de Gobierno , Humanos , Malaria/prevención & control , Organizaciones
2.
Lancet Child Adolesc Health ; 4(10): 761-774, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32946830

RESUMEN

All malaria infections are harmful to both the pregnant mother and the developing fetus. One in ten maternal deaths in malaria endemic countries are estimated to result from Plasmodium falciparum infection. Malaria is associated with a 3-4 times increased risk of miscarriage and a substantially increased risk of stillbirth. Current treatment and prevention strategies reduce, but do not eliminate, malaria's damaging effects on pregnancy outcomes. Reviewing evidence generated from meta-analyses, systematic reviews, and observational data, the first paper in this Series aims to summarise the adverse effects of malaria in pregnancy on the fetus and how the current drug treatment and prevention strategies can alleviate these effects. Although evidence supports the safety and treatment efficacy of artemisinin-based combination therapies in the first trimester, these therapies have not been recommended by WHO for the treatment of malaria at this stage of pregnancy. Intermittent preventive treatment of malaria in pregnancy with sulfadoxine-pyrimethamine is contraindicated in the first trimester and provides imperfect chemoprevention because of inadequate dosing, poor (few and late) antenatal clinic attendance, increasing antimalarial drug resistance, and decreasing naturally acquired maternal immunity due to the decreased incidence of malaria. Alternative strategies to prevent malaria in pregnancy are needed. The prevention of all malaria infections by providing sustained exposure to effective concentrations of antimalarial drugs is key to reducing the adverse effects of malaria in pregnancy.


Asunto(s)
Antimaláricos/uso terapéutico , Malaria/tratamiento farmacológico , Complicaciones Parasitarias del Embarazo/tratamiento farmacológico , Pirimetamina/uso terapéutico , Sulfadoxina/uso terapéutico , Anomalías Inducidas por Medicamentos/prevención & control , Antimaláricos/efectos adversos , Esquema de Medicación , Combinación de Medicamentos , Femenino , Humanos , Malaria/prevención & control , Estudios Observacionales como Asunto , Embarazo , Pirimetamina/efectos adversos , Sulfadoxina/efectos adversos , Revisiones Sistemáticas como Asunto
3.
Lancet Child Adolesc Health ; 4(10): 775-789, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32946831

RESUMEN

Malaria disproportionately affects children younger than 5 years. Falciparum malaria is responsible for more than 200 000 child deaths per year in Africa and vivax malaria is well documented as a cause of severe anaemia and excess mortality in children in Asia and Oceania. For the treatment of malaria in children, paediatric dosing recommendations for several agents, including parenteral artesunate and dihydroartemisinin-piperaquine, have belatedly been shown to be suboptimal. Worsening antimalarial resistance in Plasmodium falciparum in the Greater Mekong Subregion threatens to undermine global efforts to control malaria. Triple antimalarial combination therapies are being evaluated to try to impede this threat. The RTS,S/AS01 vaccine gives partial protection against falciparum malaria and is being evaluated in large, pilot studies in Ghana, Malawi, and Kenya as a complementary tool to other preventive measures. Seasonal malaria chemoprevention in west Africa has resulted in declines in malaria incidence and deaths and there is interest in scaling up efforts by expanding the age range of eligible recipients. Preventing relapse in Plasmodium vivax infection with primaquine is challenging because treating children who have G6PD deficiency with primaquine can cause acute haemolytic anaemia. The safety of escalating dose regimens for primaquine is being studied to mitigate this risk.


Asunto(s)
Antimaláricos/uso terapéutico , Artemisininas/uso terapéutico , Bienestar del Niño/estadística & datos numéricos , Vacunas contra la Malaria/uso terapéutico , Malaria/tratamiento farmacológico , Malaria/prevención & control , Niño , Relación Dosis-Respuesta a Droga , Resistencia a Múltiples Medicamentos , Femenino , Humanos , Malaria/epidemiología , Masculino , Estaciones del Año , Vacunación/estadística & datos numéricos
4.
PLoS Med ; 17(9): e1003248, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32946451

RESUMEN

BACKGROUND: Two billion long-lasting insecticidal nets (LLINs) have been procured for malaria control. A functional LLIN is one that is present, is in good physical condition, and remains insecticidal, thereby providing protection against vector-borne diseases through preventing bites and killing disease vectors. The World Health Organization (WHO) prequalifies LLINs that remain adequately insecticidal 3 years after deployment. Therefore, institutional buyers often assume that prequalified LLINs are functionally identical with a 3-year lifespan. We measured the lifespans of 3 LLIN products, and calculated their cost per year of functional life, to demonstrate the economic and public health importance of procuring the most cost-effective LLIN product based on its lifespan. METHODS AND FINDINGS: A randomised double-blinded trial of 3 pyrethroid LLIN products (10,571 nets in total) was conducted at 3 follow-up points: 10 months (August-October 2014), 22 months (August-October 2015), and 36 months (October-December 2016) among 3,393 households in Tanzania using WHO-recommended methods. Primary outcome was LLIN functional survival (LLIN present and in serviceable condition). Secondary outcomes were (1) bioefficacy and chemical content (residual insecticidal activity) and (2) protective efficacy for volunteers sleeping under the LLINs (bite reduction and mosquitoes killed). Median LLIN functional survival was significantly different between the 3 net products (p = 0.001): 2.0 years (95% CI 1.7-2.3) for Olyset, 2.5 years (95% CI 2.2-2.8) for PermaNet 2.0 (hazard ratio [HR] 0.73 [95% CI 0.64-0.85], p = 0.001), and 2.6 years (95% CI 2.3-2.8) for NetProtect (HR = 0.70 [95% CI 0.62-0.77], p < 0.001). Functional survival was affected by accumulation of holes, leading to users discarding nets. Protective efficacy also significantly differed between products as they aged. Equivalent annual cost varied between US$1.2 (95% CI $1.1-$1.4) and US$1.5 (95% CI $1.3-$1.7), assuming that each net was priced identically at US$3. The 2 longer-lived nets (PermaNet and NetProtect) were 20% cheaper than the shorter-lived product (Olyset). The trial was limited to only the most widely sold LLINs in Tanzania. Functional survival varies by country, so the single country setting is a limitation. CONCLUSIONS: These results suggest that LLIN functional survival is less than 3 years and differs substantially between products, and these differences strongly influence LLIN value for money. LLIN tendering processes should consider local expectations of cost per year of functional life and not unit price. As new LLIN products come on the market, especially those with new insecticides, it will be imperative to monitor their comparative durability to ensure that the most cost-effective products are procured for malaria control.


Asunto(s)
Mosquiteros Tratados con Insecticida/economía , Insecticidas/economía , Control de Mosquitos/métodos , Animales , Culicidae/efectos de los fármacos , Vectores de Enfermedades , Composición Familiar , Estudios de Seguimiento , Humanos , Resistencia a los Insecticidas/efectos de los fármacos , Mosquiteros Tratados con Insecticida/tendencias , Insecticidas/farmacología , Malaria/prevención & control , Control de Mosquitos/economía , Mosquitos Vectores/efectos de los fármacos , Piretrinas/farmacología , Tanzanía/epidemiología
5.
BMC Public Health ; 20(1): 1468, 2020 Sep 29.
Artículo en Inglés | MEDLINE | ID: mdl-32993550

RESUMEN

BACKGROUND: In Ethiopia, malaria is one of the public health problems, and it is still among the ten top leading causes of morbidity and mortality among under-five children. However, the studies conducted in the country have been inconclusive and inconsistent. Thus, this study aimed to assess factors associated with malaria among under-five children in Ethiopia. METHODS: We retrieved secondary data from the malaria indicator survey data collected from September 30 to December 10, 2015, in Ethiopia. A total of 8301 under-five-year-old children who had microscopy test results were included in the study. Bayesian multilevel logistic regression models were fitted and Markov chain Monte Carlo simulation was used to estimate the model parameters using Gibbs sampling. Adjusted Odd Ratio with 95% credible interval in the multivariable model was used to select variables that have a significant association with malaria. RESULTS: In this study, sleeping under the insecticide-treated bed nets during bed time (ITN) [AOR 0.58,95% CI, 0.31-0.97)], having 2 and more ITN for the household [AOR 0.43, (95% CI, 0.17-0.88)], have radio [AOR 0.41, (95% CI, 0.19-0.78)], have television [AOR 0.19, (95% CI, 0.01-0.89)] and altitude [AOR 0.05, (95% CI, 0.01-0.13)] were the predictors of malaria among under-five children. CONCLUSIONS: The study revealed that sleeping under ITN, having two and more ITN for the household, altitude, availability of radio, and television were the predictors of malaria among under-five children in Ethiopia. Thus, the government should strengthen the availability and utilization of ITN to halt under-five mortality due to malaria.


Asunto(s)
Salud del Niño/estadística & datos numéricos , Mosquiteros Tratados con Insecticida/estadística & datos numéricos , Malaria/prevención & control , Población Rural/estadística & datos numéricos , Teorema de Bayes , Niño , Preescolar , Etiopía , Composición Familiar , Femenino , Humanos , Lactante , Modelos Logísticos , Masculino , Análisis Multinivel , Estadísticas no Paramétricas , Encuestas y Cuestionarios
7.
Malawi Med J ; 32(1): 45-51, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-32733659

RESUMEN

Background: Intermittent presumptive treatment in pregnancy (IPTp) of malaria using sulfadoxine-pyrimethamine (SP) was introduced in Nigeria in 2005 to reduce the burden of malaria in pregnancy. By 2013, 23% of reproductive aged women surveyed received SP for malaria prevention in their last pregnancy of the past 5 years. This paper highlights geographic and socio-economic variations and inequities in accessing and using SP for malaria prophylaxis in pregnancy in Nigeria, as well as client-related and service delivery determinants. Methods: Secondary data from 2013 Nigeria demographic and health survey (DHS) was used. Sample of 38,948 eligible women were selected for interview using stratified three-stage cluster design. Data obtained from the individual recode dataset was used for descriptive and logistic regression analysis of factors associated with SP use in pregnancy was performed. Independent variables were age, media exposure, region, place of residence, wealth index, place of antenatal care (ANC) attendance and number of visits. Results: Women in the upper three wealth quintiles were 1.33 - 1.80 times more likely to receive SP than the poorest (CI: 1.15-1.56; 1.41-1.97; 1.49-2.17). Women who received ANC from public health facilities were twice as likely (inverse of OR 0.68) to use SP in pregnancy than those who used private facilities (CI: 0.60-0.76). Those who attended at least 4 ANC visits were 1.46 times more likely to get SP prophylaxis (CI: 1.31-1.63). Using the unadjusted odds ratio, women residing in rural areas were 0.86 times less likely to use SP compared to those in urban areas. Conclusions: Inequities in access to and use of SP for malaria prophylaxis in pregnancy exist across sub-population groups in Nigeria. Targeted interventions on the least covered are needed to reduce existing inequities and scale-up IPTp of malaria.


Asunto(s)
Antimaláricos/administración & dosificación , Accesibilidad a los Servicios de Salud/estadística & datos numéricos , Disparidades en Atención de Salud , Malaria/prevención & control , Complicaciones Parasitarias del Embarazo/prevención & control , Atención Prenatal/estadística & datos numéricos , Pirimetamina/administración & dosificación , Sulfadoxina/administración & dosificación , Adolescente , Adulto , Antimaláricos/uso terapéutico , Combinación de Medicamentos , Femenino , Encuestas de Atención de la Salud , Humanos , Persona de Mediana Edad , Nigeria , Aceptación de la Atención de Salud/estadística & datos numéricos , Embarazo , Complicaciones Parasitarias del Embarazo/tratamiento farmacológico , Pirimetamina/uso terapéutico , Sulfadoxina/uso terapéutico , Adulto Joven
9.
PLoS Comput Biol ; 16(8): e1008121, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32797077

RESUMEN

Vector control has been a key component in the fight against malaria for decades, and chemical insecticides are critical to the success of vector control programs worldwide. However, increasing resistance to insecticides threatens to undermine these efforts. Understanding the evolution and propagation of resistance is thus imperative to mitigating loss of intervention effectiveness. Additionally, accelerated research and development of new tools that can be deployed alongside existing vector control strategies is key to eradicating malaria in the near future. Methods such as gene drives that aim to genetically modify large mosquito populations in the wild to either render them refractory to malaria or impair their reproduction may prove invaluable tools. Mathematical models of gene flow in populations, which is the transfer of genetic information from one population to another through migration, can offer invaluable insight into the behavior and potential impact of gene drives as well as the spread of insecticide resistance in the wild. Here, we present the first multi-locus, agent-based model of vector genetics that accounts for mutations and a many-to-many mapping cardinality of genotypes to phenotypes to investigate gene flow, and the propagation of gene drives in Anopheline populations. This model is embedded within a large scale individual-based model of malaria transmission representative of a high burden, high transmission setting characteristic of the Sahel. Results are presented for the selection of insecticide-resistant vectors and the spread of resistance through repeated deployment of insecticide treated nets (ITNs), in addition to scenarios where gene drives act in concert with existing vector control tools such as ITNs. The roles of seasonality, spatial distribution of vector habitat and feed sites, and existing vector control in propagating alleles that confer phenotypic traits via gene drives that result in reduced transmission are explored. The ability to model a spectrum of vector species with different genotypes and phenotypes in the context of malaria transmission allows us to test deployment strategies for existing interventions that reduce the deleterious effects of resistance and allows exploration of the impact of new tools being proposed or developed.


Asunto(s)
Anopheles/genética , Tecnología de Genética Dirigida/métodos , Resistencia a los Insecticidas/genética , Malaria , Mosquitos Vectores/genética , Animales , Aptitud Genética , Humanos , Malaria/prevención & control , Malaria/transmisión , Análisis de Sistemas
10.
PLoS Med ; 17(8): e1003214, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32822362

RESUMEN

BACKGROUND: Seasonal malaria chemoprevention (SMC) is now widely deployed in the Sahel, including several countries that are major contributors to the global burden of malaria. Consequently, it is important to understand whether SMC continues to provide a high level of protection and how SMC might be improved. SMC was evaluated using data from a large, household-randomised trial in Houndé, Burkina Faso and Bougouni, Mali. METHODS AND FINDINGS: The parent trial evaluated monthly SMC plus either azithromycin (AZ) or placebo, administered as directly observed therapy 4 times per year between August and November (2014-2016). In July 2014, 19,578 children aged 3-59 months were randomised by household to study group. Children who remained within the age range 3-59 months in August each year, plus children born into study households or who moved into the study area, received study drugs in 2015 and 2016. These analyses focus on the approximately 10,000 children (5,000 per country) under observation each year in the SMC plus placebo group. Despite high coverage and high adherence to SMC, the incidence of hospitalisations or deaths due to malaria and uncomplicated clinical malaria remained high in the study areas (overall incidence rates 12.5 [95% confidence interval (CI): 11.2, 14.1] and 871.1 [95% CI: 852.3, 890.6] cases per 1,000 person-years, respectively) and peaked in July each year, before SMC delivery began in August. The incidence rate ratio comparing SMC within the past 28 days with SMC more than 35 days ago-adjusted for age, country, and household clustering-was 0.13 (95% CI: 0.08, 0.20), P < 0.001 for malaria hospitalisations and deaths from malaria and 0.21 (95% CI 0.20, 0.23), P < 0.001 for uncomplicated malaria, indicating protective efficacy of 87.4% (95% CI: 79.6%, 92.2%) and 78.3% (95% CI: 76.8%, 79.6%), respectively. The prevalence of malaria parasitaemia at weekly surveys during the rainy season and at the end of the transmission season was several times higher in children who missed the SMC course preceding the survey contact, and the smallest prevalence ratio observed was 2.98 (95% CI: 1.95, 4.54), P < 0.001. The frequency of molecular markers of sulfadoxine-pyrimethamine (SP) and amodiaquine (AQ) resistance did not increase markedly over the study period either amongst study children or amongst school-age children resident in the study areas. After 3 years of SMC deployment, the day 28 PCR-unadjusted adequate clinical and parasitological response rate of the SP + AQ regimen in children with asymptomatic malaria was 98.3% (95% CI: 88.6%, 99.8%) in Burkina Faso and 96.1% (95% CI: 91.5%, 98.2%) in Mali. Key limitations of this study are the potential overdiagnosis of uncomplicated malaria by rapid diagnostic tests and the potential for residual confounding from factors related to adherence to the monthly SMC schedule. CONCLUSION: Despite strong evidence that SMC is providing a high level of protection, the burden of malaria remains substantial in the 2 study areas. These results emphasise the need for continuing support of SMC programmes. A fifth monthly SMC course is needed to adequately cover the whole transmission season in the study areas and in settings with similar epidemiology. TRIAL REGISTRATION: The AZ-SMC trial in which these data were collected was registered at clinicaltrials.gov: NCT02211729.


Asunto(s)
Antimaláricos/administración & dosificación , Composición Familiar , Malaria/epidemiología , Malaria/prevención & control , Estaciones del Año , Burkina Faso/epidemiología , Quimioprevención/métodos , Niño , Preescolar , Estudios de Cohortes , Femenino , Estudios de Seguimiento , Humanos , Lactante , Malaria/sangre , Masculino , Malí/epidemiología
11.
PLoS One ; 15(8): e0237407, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32764806

RESUMEN

BACKGROUND: Uganda ranks third in the number of deaths attributable to malaria and has some of the highest recorded malaria transmission rates in the general population. Malaria in Pregnancy is associated with detrimental effects for the mother and unborn baby and these effects seem to have long term effects and consequences on the life of the baby. Despite the preventive measures put in place by the World Health Organization in antenatal care, the burden of malaria in pregnancy is still high. We determined the use of malaria preventive strategies during pregnancy and the presence of plasmodium infection, anemia, and low birth weight babies at delivery among parturient women at Mbale regional referral hospital in eastern Uganda. METHODS: A cross-sectional study was conducted among 210 women delivering at MRRH between July 2017 and January 2018. Information on demographics, antenatal care, and prevention practices was collected using an interviewer-administered questionnaire. Maternal venous blood and cord blood samples were screened for Plasmodium infection by both microscopy of Giemsa-stained blood films and Plasmodium falciparum rapid diagnostic test (pf. HPR2 mRDT). Polymerase Chain Reaction (PCR) was done on cord blood. The presence of anemia was determined by the use of an automated hemoglobin analyzer. Data were analyzed using descriptive and analytical statistics. RESULTS: Of the 210 women, 3 (1.4%) and 19(9.1%) tested positive for malaria by using Giemsa stained blood smear microscopy and malaria rapid diagnosticMRDT tests respectively. PCR detected 4(%) of Plasmodium in cord blood. Twenty-nine percent of the women had anaemia and 11 (5.2%) had low birth weight babies. Only 23.3% of the women received at least three doses of IPTp-SP and 57.9% reported sleeping under an Insecticide Treated Net the night before the survey. The women who reported sleeping under a mosquito net the previous night (OR 0.67, 95% CI: 0.24-1.86) and those who reported taking fansidar as a directly observed therapy (OR 0.31, 95% CI: 0.04-2.39) appeared to have few chances of getting plasmodium infection though the findings were not statistically significant. CONCLUSION: The effective use of malaria preventive strategies (IPT-SP and Insecticide Treated Nets) was generally low. Most of the women took less than three doses of SP and there was no strict adherence to the recommended directly observed therapy. The prevalence of Plasmodium infection during pregnancy was low though maternal anaemia and low birth weight were relatively high.


Asunto(s)
Parto Obstétrico , Malaria/prevención & control , Complicaciones Parasitarias del Embarazo/prevención & control , Centros de Atención Terciaria/estadística & datos numéricos , Adolescente , Adulto , Antimaláricos/uso terapéutico , Estudios Transversales , Femenino , Humanos , Recién Nacido , Malaria/tratamiento farmacológico , Malaria/epidemiología , Madres , Embarazo , Complicaciones Parasitarias del Embarazo/tratamiento farmacológico , Complicaciones Parasitarias del Embarazo/epidemiología , Uganda/epidemiología , Adulto Joven
12.
PLoS One ; 15(8): e0237671, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32797068

RESUMEN

In high malaria transmission settings, the use of sulfadoxine-pyrimethamine-based intermittent preventive treatment during pregnancy (IPTp-SP) has resulted in decreased antibody (Ab) levels to VAR2CSA. However, information of Ab levels in areas of low or intermediate malaria transmission after long-term implementation of IPTp-SP is still lacking. The present study sought to evaluate antibody prevalence and levels in women at delivery in Etoudi, a peri-urban area in the capital of Yaoundé, Cameroon, that is a relatively low-malaria transmission area. Peripheral plasma samples from 130 pregnant women were collected at delivery and tested for IgG to the full-length recombinant VAR2CSA (FV2) and its most immunogenic subdomain, DBL5. The study was conducted between 2013 and 2015, approximately ten years after implementation of IPTp-SP in Cameroon. About 8.6% of the women attending the clinic had placental malaria (PM). One, two or 3 doses of SP did not impact significantly on either the percentage of women with Ab to FV2 and DBL5 or Ab levels in Ab-positive women compared to women not taking SP. The prevalence of Ab to FV2 and DBL5 was only 36.9% and 36.1%, respectively. Surprisingly, among women who had PM at delivery, only 61.5% and 57.7% had Ab to FV2 and DBL5, respectively, with only 52.9% and 47.1% in PM-positive paucigravidae and 77.7% of multigravidae having Ab to both antigens. These results suggest that long-term implementation of IPTp-SP in a low-malaria transmission area results in few women having Ab to VAR2CSA.


Asunto(s)
Anticuerpos Antiprotozoarios/inmunología , Antígenos de Protozoos/inmunología , Antimaláricos/uso terapéutico , Malaria Falciparum/prevención & control , Complicaciones Parasitarias del Embarazo/prevención & control , Pirimetamina/uso terapéutico , Sulfadoxina/uso terapéutico , Adulto , Anticuerpos Antiprotozoarios/sangre , Camerún/epidemiología , Combinación de Medicamentos , Femenino , Humanos , Inmunoglobulina G/sangre , Inmunoglobulina G/inmunología , Malaria/sangre , Malaria/epidemiología , Malaria/inmunología , Malaria/prevención & control , Malaria Falciparum/sangre , Malaria Falciparum/epidemiología , Malaria Falciparum/inmunología , Plasmodium falciparum/efectos de los fármacos , Plasmodium falciparum/inmunología , Embarazo , Complicaciones Parasitarias del Embarazo/sangre , Complicaciones Parasitarias del Embarazo/epidemiología , Complicaciones Parasitarias del Embarazo/inmunología , Adulto Joven
13.
PLoS One ; 15(8): e0237396, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32833984

RESUMEN

This study explores the motivational factors and barriers to participate in a citizen science program for malaria control in Rwanda. It assesses the changes in motivational factors over time and compares these factors among age and gender groups. Using a qualitative approach, this study involved 44 participants. At the initial stage, people participated in the program because of curiosity, desire to learn new things, helping others, and willingness to contribute to malaria control. As the engagement continued, other factors including ease of use of materials to report observations, the usefulness of the program, and recognition also played a crucial role in the retention of volunteers. Lack of time and information about the recruitment process, perceived low efficacy of the mosquito trap, and difficulties in collecting observations were reported as barriers to get and stay involved. Some variations in the motivational factors were observed among age and gender groups. At the initial phase, young adults and adults, as well as men and women were almost equally motivated to contribute to malaria control. For the ongoing phase, for age, the two groups were almost equally motivated by recognition of their effort. Also, the opportunity for learning was an important factor among young adults while ease of use of the materials was central for adults. For gender, the usefulness of the project, ease of use of materials, and learning opportunities were important motivational factors among women, while men were more motivated by recognition of their efforts. A framework including motivational factors and barriers at each stage of participation is presented. This framework may be used to explore motivations and barriers in future citizen science projects and might help coordinators of citizen science programs to determine whom to target, by which message, and at what stage of participation to retain volunteers in citizen science projects.


Asunto(s)
Ciencia Ciudadana/estadística & datos numéricos , Malaria/prevención & control , Motivación , Adulto , Factores de Edad , Femenino , Humanos , Masculino , Rwanda , Factores Sexuales , Encuestas y Cuestionarios
15.
BMC Med ; 18(1): 239, 2020 07 30.
Artículo en Inglés | MEDLINE | ID: mdl-32727467

RESUMEN

BACKGROUND: The COVID-19 pandemic has resulted in millions of infections, hundreds of thousands of deaths and major societal disruption due to lockdowns and other restrictions introduced to limit disease spread. Relatively little attention has been paid to understanding how the pandemic has affected treatment, prevention and control of malaria, which is a major cause of death and disease and predominantly affects people in less well-resourced settings. MAIN BODY: Recent successes in malaria control and elimination have reduced the global malaria burden, but these gains are fragile and progress has stalled in the past 5 years. Withdrawing successful interventions often results in rapid malaria resurgence, primarily threatening vulnerable young children and pregnant women. Malaria programmes are being affected in many ways by COVID-19. For prevention of malaria, insecticide-treated nets need regular renewal, but distribution campaigns have been delayed or cancelled. For detection and treatment of malaria, individuals may stop attending health facilities, out of fear of exposure to COVID-19, or because they cannot afford transport, and health care workers require additional resources to protect themselves from COVID-19. Supplies of diagnostics and drugs are being interrupted, which is compounded by production of substandard and falsified medicines and diagnostics. These disruptions are predicted to double the number of young African children dying of malaria in the coming year and may impact efforts to control the spread of drug resistance. Using examples from successful malaria control and elimination campaigns, we propose strategies to re-establish malaria control activities and maintain elimination efforts in the context of the COVID-19 pandemic, which is likely to be a long-term challenge. All sectors of society, including governments, donors, private sector and civil society organisations, have crucial roles to play to prevent malaria resurgence. Sparse resources must be allocated efficiently to ensure integrated health care systems that can sustain control activities against COVID-19 as well as malaria and other priority infectious diseases. CONCLUSION: As we deal with the COVID-19 pandemic, it is crucial that other major killers such as malaria are not ignored. History tells us that if we do, the consequences will be dire, particularly in vulnerable populations.


Asunto(s)
Betacoronavirus , Planificación en Salud Comunitaria/organización & administración , Infecciones por Coronavirus/prevención & control , Malaria/prevención & control , Pandemias/prevención & control , Neumonía Viral/prevención & control , Adulto , Niño , Comorbilidad , Infecciones por Coronavirus/epidemiología , Resistencia a Medicamentos , Femenino , Humanos , Malaria/epidemiología , Persona de Mediana Edad , Neumonía Viral/epidemiología , Embarazo , Servicios Preventivos de Salud/organización & administración , Adulto Joven
16.
Stud Health Technol Inform ; 272: 425-428, 2020 Jun 26.
Artículo en Inglés | MEDLINE | ID: mdl-32604693

RESUMEN

This paper reports on the early-stage development of an analytics framework to support the semantic integration of dynamic surveillance data across multiple scales to inform decision making for malaria eradication. We propose using the Semantic Web of Things (SWoT), a combination of Internet of Things (IoT) and semantic web technologies, to support the evolution and integration of dynamic malaria data sources and improve interoperability between different datasets generated through relevant IoT assets (e.g. computers, sensors, persons, and other smart objects and devices).


Asunto(s)
Web Semántica , Humanos , Almacenamiento y Recuperación de la Información , Malaria/prevención & control , Prevención Primaria
17.
Korean J Parasitol ; 58(3): 267-278, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32615740

RESUMEN

The heterogeneity and complexity of malaria involves political and natural environments, socioeconomic development, cross-border movement, and vector biology; factors that cannot be changed in a short time. This study aimed to assess the impact of economic growth and cross-border movement, toward elimination of malaria in Yunnan Province during its pre-elimination phase. Malaria data during 2011-2016 were extracted from 18 counties of Yunnan and from 7 villages, 11 displaced person camps of the Kachin Special Region II of Myanmar. Data of per-capita gross domestic product (GDP) were obtained from Yunnan Bureau of Statistics. Data were analyzed and mapped to determine spatiotemporal heterogeneity at county and village levels. There were a total 2,117 malaria cases with 85.2% imported cases; most imported cases came from Myanmar (78.5%). Along the demarcation line, malaria incidence rates in villages/camps in Myanmar were significantly higher than those of the neighboring villages in China. The spatial and temporal trends suggested that increasing per-capita GDP may have an indirect effect on the reduction of malaria cases when observed at macro level; however, malaria persists owing to complex, multi-faceted factors including poverty at individual level and cross-border movement of the workforce. In moving toward malaria elimination, despite economic growth, cooperative efforts with neighboring countries are critical to interrupt local transmission and prevent reintroduction of malaria via imported cases. Cross-border workers should be educated in preventive measures through effective behavior change communication, and investment is needed in active surveillance systems and novel diagnostic and treatment services during the elimination phase.


Asunto(s)
Economía , Malaria/epidemiología , Migrantes , China/epidemiología , Femenino , Guanosina Difosfato , Educación en Salud , Humanos , Malaria/prevención & control , Masculino , Mianmar/epidemiología , Factores Socioeconómicos
18.
Nat Commun ; 11(1): 3646, 2020 07 20.
Artículo en Inglés | MEDLINE | ID: mdl-32686679

RESUMEN

Papua New Guinea (PNG) has the highest malaria transmission outside of Africa. Long-lasting insecticidal nets (LLINs) are believed to have helped to reduce average malaria prevalence in PNG from 16% in 2008 to 1% in 2014. Since 2015 malaria in PNG has resurged significantly. Here, we present observations documenting decreased bioefficacy of unused LLINs with manufacturing dates between 2013 and 2019 collected from villages and LLIN distributors in PNG. Specifically, we show that of n = 167 tested LLINs manufactured after 2013, only 17% are fulfilling the required World Health Organisation bioefficacy standards of ≥ 80% 24 h mortality or ≥ 95% 60 min knockdown in bioassays with pyrethroid susceptible Anopheles farauti mosquitoes. In contrast, all (100%, n = 25) LLINs with manufacturing dates prior to 2013 are meeting these bioefficacy standards. These results suggest that decreased bioefficacy of LLINs is contributing to the malaria resurgence in PNG and increased scrutiny of LLIN quality is warranted.


Asunto(s)
Malaria , Control de Mosquitos/métodos , Animales , Anopheles/efectos de los fármacos , Humanos , Mosquiteros Tratados con Insecticida , Insecticidas/farmacología , Malaria/epidemiología , Malaria/prevención & control , Malaria/transmisión , Mosquitos Vectores/efectos de los fármacos , Papúa Nueva Guinea/epidemiología , Piretrinas/farmacología
19.
Lancet Glob Health ; 8(9): e1132-e1141, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32673577

RESUMEN

BACKGROUND: COVID-19 has the potential to cause substantial disruptions to health services, due to cases overburdening the health system or response measures limiting usual programmatic activities. We aimed to quantify the extent to which disruptions to services for HIV, tuberculosis, and malaria in low-income and middle-income countries with high burdens of these diseases could lead to additional loss of life over the next 5 years. METHODS: Assuming a basic reproduction number of 3·0, we constructed four scenarios for possible responses to the COVID-19 pandemic: no action, mitigation for 6 months, suppression for 2 months, or suppression for 1 year. We used established transmission models of HIV, tuberculosis, and malaria to estimate the additional impact on health that could be caused in selected settings, either due to COVID-19 interventions limiting activities, or due to the high demand on the health system due to the COVID-19 pandemic. FINDINGS: In high-burden settings, deaths due to HIV, tuberculosis, and malaria over 5 years could increase by up to 10%, 20%, and 36%, respectively, compared with if there was no COVID-19 pandemic. The greatest impact on HIV was estimated to be from interruption to antiretroviral therapy, which could occur during a period of high health system demand. For tuberculosis, the greatest impact would be from reductions in timely diagnosis and treatment of new cases, which could result from any prolonged period of COVID-19 suppression interventions. The greatest impact on malaria burden could be as a result of interruption of planned net campaigns. These disruptions could lead to a loss of life-years over 5 years that is of the same order of magnitude as the direct impact from COVID-19 in places with a high burden of malaria and large HIV and tuberculosis epidemics. INTERPRETATION: Maintaining the most critical prevention activities and health-care services for HIV, tuberculosis, and malaria could substantially reduce the overall impact of the COVID-19 pandemic. FUNDING: Bill & Melinda Gates Foundation, Wellcome Trust, UK Department for International Development, and Medical Research Council.


Asunto(s)
Infecciones por Coronavirus/epidemiología , Países en Desarrollo , Infecciones por VIH/prevención & control , Accesibilidad a los Servicios de Salud , Malaria/prevención & control , Pandemias , Neumonía Viral/epidemiología , Tuberculosis/prevención & control , Infecciones por VIH/epidemiología , Infecciones por VIH/mortalidad , Humanos , Malaria/epidemiología , Malaria/mortalidad , Modelos Teóricos , Tuberculosis/epidemiología , Tuberculosis/mortalidad
20.
PLoS One ; 15(7): e0235631, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32628741

RESUMEN

BACKGROUND: As new combinations of interventions aiming at interrupting malaria transmission are under evaluation, understanding the associated economic costs and benefits is critical for decision-making. This study assessed the economic cost and cost-effectiveness of the Magude project, a malaria elimination initiative implemented in a district in southern Mozambique (i.e. Magude) between August 2015-June 2018. This project piloted a combination of two mass drug administration (MDA) rounds per year for two consecutive years, annual rounds of universal indoor residual spraying (IRS) and a strengthened surveillance and response system on the back of universal long-lasting insecticide treated net (LLIN) coverage and routine case management implemented by the National Malaria Control Program (NMCP). Although local transmission was not interrupted, the project achieved large reductions in the burden of malaria in the target district. METHODS: We collected weekly economic data, estimated costs from the project implementer perspective and assessed the incremental cost-effectiveness ratio (ICER) associated with the Magude project as compared to routine malaria control activities, the counterfactual. We estimated disability-adjusted life years (DALYs) for malaria cases and deaths and assessed the variation of the ICER over time to capture the marginal costs and effectiveness associated with subsequent phases of project implementation. We used deterministic and probabilistic sensitivity analyses to account for uncertainty and built an alternative scenario by assuming the implementation of the interventions from a governmental perspective. Economic costs are provided in constant US$2015. RESULTS: After three years, the Magude project averted a total of 3,171 DALYs at an incremental cost of $2.89 million and an average yearly cost of $20.7 per targeted person. At an average cost of $19.4 per person treated per MDA round, the social mobilization and distribution of door-to-door MDA contributed to 53% of overall resources employed, with personnel and logistics being the main cost drivers. The ICER improved over time as a result of decreasing costs and improved effectiveness. The overall ICER was $987 (CI95% 968-1,006) per DALY averted, which is below the standard cost-effectiveness (CE) threshold of $1,404/DALY averted, three times the gross domestic product (GDP) per capita of Mozambique, but above the threshold of interventions considered highly cost-effective (one time the GDP per capita or $468/DALY averted) and above the recently suggested thresholds based on the health opportunity cost ($537 purchasing power parity/ DALY averted). A significantly lower ICER was obtained in the implementation scenario from a governmental perspective ($441/DALY averted). CONCLUSION: Despite the initial high costs and volume of resources associated with its implementation, MDA in combination with other existing malaria control interventions, can be a cost-effective strategy to drastically reduce transmission in areas of low to moderate transmission in sub-Saharan Africa. However, further studies are needed to understand the capacity of the health system and financial affordability to scale up such strategies at regional or national level.


Asunto(s)
Análisis Costo-Beneficio , Malaria/economía , Malaria/prevención & control , Administración Masiva de Medicamentos/economía , Humanos , Administración Masiva de Medicamentos/estadística & datos numéricos , Mozambique
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