ArticleMalaria journal2015
Active case surveillance, passive case surveillance and asymptomatic malaria parasite screening illustrate different age distribution, spatial clustering and seasonality in western Kenya.
Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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Who cites it
31 citing papers in PubMed.
- Efficacy of attractive targeted sugar bait stations against malaria in Western Province Zambia: epidemiological findings from a two-arm cluster randomized phase III trial.Malaria journal · 2024Trial
- Reactive, self-administered malaria treatment against asymptomatic malaria infection: results of a cluster randomized controlled trial in The Gambia.Malaria journal · 2021Trial
- Trial
- Culicidae vector ecology in southern Iran: Integrating Faunistics and molecular analysis of blood-feeding preferences to strengthen malaria surveillance in transition zones.Parasite epidemiology and control · 2025Article
- Integrating forest data and health facility surveys to optimise risk-based malaria surveillance in the Philippines.Frontiers in public health · 2025Article
- Malaria transmission heterogeneity in different eco-epidemiological areas of western Kenya: a region-wide observational and risk classification study for adaptive intervention planning.Malaria journal · 2024Observational
- Community case management of malaria in Western Kenya: performance of community health volunteers in active malaria case surveillance.Malaria journal · 2023Article
- Irrigation-Induced Environmental Changes Sustain Malaria Transmission and Compromise Intervention Effectiveness.The Journal of infectious diseases · 2022Article
- Impact of Environmental Modifications on the Ecology, Epidemiology, and Pathogenesis of Plasmodium falciparum and Plasmodium vivax Malaria in East Africa.The American journal of tropical medicine and hygiene · 2022Article
- Application of a VP4/VP2-inferred transmission clusters in estimating the impact of interventions on rhinovirus transmission.Virology journal · 2022Article
- Predictors of Test Positivity, Mortality, and Seropositivity during the Early Coronavirus Disease Epidemic, Orange County, California, USA.Emerging infectious diseases · 2021Article
- Estimating the local spatio-temporal distribution of malaria from routine health information systems in areas of low health care access and reporting.International journal of health geographics · 2021Article
- Gaps between Knowledge and Malaria Treatment Practices after Intensive Anti-Malaria Campaigns in Western Kenya: 2004-2016.The American journal of tropical medicine and hygiene · 2020Article
- Distance sampling for epidemiology: an interactive tool for estimating under-reporting of cases from clinic data.International journal of health geographics · 2020Article
- Mosquito Exposure and Malaria Morbidity: A Microlevel Analysis of Household Mosquito Populations and Malaria in a Population-Based Longitudinal Cohort in Western Kenya.The Journal of infectious diseases · 2020Article
- Challenges and the Path Forward on Malaria Elimination Intervention: A Systematic Review.Iranian journal of public health · 2019Review
- Molecular epidemiology of residual Plasmodium vivax transmission in a paediatric cohort in Solomon Islands.Malaria journal · 2019Observational
- Risk factors for Plasmodium falciparum infection in the Kenyan Highlands: a cohort study.Transactions of the Royal Society of Tropical Medicine and Hygiene · 2019Article
- Malaria epidemiology in Suriname from 2000 to 2016: trends, opportunities and challenges for elimination.Malaria journal · 2018Article
- Article
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Abstract
backgroundEpidemiological characteristics of clinical malaria may differ from asymptomatic infections, thus both cross-sectional parasite screening and longitudinal clinical case surveillance are necessary for malaria transmission monitoring and control.
methodsIn order to monitor malaria transmission, surveillance of clinical malaria from two years of active case surveillance in three cohorts of 6,750 individuals, asymptomatic parasitaemia cases of 5,300 individuals and clinical cases in three study areas were carried out in the western Kenyan highlands in 2009 and 2010. Age distribution, seasonality and spatial clustering were analysed.
resultsThe results revealed a significant difference in the age distribution of clinical cases between passive and active case surveillance, and between clinical case rate and asymptomatic parasite rate. The number of reported cases from health facilities significantly underestimated clinical malaria incidence. The increase in asymptomatic parasite prevalence from low to high transmission seasons was significantly higher for infants (<two years) and adults (≥15 years) (500% increase) than that for children (two to 14 years, 65%), but the increase in clinical incidence rates was significantly higher for children (700%) than that for adults (300%). Hotspot of asymptomatic infections remained unchanged over time, whereas new clusters of clinical malaria cases emerged in the uphill areas during the peak season.
conclusionsDifferent surveillance methods revealed different characteristics of malaria infections. The new transmission hotspots identified during the peak season with only active case surveillance is an important observation with clear implications in the context of malaria elimination. Both mass parasite screening and active case surveillance are essential for malaria transmission monitoring and control.
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