Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children
Abstract Background Transmission of malaria in sub-Saharan Africa has become increasingly stratified following decades of malaria control interventions. The extent to which environmental and land cover risk factors for malaria may differ across distinct strata of transmission intensity is not well k...
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ftdoajarticles:oai:doaj.org/article:d059fd4d0706476b9db61c5ffa916334 2023-05-15T15:16:06+02:00 Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children Cedar L. Mitchell Billy Ngasala Mark M. Janko Frank Chacky Jessie K. Edwards Brian W. Pence Ally Mohamed Lwidiko E. Mhamilawa Twilumba Makene Thwai Kyaw Fabrizio Molteni Humphrey Mkali Ssanyu Nyinondi Bilali Kabula Naomi Serbantez Erin L. Eckert Chonge Kitojo Erik Reaves Michael Emch Jonathan J. Juliano 2022-03-01T00:00:00Z https://doi.org/10.1186/s12936-022-04107-8 https://doaj.org/article/d059fd4d0706476b9db61c5ffa916334 EN eng BMC https://doi.org/10.1186/s12936-022-04107-8 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-022-04107-8 1475-2875 https://doaj.org/article/d059fd4d0706476b9db61c5ffa916334 Malaria Journal, Vol 21, Iss 1, Pp 1-10 (2022) Land cover Transmission intensity Malaria Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2022 ftdoajarticles https://doi.org/10.1186/s12936-022-04107-8 2022-12-31T15:40:32Z Abstract Background Transmission of malaria in sub-Saharan Africa has become increasingly stratified following decades of malaria control interventions. The extent to which environmental and land cover risk factors for malaria may differ across distinct strata of transmission intensity is not well known and could provide actionable targets to maximize the success of malaria control efforts. Methods This study used cross-sectional malaria survey data from a nationally representative cohort of school-aged children in Tanzania, and satellite-derived measures for environmental features and land cover. Hierarchical logistic regression models were applied to evaluate associations between land cover and malaria prevalence within three distinct strata of transmission intensity: low and unstable, moderate and seasonal, and high and perennial. Results In areas with low malaria transmission, each 10-percentage point increase in cropland cover was associated with an increase in malaria prevalence odds of 2.44 (95% UI: 1.27, 5.11). However, at moderate and higher levels of transmission intensity, no association between cropland cover and malaria prevalence was detected. Small associations were observed between greater grassland cover and greater malaria prevalence in high intensity settings (prevalence odds ratio (POR): 1.10, 95% UI: 1.00, 1.21), and between greater forest cover and reduced malaria prevalence in low transmission areas (POR: 0.74, 95% UI: 0.51, 1.03), however the uncertainty intervals of both estimates included the null. Conclusions The intensity of malaria transmission appears to modify relationships between land cover and malaria prevalence among school-aged children in Tanzania. In particular, greater cropland cover was positively associated with increased malaria prevalence in areas with low transmission intensity and presents an actionable target for environmental vector control interventions to complement current malaria control activities. As areas are nearing malaria elimination, it is important to ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 21 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Land cover Transmission intensity Malaria Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Land cover Transmission intensity Malaria Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Cedar L. Mitchell Billy Ngasala Mark M. Janko Frank Chacky Jessie K. Edwards Brian W. Pence Ally Mohamed Lwidiko E. Mhamilawa Twilumba Makene Thwai Kyaw Fabrizio Molteni Humphrey Mkali Ssanyu Nyinondi Bilali Kabula Naomi Serbantez Erin L. Eckert Chonge Kitojo Erik Reaves Michael Emch Jonathan J. Juliano Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children |
topic_facet |
Land cover Transmission intensity Malaria Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background Transmission of malaria in sub-Saharan Africa has become increasingly stratified following decades of malaria control interventions. The extent to which environmental and land cover risk factors for malaria may differ across distinct strata of transmission intensity is not well known and could provide actionable targets to maximize the success of malaria control efforts. Methods This study used cross-sectional malaria survey data from a nationally representative cohort of school-aged children in Tanzania, and satellite-derived measures for environmental features and land cover. Hierarchical logistic regression models were applied to evaluate associations between land cover and malaria prevalence within three distinct strata of transmission intensity: low and unstable, moderate and seasonal, and high and perennial. Results In areas with low malaria transmission, each 10-percentage point increase in cropland cover was associated with an increase in malaria prevalence odds of 2.44 (95% UI: 1.27, 5.11). However, at moderate and higher levels of transmission intensity, no association between cropland cover and malaria prevalence was detected. Small associations were observed between greater grassland cover and greater malaria prevalence in high intensity settings (prevalence odds ratio (POR): 1.10, 95% UI: 1.00, 1.21), and between greater forest cover and reduced malaria prevalence in low transmission areas (POR: 0.74, 95% UI: 0.51, 1.03), however the uncertainty intervals of both estimates included the null. Conclusions The intensity of malaria transmission appears to modify relationships between land cover and malaria prevalence among school-aged children in Tanzania. In particular, greater cropland cover was positively associated with increased malaria prevalence in areas with low transmission intensity and presents an actionable target for environmental vector control interventions to complement current malaria control activities. As areas are nearing malaria elimination, it is important to ... |
format |
Article in Journal/Newspaper |
author |
Cedar L. Mitchell Billy Ngasala Mark M. Janko Frank Chacky Jessie K. Edwards Brian W. Pence Ally Mohamed Lwidiko E. Mhamilawa Twilumba Makene Thwai Kyaw Fabrizio Molteni Humphrey Mkali Ssanyu Nyinondi Bilali Kabula Naomi Serbantez Erin L. Eckert Chonge Kitojo Erik Reaves Michael Emch Jonathan J. Juliano |
author_facet |
Cedar L. Mitchell Billy Ngasala Mark M. Janko Frank Chacky Jessie K. Edwards Brian W. Pence Ally Mohamed Lwidiko E. Mhamilawa Twilumba Makene Thwai Kyaw Fabrizio Molteni Humphrey Mkali Ssanyu Nyinondi Bilali Kabula Naomi Serbantez Erin L. Eckert Chonge Kitojo Erik Reaves Michael Emch Jonathan J. Juliano |
author_sort |
Cedar L. Mitchell |
title |
Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children |
title_short |
Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children |
title_full |
Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children |
title_fullStr |
Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children |
title_full_unstemmed |
Evaluating malaria prevalence and land cover across varying transmission intensity in Tanzania using a cross-sectional survey of school-aged children |
title_sort |
evaluating malaria prevalence and land cover across varying transmission intensity in tanzania using a cross-sectional survey of school-aged children |
publisher |
BMC |
publishDate |
2022 |
url |
https://doi.org/10.1186/s12936-022-04107-8 https://doaj.org/article/d059fd4d0706476b9db61c5ffa916334 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 21, Iss 1, Pp 1-10 (2022) |
op_relation |
https://doi.org/10.1186/s12936-022-04107-8 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-022-04107-8 1475-2875 https://doaj.org/article/d059fd4d0706476b9db61c5ffa916334 |
op_doi |
https://doi.org/10.1186/s12936-022-04107-8 |
container_title |
Malaria Journal |
container_volume |
21 |
container_issue |
1 |
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1766346403585458176 |