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Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study

BACKGROUND: The trend analysis of malaria data from health facilities is useful for understanding dynamics of malaria epidemiology and inform for future malaria control planning. Changes in clinical malaria characteristics, like gender and age distribution are good indicators of declining malaria tr...

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Autores principales: Hawaria, Dawit, Getachew, Hallelujah, Zhong, Guofa, Demissew, Assalif, Habitamu, Kasahun, Raya, Beka, Lee, Ming-Chieh, Yewhalaw, Delenasaw, Yan, Guiyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480840/
https://www.ncbi.nlm.nih.gov/pubmed/31014319
http://dx.doi.org/10.1186/s12936-019-2777-z
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author Hawaria, Dawit
Getachew, Hallelujah
Zhong, Guofa
Demissew, Assalif
Habitamu, Kasahun
Raya, Beka
Lee, Ming-Chieh
Yewhalaw, Delenasaw
Yan, Guiyun
author_facet Hawaria, Dawit
Getachew, Hallelujah
Zhong, Guofa
Demissew, Assalif
Habitamu, Kasahun
Raya, Beka
Lee, Ming-Chieh
Yewhalaw, Delenasaw
Yan, Guiyun
author_sort Hawaria, Dawit
collection PubMed
description BACKGROUND: The trend analysis of malaria data from health facilities is useful for understanding dynamics of malaria epidemiology and inform for future malaria control planning. Changes in clinical malaria characteristics, like gender and age distribution are good indicators of declining malaria transmission. This study was conducted to determine the malaria trend at Arjo-Didessa sugar development site and its vicinity, southwest Ethiopia, from 2008 to 2017. METHODS: Monthly malaria confirmed case data from 2008 to 2017 was extracted from 11 health facilities based on clinical registers at Arjo sugar development site and its vicinity, southwest Ethiopia. Both positivity rate and malaria incidence rate were calculated. Changes in malaria parasite species and seasonality were analysed; age structure and gender distribution were compared between different study periods. Trend in malaria incidence and climatic impact were analysed and past LLIN and IRS campaigns were used as dynamics modifier. RESULTS: Over a period of 10 years, 54,020 blood film were collected for malaria diagnosis in the health facilities at the area, of which 18,049 (33.4%) were confirmed malaria cases by both microscopically and RDT. Plasmodium falciparum, Plasmodium vivax, and mixed infection (P. falciparum and P. vivax) accounted for 8660 (48%), 7649 (42.4%), and 1740 (9.6%) of the malaria cases, respectively. The study also revealed that P. vivax was the predominant over P. falciparum for 4 years (2010, 2014, 2015 and 2016). There was a remarkable reduction of overall malaria infection during the 10 years. Malaria has been reported in all age groups, but age distribution showed that vast majority of cases were adults age 15 years and above 13,305 (73.7%). In all age groups, males were more significantly affected than females (χ(2) = 133.0, df = 2, P < 0.0001). Moreover, malaria positivity rate showed a strong seasonality (χ(2) = 777.55, df = 11, P < 0.0001). However, malaria cases were reported in all seasons across 10 years in the study area. CONCLUSION: In general, malaria positivity showed a declining trend over 10 years period in the area. However, current prevalence shows it is public health burden and needs attention for further intensification of interventions. In the study area, both P. falciparum and P. vivax co-exist and P. vivax is more prevalent than P. falciparum in almost half of the years. Therefore, malaria interventions should be strengthened in the study area. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12936-019-2777-z) contains supplementary material, which is available to authorized users.
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spelling pubmed-64808402019-05-02 Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study Hawaria, Dawit Getachew, Hallelujah Zhong, Guofa Demissew, Assalif Habitamu, Kasahun Raya, Beka Lee, Ming-Chieh Yewhalaw, Delenasaw Yan, Guiyun Malar J Research BACKGROUND: The trend analysis of malaria data from health facilities is useful for understanding dynamics of malaria epidemiology and inform for future malaria control planning. Changes in clinical malaria characteristics, like gender and age distribution are good indicators of declining malaria transmission. This study was conducted to determine the malaria trend at Arjo-Didessa sugar development site and its vicinity, southwest Ethiopia, from 2008 to 2017. METHODS: Monthly malaria confirmed case data from 2008 to 2017 was extracted from 11 health facilities based on clinical registers at Arjo sugar development site and its vicinity, southwest Ethiopia. Both positivity rate and malaria incidence rate were calculated. Changes in malaria parasite species and seasonality were analysed; age structure and gender distribution were compared between different study periods. Trend in malaria incidence and climatic impact were analysed and past LLIN and IRS campaigns were used as dynamics modifier. RESULTS: Over a period of 10 years, 54,020 blood film were collected for malaria diagnosis in the health facilities at the area, of which 18,049 (33.4%) were confirmed malaria cases by both microscopically and RDT. Plasmodium falciparum, Plasmodium vivax, and mixed infection (P. falciparum and P. vivax) accounted for 8660 (48%), 7649 (42.4%), and 1740 (9.6%) of the malaria cases, respectively. The study also revealed that P. vivax was the predominant over P. falciparum for 4 years (2010, 2014, 2015 and 2016). There was a remarkable reduction of overall malaria infection during the 10 years. Malaria has been reported in all age groups, but age distribution showed that vast majority of cases were adults age 15 years and above 13,305 (73.7%). In all age groups, males were more significantly affected than females (χ(2) = 133.0, df = 2, P < 0.0001). Moreover, malaria positivity rate showed a strong seasonality (χ(2) = 777.55, df = 11, P < 0.0001). However, malaria cases were reported in all seasons across 10 years in the study area. CONCLUSION: In general, malaria positivity showed a declining trend over 10 years period in the area. However, current prevalence shows it is public health burden and needs attention for further intensification of interventions. In the study area, both P. falciparum and P. vivax co-exist and P. vivax is more prevalent than P. falciparum in almost half of the years. Therefore, malaria interventions should be strengthened in the study area. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12936-019-2777-z) contains supplementary material, which is available to authorized users. BioMed Central 2019-04-24 /pmc/articles/PMC6480840/ /pubmed/31014319 http://dx.doi.org/10.1186/s12936-019-2777-z Text en © The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Hawaria, Dawit
Getachew, Hallelujah
Zhong, Guofa
Demissew, Assalif
Habitamu, Kasahun
Raya, Beka
Lee, Ming-Chieh
Yewhalaw, Delenasaw
Yan, Guiyun
Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study
title Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study
title_full Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study
title_fullStr Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study
title_full_unstemmed Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study
title_short Ten years malaria trend at Arjo-Didessa sugar development site and its vicinity, Southwest Ethiopia: a retrospective study
title_sort ten years malaria trend at arjo-didessa sugar development site and its vicinity, southwest ethiopia: a retrospective study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480840/
https://www.ncbi.nlm.nih.gov/pubmed/31014319
http://dx.doi.org/10.1186/s12936-019-2777-z
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