Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms

Abstract The development of visual tools for the timely identification of spatio-temporal clusters will assist in implementing control measures to prevent further damage. From January 2015 to June 2020, a total number of 1463 avian influenza outbreak farms were detected in Taiwan and further confirm...

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Autores principales:	Hong-Dar Isaac Wu, Day-Yu Chao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fdaf63b75d0f40599faa6826e5b4aac3
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spelling	oai:doaj.org-article:fdaf63b75d0f40599faa6826e5b4aac32021-11-21T12:23:18ZTwo-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms10.1038/s41598-021-01207-42045-2322https://doaj.org/article/fdaf63b75d0f40599faa6826e5b4aac32021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01207-4https://doaj.org/toc/2045-2322Abstract The development of visual tools for the timely identification of spatio-temporal clusters will assist in implementing control measures to prevent further damage. From January 2015 to June 2020, a total number of 1463 avian influenza outbreak farms were detected in Taiwan and further confirmed to be affected by highly pathogenic avian influenza subtype H5Nx. In this study, we adopted two common concepts of spatio-temporal clustering methods, the Knox test and scan statistics, with visual tools to explore the dynamic changes of clustering patterns. Since most (68.6%) of the outbreak farms were detected in 2015, only the data from 2015 was used in this study. The first two-stage algorithm performs the Knox test, which established a threshold of 7 days and identified 11 major clusters in the six counties of southwestern Taiwan, followed by the standard deviational ellipse (SDE) method implemented on each cluster to reveal the transmission direction. The second algorithm applies scan likelihood ratio statistics followed by AGC index to visualize the dynamic changes of the local aggregation pattern of disease clusters at the regional level. Compared to the one-stage aggregation approach, Knox-based and AGC mapping were more sensitive in small-scale spatio-temporal clustering.Hong-Dar Isaac WuDay-Yu ChaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hong-Dar Isaac Wu Day-Yu Chao Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
description	Abstract The development of visual tools for the timely identification of spatio-temporal clusters will assist in implementing control measures to prevent further damage. From January 2015 to June 2020, a total number of 1463 avian influenza outbreak farms were detected in Taiwan and further confirmed to be affected by highly pathogenic avian influenza subtype H5Nx. In this study, we adopted two common concepts of spatio-temporal clustering methods, the Knox test and scan statistics, with visual tools to explore the dynamic changes of clustering patterns. Since most (68.6%) of the outbreak farms were detected in 2015, only the data from 2015 was used in this study. The first two-stage algorithm performs the Knox test, which established a threshold of 7 days and identified 11 major clusters in the six counties of southwestern Taiwan, followed by the standard deviational ellipse (SDE) method implemented on each cluster to reveal the transmission direction. The second algorithm applies scan likelihood ratio statistics followed by AGC index to visualize the dynamic changes of the local aggregation pattern of disease clusters at the regional level. Compared to the one-stage aggregation approach, Knox-based and AGC mapping were more sensitive in small-scale spatio-temporal clustering.
format	article
author	Hong-Dar Isaac Wu Day-Yu Chao
author_facet	Hong-Dar Isaac Wu Day-Yu Chao
author_sort	Hong-Dar Isaac Wu
title	Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
title_short	Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
title_full	Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
title_fullStr	Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
title_full_unstemmed	Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
title_sort	two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fdaf63b75d0f40599faa6826e5b4aac3
work_keys_str_mv	AT hongdarisaacwu twostagealgorithmsforvisuallyexploringspatiotemporalclusteringofavianinfluenzavirusoutbreaksinpoultryfarms AT dayyuchao twostagealgorithmsforvisuallyexploringspatiotemporalclusteringofavianinfluenzavirusoutbreaksinpoultryfarms
_version_	1718419103404785664

Two-stage algorithms for visually exploring spatio-temporal clustering of avian influenza virus outbreaks in poultry farms

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