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Free Content Case cluster shifting and contaminant source as determinants of melioidosis in Taiwan

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Objectives  To assess the geographical distribution of melioidosis contamination sources and the association between the location of melioidosis cases and positive sampling sites for Burkholderia pseudomallei in Taiwan.

Methods  Data on the location of melioidosis cases from 2002 to 2011 were combined with the geographical distribution of B. pseudomallei as indicated by the detection of specific flagella gene products measured from 2005 to 2011. Temporal and spatial analyses were used to determine the incidence, cluster shifts and associations between the two datasets.

Results  Melioidosis cases clustered in two ‘hot‐spot’ areas with incidence rates that were significantly higher than in neighbouring towns. The incidence rates in the northern area gradually decreased, while the rates in the southern area increased and were temporally associated with the appearance of B. pseudomallei‐specific flagella genes in water samples.

Conclusions  Melioidosis hot‐spot areas were present in Taiwan. Water contaminated with B. pseudomallei serves as a potential transmission vehicle and is correlated with an increase in melioidosis cases; this correlation was stronger than that for B. pseudomallei‐contaminated soil.
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Language: English

Document Type: Research Article

Affiliations: 1:  Department of Geosciences, Georgia State University, Atlanta, GA, USA 2:  Division of Infectious Diseases, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan 3:  Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan 4:  Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan

Publication date: August 1, 2012

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