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Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients
BACKGROUND: Melioidosis is gaining recognition as an emerging infectious disease with diverse clinical manifestations and high-case fatality rates worldwide. However, the molecular epidemiology of the disease outside the endemic regions such as northeast part of Thailand and northern Australia remai...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6538188/ https://www.ncbi.nlm.nih.gov/pubmed/31091290 http://dx.doi.org/10.1371/journal.pntd.0007312 |
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author | Shaw, Tushar Tellapragada, Chaitanya Kamath, Asha Kalwaje Eshwara, Vandana Mukhopadhyay, Chiranjay |
author_facet | Shaw, Tushar Tellapragada, Chaitanya Kamath, Asha Kalwaje Eshwara, Vandana Mukhopadhyay, Chiranjay |
author_sort | Shaw, Tushar |
collection | PubMed |
description | BACKGROUND: Melioidosis is gaining recognition as an emerging infectious disease with diverse clinical manifestations and high-case fatality rates worldwide. However, the molecular epidemiology of the disease outside the endemic regions such as northeast part of Thailand and northern Australia remains unclear. METHODOLOGY/PRINCIPAL FINDINGS: Clinical data and B. pseudomallei isolates obtained from 199 culture-confirmed cases of melioidosis diagnosed during 2006–2016 in South India were used to elucidate the host and pathogen specific variable virulence determinants associated with clinical presentations and disease outcome. Further, we determined the temporal variations and the influence of ecological factors on B.pseudomallei Lipopolysaccharide (LPS) genotypes causing infections. Severe forms of the disease were observed amongst 169 (85%) patients. Renal dysfunction and infection due to B.pseudomallei harboring BimA(Bm) variant had significant associations with severe forms of the disease. Diabetes mellitus, septicemic melioidosis and infection due to LPSB genotype were independent risk factors for mortality. LPSB (74%) and LPSA (20.6%) were the prevalent genotypes causing infections. Both genotypes demonstrated temporal variations and had significant correlations with rainfall and humidity. CONCLUSION/SIGNIFICANCE: Our study findings suggest that the pathogen specific virulence traits under the influence of ecological factors are the key drivers for geographical variations in the molecular epidemiology of melioidosis. |
format | Online Article Text |
id | pubmed-6538188 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-65381882019-06-05 Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients Shaw, Tushar Tellapragada, Chaitanya Kamath, Asha Kalwaje Eshwara, Vandana Mukhopadhyay, Chiranjay PLoS Negl Trop Dis Research Article BACKGROUND: Melioidosis is gaining recognition as an emerging infectious disease with diverse clinical manifestations and high-case fatality rates worldwide. However, the molecular epidemiology of the disease outside the endemic regions such as northeast part of Thailand and northern Australia remains unclear. METHODOLOGY/PRINCIPAL FINDINGS: Clinical data and B. pseudomallei isolates obtained from 199 culture-confirmed cases of melioidosis diagnosed during 2006–2016 in South India were used to elucidate the host and pathogen specific variable virulence determinants associated with clinical presentations and disease outcome. Further, we determined the temporal variations and the influence of ecological factors on B.pseudomallei Lipopolysaccharide (LPS) genotypes causing infections. Severe forms of the disease were observed amongst 169 (85%) patients. Renal dysfunction and infection due to B.pseudomallei harboring BimA(Bm) variant had significant associations with severe forms of the disease. Diabetes mellitus, septicemic melioidosis and infection due to LPSB genotype were independent risk factors for mortality. LPSB (74%) and LPSA (20.6%) were the prevalent genotypes causing infections. Both genotypes demonstrated temporal variations and had significant correlations with rainfall and humidity. CONCLUSION/SIGNIFICANCE: Our study findings suggest that the pathogen specific virulence traits under the influence of ecological factors are the key drivers for geographical variations in the molecular epidemiology of melioidosis. Public Library of Science 2019-05-15 /pmc/articles/PMC6538188/ /pubmed/31091290 http://dx.doi.org/10.1371/journal.pntd.0007312 Text en © 2019 Shaw et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Shaw, Tushar Tellapragada, Chaitanya Kamath, Asha Kalwaje Eshwara, Vandana Mukhopadhyay, Chiranjay Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
title | Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
title_full | Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
title_fullStr | Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
title_full_unstemmed | Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
title_short | Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
title_sort | implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6538188/ https://www.ncbi.nlm.nih.gov/pubmed/31091290 http://dx.doi.org/10.1371/journal.pntd.0007312 |
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