Implications of environmental and pathogen-specific determinants on clinical presentations and disease outcome in melioidosis patients.

Abstract:

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 BimABm 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.

journal_name

PLoS Negl Trop Dis

authors

Shaw T,Tellapragada C,Kamath A,Kalwaje Eshwara V,Mukhopadhyay C

doi

10.1371/journal.pntd.0007312

subject

Has Abstract

pub_date

2019-05-15 00:00:00

pages

e0007312

issue

5

eissn

1935-2727

issn

1935-2735

pii

PNTD-D-18-01856

journal_volume

13

pub_type

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