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The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei
Burkholderia pseudomallei is the causative agent of melioidosis, which is a Gram negative, facultative intracellular bacterium. Disease is prevalent in SE Asia and in northern Australia, as well as in other tropical and subtropical regions. Recently, there is an increasing awareness of the importanc...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7932547/ https://www.ncbi.nlm.nih.gov/pubmed/33617546 http://dx.doi.org/10.1371/journal.pntd.0009016 |
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author | Nelson, Michelle Nunez, Alejandro Ngugi, Sarah A. Atkins, Timothy P. |
author_facet | Nelson, Michelle Nunez, Alejandro Ngugi, Sarah A. Atkins, Timothy P. |
author_sort | Nelson, Michelle |
collection | PubMed |
description | Burkholderia pseudomallei is the causative agent of melioidosis, which is a Gram negative, facultative intracellular bacterium. Disease is prevalent in SE Asia and in northern Australia, as well as in other tropical and subtropical regions. Recently, there is an increasing awareness of the importance of bacterial ingestion as a potential route of infection, particularly in cases of unexplained origin of the disease. The marmoset is a New World Monkey (NWM) species that is being developed as an alternative NHP model to complement the more traditionally used Old World Monkeys (OWM). Models have been developed for the traditional routes of disease acquisition, subcutaneous and inhalational. This manuscript details the development and characterisation of an ingestion model of melioidosis. Dose-ranging study assessed the lethality of B. pseudomallei and disease progression was assessed by euthanizing animals at predetermined time points, 12, 36, 48 and 54 hours post-challenge. Challenge doses of greater than 6.2 x 10(6) cfu resulted in an acute, lethal, febrile disease. Following challenge the lung was the first organ, outside of the gastrointestinal tract, to become colonised. Enteritis (duodenitis, ileitis and/or jejunitis) was observed in sections of the small intestine from animals that succumbed to disease. However, the most severe pathological features were observed in the mesenteric lymph nodes from these animals. These findings are consistent with lymphatic draining as route of dissemination. |
format | Online Article Text |
id | pubmed-7932547 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-79325472021-03-15 The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei Nelson, Michelle Nunez, Alejandro Ngugi, Sarah A. Atkins, Timothy P. PLoS Negl Trop Dis Research Article Burkholderia pseudomallei is the causative agent of melioidosis, which is a Gram negative, facultative intracellular bacterium. Disease is prevalent in SE Asia and in northern Australia, as well as in other tropical and subtropical regions. Recently, there is an increasing awareness of the importance of bacterial ingestion as a potential route of infection, particularly in cases of unexplained origin of the disease. The marmoset is a New World Monkey (NWM) species that is being developed as an alternative NHP model to complement the more traditionally used Old World Monkeys (OWM). Models have been developed for the traditional routes of disease acquisition, subcutaneous and inhalational. This manuscript details the development and characterisation of an ingestion model of melioidosis. Dose-ranging study assessed the lethality of B. pseudomallei and disease progression was assessed by euthanizing animals at predetermined time points, 12, 36, 48 and 54 hours post-challenge. Challenge doses of greater than 6.2 x 10(6) cfu resulted in an acute, lethal, febrile disease. Following challenge the lung was the first organ, outside of the gastrointestinal tract, to become colonised. Enteritis (duodenitis, ileitis and/or jejunitis) was observed in sections of the small intestine from animals that succumbed to disease. However, the most severe pathological features were observed in the mesenteric lymph nodes from these animals. These findings are consistent with lymphatic draining as route of dissemination. Public Library of Science 2021-02-22 /pmc/articles/PMC7932547/ /pubmed/33617546 http://dx.doi.org/10.1371/journal.pntd.0009016 Text en © 2021 Nelson 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 Nelson, Michelle Nunez, Alejandro Ngugi, Sarah A. Atkins, Timothy P. The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei |
title | The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei |
title_full | The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei |
title_fullStr | The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei |
title_full_unstemmed | The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei |
title_short | The lymphatic system as a potential mechanism of spread of melioidosis following ingestion of Burkholderia pseudomallei |
title_sort | lymphatic system as a potential mechanism of spread of melioidosis following ingestion of burkholderia pseudomallei |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7932547/ https://www.ncbi.nlm.nih.gov/pubmed/33617546 http://dx.doi.org/10.1371/journal.pntd.0009016 |
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