Cargando…
Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast
BACKGROUND: Ivory Coast is a West African country with the highest reported cases of Buruli ulcer, a disabling subcutaneous infection due to Mycobacterium ulcerans. However, the prevalence of environmental M. ulcerans is poorly known in this country. METHODS: We collected 496 environmental specimens...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4794205/ https://www.ncbi.nlm.nih.gov/pubmed/26982581 http://dx.doi.org/10.1371/journal.pone.0151567 |
_version_ | 1782421453753286656 |
---|---|
author | Tian, Roger Bi Diangoné Niamké, Sébastian Tissot-Dupont, Hervé Drancourt, Michel |
author_facet | Tian, Roger Bi Diangoné Niamké, Sébastian Tissot-Dupont, Hervé Drancourt, Michel |
author_sort | Tian, Roger Bi Diangoné |
collection | PubMed |
description | BACKGROUND: Ivory Coast is a West African country with the highest reported cases of Buruli ulcer, a disabling subcutaneous infection due to Mycobacterium ulcerans. However, the prevalence of environmental M. ulcerans is poorly known in this country. METHODS: We collected 496 environmental specimens consisting of soil (n = 100), stagnant water (n = 200), plants (n = 100) and animal feces (n = 96) in Ivory Coast over five months in the dry and wet seasons in regions which are free of Buruli ulcer (control group A; 250 specimens) and in regions where the Buruli ulcer is endemic (group B; 246 specimens). After appropriate total DNA extraction incorporating an internal control, the M. ulcerans IS2404 and KR-B gene were amplified by real-time PCR in samples. In parallel, a calibration curve was done for M. ulcerans Agy99 IS2404 and KR-B gene. RESULTS: Of 460 samples free of PCR inhibition, a positive real-time PCR detection of insertion sequence IS2404 and KR-B gene was observed in 1/230 specimens in control group A versus 9/230 specimens in group B (P = 0.02; Fisher exact test). Positive specimens comprised seven stagnant water specimens, two feces specimens confirmed to be of Thryonomys swinderianus (agouti) origin by real-time PCR of the cytb gene; and one soil specimen. Extrapolation from the calibration curves indicated low inoculums ranging from 1 to 10(2) mycobacteria/mL. CONCLUSION: This study confirms the presence of M. ulcerans in the watery environment surrounding patients with Buruli ulcer in Ivory Coast. It suggests that the agouti, which is in close contacts with populations, could play a role in the environmental cycle of M. ulcerans, as previously suggested for the closely related possums in Australia. |
format | Online Article Text |
id | pubmed-4794205 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-47942052016-03-23 Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast Tian, Roger Bi Diangoné Niamké, Sébastian Tissot-Dupont, Hervé Drancourt, Michel PLoS One Research Article BACKGROUND: Ivory Coast is a West African country with the highest reported cases of Buruli ulcer, a disabling subcutaneous infection due to Mycobacterium ulcerans. However, the prevalence of environmental M. ulcerans is poorly known in this country. METHODS: We collected 496 environmental specimens consisting of soil (n = 100), stagnant water (n = 200), plants (n = 100) and animal feces (n = 96) in Ivory Coast over five months in the dry and wet seasons in regions which are free of Buruli ulcer (control group A; 250 specimens) and in regions where the Buruli ulcer is endemic (group B; 246 specimens). After appropriate total DNA extraction incorporating an internal control, the M. ulcerans IS2404 and KR-B gene were amplified by real-time PCR in samples. In parallel, a calibration curve was done for M. ulcerans Agy99 IS2404 and KR-B gene. RESULTS: Of 460 samples free of PCR inhibition, a positive real-time PCR detection of insertion sequence IS2404 and KR-B gene was observed in 1/230 specimens in control group A versus 9/230 specimens in group B (P = 0.02; Fisher exact test). Positive specimens comprised seven stagnant water specimens, two feces specimens confirmed to be of Thryonomys swinderianus (agouti) origin by real-time PCR of the cytb gene; and one soil specimen. Extrapolation from the calibration curves indicated low inoculums ranging from 1 to 10(2) mycobacteria/mL. CONCLUSION: This study confirms the presence of M. ulcerans in the watery environment surrounding patients with Buruli ulcer in Ivory Coast. It suggests that the agouti, which is in close contacts with populations, could play a role in the environmental cycle of M. ulcerans, as previously suggested for the closely related possums in Australia. Public Library of Science 2016-03-16 /pmc/articles/PMC4794205/ /pubmed/26982581 http://dx.doi.org/10.1371/journal.pone.0151567 Text en © 2016 Tian 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 Tian, Roger Bi Diangoné Niamké, Sébastian Tissot-Dupont, Hervé Drancourt, Michel Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast |
title | Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast |
title_full | Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast |
title_fullStr | Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast |
title_full_unstemmed | Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast |
title_short | Detection of Mycobacterium ulcerans DNA in the Environment, Ivory Coast |
title_sort | detection of mycobacterium ulcerans dna in the environment, ivory coast |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4794205/ https://www.ncbi.nlm.nih.gov/pubmed/26982581 http://dx.doi.org/10.1371/journal.pone.0151567 |
work_keys_str_mv | AT tianrogerbidiangone detectionofmycobacteriumulceransdnaintheenvironmentivorycoast AT niamkesebastian detectionofmycobacteriumulceransdnaintheenvironmentivorycoast AT tissotdupontherve detectionofmycobacteriumulceransdnaintheenvironmentivorycoast AT drancourtmichel detectionofmycobacteriumulceransdnaintheenvironmentivorycoast |