Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study
Summary: Background: The classic geographical range of histoplasmosis in North America primarily includes the states and provinces adjacent to the Ohio, Mississippi, and St Lawrence riverways. Although Alberta, Canada is not typically considered a region of risk for histoplasmosis, cases with suspe...
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doaj-2135cf99b58c4da09a60c151df26fe352021-05-06T04:25:41ZengElsevierThe Lancet Microbe2666-52472021-05-0125e191e197Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic studyTanis C Dingle, PhD0Matthew A Croxen, PhD1Sumana Fathima, MPH2Sandy Shokoples, MSc3Ashlesha Sonpar, MD4Lynora Saxinger, MD5Ilan S Schwartz, MD6Alberta Precision Laboratories, ProvLab, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; Correspondence to: Dr Tanis C Dingle, Alberta Precision Laboratories, ProvLab, Edmonton, AB T6G 2J2, CanadaAlberta Precision Laboratories, ProvLab, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, CanadaMinistry of Health, Government of Alberta, Edmonton, AB, CanadaAlberta Precision Laboratories, ProvLab, Edmonton, AB, CanadaDivision of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, AB, CanadaDivision of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, AB, CanadaDivision of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, AB, CanadaSummary: Background: The classic geographical range of histoplasmosis in North America primarily includes the states and provinces adjacent to the Ohio, Mississippi, and St Lawrence riverways. Although Alberta, Canada is not typically considered a region of risk for histoplasmosis, cases with suspected local acquisition have been reported. We aimed to investigate the epidemiology and geographical distribution of cases of histoplasmosis in Alberta to assess evidence for local acquisition of infections, using genomic analysis for corroboration. Methods: We did an epidemiological and genomic investigation, in which laboratory-confirmed cases of histoplasmosis were reviewed in Alberta from 2011, when the disease became reportable, until 2018. We used data attained from Alberta Health. Travel and exposure histories and clinical features were reviewed. Definite local acquisition was defined as a case without previous travel outside Alberta or associated with a common-source outbreak within the province, whereas probable local acquisition was a sporadic case with travel outside Alberta but compelling local exposures. Genomes of selected case isolates were analysed, including those from cases suspected to have been locally acquired and imported. Findings: Between Jan 1, 2011, and June 30, 2018, 45 cases of histoplasmosis were identified. Participants had a median age of 53 years (range 17–77) and 32 [71%] were male. Among 34 patients with documented travel histories, ten (29%) had never left the province. 11 cases were of definite local acquisition, including eight cases from three common-source outbreaks and three sporadic cases in patients who had never travelled outside Alberta. The common-source outbreaks all involved exposure to bats or their droppings in chimneys or attics of private dwellings or churches. Four patients had travelled outside Alberta but compelling evidence was seen for local exposure to bat guano. Genome sequencing showed that isolates from cases of definite and probable local acquisition clustered together and were genetically distinct from isolates from suspected imported cases and other published isolates. Interpretation: Using epidemiological and genomic analyses, we established that cases of histoplasmosis have been acquired in Alberta, thus expanding the geographical range of Histoplasma spp much further northwest than was previously appreciated. Histoplasmosis should be considered in patients with compatible symptoms outside areas of classic geographical risk. Funding: None.http://www.sciencedirect.com/science/article/pii/S2666524720302299 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tanis C Dingle, PhD Matthew A Croxen, PhD Sumana Fathima, MPH Sandy Shokoples, MSc Ashlesha Sonpar, MD Lynora Saxinger, MD Ilan S Schwartz, MD |
spellingShingle |
Tanis C Dingle, PhD Matthew A Croxen, PhD Sumana Fathima, MPH Sandy Shokoples, MSc Ashlesha Sonpar, MD Lynora Saxinger, MD Ilan S Schwartz, MD Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study The Lancet Microbe |
author_facet |
Tanis C Dingle, PhD Matthew A Croxen, PhD Sumana Fathima, MPH Sandy Shokoples, MSc Ashlesha Sonpar, MD Lynora Saxinger, MD Ilan S Schwartz, MD |
author_sort |
Tanis C Dingle, PhD |
title |
Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study |
title_short |
Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study |
title_full |
Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study |
title_fullStr |
Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study |
title_full_unstemmed |
Histoplasmosis acquired in Alberta, Canada: an epidemiological and genomic study |
title_sort |
histoplasmosis acquired in alberta, canada: an epidemiological and genomic study |
publisher |
Elsevier |
series |
The Lancet Microbe |
issn |
2666-5247 |
publishDate |
2021-05-01 |
description |
Summary: Background: The classic geographical range of histoplasmosis in North America primarily includes the states and provinces adjacent to the Ohio, Mississippi, and St Lawrence riverways. Although Alberta, Canada is not typically considered a region of risk for histoplasmosis, cases with suspected local acquisition have been reported. We aimed to investigate the epidemiology and geographical distribution of cases of histoplasmosis in Alberta to assess evidence for local acquisition of infections, using genomic analysis for corroboration. Methods: We did an epidemiological and genomic investigation, in which laboratory-confirmed cases of histoplasmosis were reviewed in Alberta from 2011, when the disease became reportable, until 2018. We used data attained from Alberta Health. Travel and exposure histories and clinical features were reviewed. Definite local acquisition was defined as a case without previous travel outside Alberta or associated with a common-source outbreak within the province, whereas probable local acquisition was a sporadic case with travel outside Alberta but compelling local exposures. Genomes of selected case isolates were analysed, including those from cases suspected to have been locally acquired and imported. Findings: Between Jan 1, 2011, and June 30, 2018, 45 cases of histoplasmosis were identified. Participants had a median age of 53 years (range 17–77) and 32 [71%] were male. Among 34 patients with documented travel histories, ten (29%) had never left the province. 11 cases were of definite local acquisition, including eight cases from three common-source outbreaks and three sporadic cases in patients who had never travelled outside Alberta. The common-source outbreaks all involved exposure to bats or their droppings in chimneys or attics of private dwellings or churches. Four patients had travelled outside Alberta but compelling evidence was seen for local exposure to bat guano. Genome sequencing showed that isolates from cases of definite and probable local acquisition clustered together and were genetically distinct from isolates from suspected imported cases and other published isolates. Interpretation: Using epidemiological and genomic analyses, we established that cases of histoplasmosis have been acquired in Alberta, thus expanding the geographical range of Histoplasma spp much further northwest than was previously appreciated. Histoplasmosis should be considered in patients with compatible symptoms outside areas of classic geographical risk. Funding: None. |
url |
http://www.sciencedirect.com/science/article/pii/S2666524720302299 |
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