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Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017

Leptospirosis in New Zealand has been strongly associated with animal-contact occupations and with serovars Hardjo and Pomona. However, recent data suggest changes in these patterns, hence, serovar-specific epidemiology of leptospirosis from 1999 to 2017 was investigated. The 19-year average annual...

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Autores principales: Nisa, Shahista, Wilkinson, David A., Angelin-Bonnet, Olivia, Paine, Shevaun, Cullen, Karen, Wight, Jackie, Baker, Michael G., Benschop, Jackie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602385/
https://www.ncbi.nlm.nih.gov/pubmed/33066613
http://dx.doi.org/10.3390/pathogens9100841
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author Nisa, Shahista
Wilkinson, David A.
Angelin-Bonnet, Olivia
Paine, Shevaun
Cullen, Karen
Wight, Jackie
Baker, Michael G.
Benschop, Jackie
author_facet Nisa, Shahista
Wilkinson, David A.
Angelin-Bonnet, Olivia
Paine, Shevaun
Cullen, Karen
Wight, Jackie
Baker, Michael G.
Benschop, Jackie
author_sort Nisa, Shahista
collection PubMed
description Leptospirosis in New Zealand has been strongly associated with animal-contact occupations and with serovars Hardjo and Pomona. However, recent data suggest changes in these patterns, hence, serovar-specific epidemiology of leptospirosis from 1999 to 2017 was investigated. The 19-year average annual incidence is 2.01/100,000. Early (1999–2007) and late (2008–2017) study period comparisons showed a significant increase in notifications with serovar Ballum (IRR: 1.59, 95% CI: 1.22–2.09) in all cases and serovar Tarassovi (IRR: 1.75, 95% CI: 1.13–2.78) in Europeans and a decrease in notifications with serovars Hardjo and Pomona in all cases. Incidences of Ballum peaked in winter, Hardjo peaked in spring and Tarassovi peaked in summer. Incidence was highest in Māori (2.24/100,000) with dominant serovars being Hardjo and Pomona. Stratification by occupation showed meat workers had the highest incidence of Hardjo (57.29/100,000) and Pomona (45.32/100,000), farmers had the highest incidence of Ballum (11.09/100,000) and dairy farmers had the highest incidence of Tarassovi (12.59/100,000). Spatial analysis showed predominance of Hardjo and Pomona in Hawke’s Bay, Ballum in West Coast and Northland and Tarassovi in Waikato, Taranaki and Northland. This study highlights the serovar-specific heterogeneity of human leptospirosis in New Zealand that should be considered when developing control and prevention strategies.
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spelling pubmed-76023852020-11-01 Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017 Nisa, Shahista Wilkinson, David A. Angelin-Bonnet, Olivia Paine, Shevaun Cullen, Karen Wight, Jackie Baker, Michael G. Benschop, Jackie Pathogens Article Leptospirosis in New Zealand has been strongly associated with animal-contact occupations and with serovars Hardjo and Pomona. However, recent data suggest changes in these patterns, hence, serovar-specific epidemiology of leptospirosis from 1999 to 2017 was investigated. The 19-year average annual incidence is 2.01/100,000. Early (1999–2007) and late (2008–2017) study period comparisons showed a significant increase in notifications with serovar Ballum (IRR: 1.59, 95% CI: 1.22–2.09) in all cases and serovar Tarassovi (IRR: 1.75, 95% CI: 1.13–2.78) in Europeans and a decrease in notifications with serovars Hardjo and Pomona in all cases. Incidences of Ballum peaked in winter, Hardjo peaked in spring and Tarassovi peaked in summer. Incidence was highest in Māori (2.24/100,000) with dominant serovars being Hardjo and Pomona. Stratification by occupation showed meat workers had the highest incidence of Hardjo (57.29/100,000) and Pomona (45.32/100,000), farmers had the highest incidence of Ballum (11.09/100,000) and dairy farmers had the highest incidence of Tarassovi (12.59/100,000). Spatial analysis showed predominance of Hardjo and Pomona in Hawke’s Bay, Ballum in West Coast and Northland and Tarassovi in Waikato, Taranaki and Northland. This study highlights the serovar-specific heterogeneity of human leptospirosis in New Zealand that should be considered when developing control and prevention strategies. MDPI 2020-10-14 /pmc/articles/PMC7602385/ /pubmed/33066613 http://dx.doi.org/10.3390/pathogens9100841 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nisa, Shahista
Wilkinson, David A.
Angelin-Bonnet, Olivia
Paine, Shevaun
Cullen, Karen
Wight, Jackie
Baker, Michael G.
Benschop, Jackie
Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017
title Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017
title_full Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017
title_fullStr Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017
title_full_unstemmed Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017
title_short Diverse Epidemiology of Leptospira Serovars Notified in New Zealand, 1999–2017
title_sort diverse epidemiology of leptospira serovars notified in new zealand, 1999–2017
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602385/
https://www.ncbi.nlm.nih.gov/pubmed/33066613
http://dx.doi.org/10.3390/pathogens9100841
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