Increased Incidence of Legionellosis after Improved Diagnostic Methods, New Zealand, 2000–2020

Graham, Frances F.; Harte, David; Zhang, Jane; Fyfe, Caroline; Baker, Michael.G.

doi:10.3201/eid2906.221598

i

Increased Incidence of Legionellosis after Improved Diagnostic Methods, New Zealand, 2000–2020

Supporting Files Public Domain

6 2023
By Graham, Frances F. ; Harte, David ; Zhang, Jane ; ...

File Language:

English

Details

Alternative Title:

Emerg Infect Dis
Personal Author:

Graham, Frances F. ; Harte, David ; Zhang, Jane ; Fyfe, Caroline ; Baker, Michael.G.
Description:

Legionellosis, notably Legionnaires' disease, is recognized globally and in New Zealand (Aotearoa) as a major cause of community-acquired pneumonia. We analyzed the temporal, geographic, and demographic epidemiology and microbiology of Legionnaires' disease in New Zealand by using notification and laboratory-based surveillance data for 2000‒2020. We used Poisson regression models to estimate incidence rate ratios and 95% CIs to compare demographic and organism trends over 2 time periods (2000-2009 and 2010-2020). The mean annual incidence rate increased from 1.6 cases/100,000 population for 2000-2009 to 3.9 cases/100,000 population for 2010-2020. This increase corresponded with a change in diagnostic testing from predominantly serology with some culture to almost entirely molecular methods using PCR. There was also a marked shift in the identified dominant causative organism, from Legionella pneumophila to L. longbeachae. Surveillance for legionellosis could be further enhanced by greater use of molecular typing of isolates.
Subjects:

Bacteria Epidemiology Humans Improved Diagnostic Methods Incidence Increased Incidence Increased Incidence Of Legionellosis After Improved Diagnostic Methods, New Zealand, 2000–2020 Legionella Legionella Pneumophila Legionellosis Legionnaires' Disease Legionnaires’ Disease New Zealand Research
Source:

Emerg Infect Dis. 2023; 29(6):1173-1182
Pubmed ID:

37209673
Pubmed Central ID:

PMC10202871
Document Type:

Journal Article
Volume:

29
Issue:

6
Collection(s):

Emerging Infectious Diseases
Main Document Checksum:

urn:sha256:38cb9718845cc2df440ceba59e4c60ceb158e35b416290f1152909ed4da6ce29
Download URL:

https://stacks.cdc.gov/view/cdc/129699/cdc_129699_DS1.pdf
File Type:

[PDF - 1.68 MB ]

File Language:

English

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