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  Increase in surgical site infections caused by gram-negative bacteria in warmer temperatures: Results from a retrospective observational study

Aghdassi, S. J. S., Gastmeier, P., Hoffmann, P., Schwab, F. (2021): Increase in surgical site infections caused by gram-negative bacteria in warmer temperatures: Results from a retrospective observational study. - Infection Control and Hospital Epidemiology, 42, 4, 417-424.
https://doi.org/10.1017/ice.2020.463

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Aghdassi, Seven Johannes Sam1, Author
Gastmeier, Petra1, Author
Hoffmann, Peter2, Author              
Schwab, Frank1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Abstract: Objective: Surgical site infections (SSIs) occur more frequently during periods of warmer temperatures. We aimed to investigate for which pathogens this association is particularly strong. Design: A retrospective observational study was conducted. Methods: Data from the SSI-module of the German nosocomial infection surveillance system between 2000 and 2016 were linked with data from the German Meteorological Service. Patient- and procedure-related data were associated with monthly aggregated meteorological data. Due to high correlation with other meteorological parameters, we focused on the outside temperature. Adjusted odds ratios were calculated for SSI rates relating to temperature. SSIs were stratified by pathogen. A P value of <.05 was considered significant. Results: Altogether, 2,004,793 procedures resulting in 32,118 SSIs were included. Generally, warmer temperatures were associated with a higher SSI risk, especially for SSIs with gram-negative pathogens. This association was particularly prominent for Acinetobacter spp, Pseudomonas aeruginosa, and certain Enterobacteriaceae. Per additional 1°C, we observed a 6% increase in the SSI risk for Acinetobacter spp and a 4% increase for Enterobacter spp. Superficial SSIs with Acinetobacter spp were 10 times more likely to occur when comparing surgeries in months with mean temperatures of ≥20°C to mean temperatures of <5°C. Conclusions: Higher temperatures were associated with increased SSI rates caused by gram-negative bacteria. Future SSI prevention measures should consider this aspect. Underlying shifts in microbiome composition due to climate factors should be included in further analyses. Given the expected rise of global temperatures until the end of the century, this topic has relevance from multiple perspectives.

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 Dates: 2020-10-072021-04
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1017/ice.2020.463
PIKDOMAIN: RD2 - Climate Resilience
Organisational keyword: RD2 - Climate Resilience
Research topic keyword: Climate impacts
Research topic keyword: Health
Research topic keyword: Weather
Regional keyword: Germany
MDB-ID: yes - 3298
 Degree: -

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Title: Infection Control and Hospital Epidemiology
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 42 (4) Sequence Number: - Start / End Page: 417 - 424 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/infection-control-hospital-epidemiology
Publisher: Cambridge University Press