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Weather parameters and nosocomial bloodstream infection: a case-referent study

OBJECTIVE: To evaluate if temperature and humidity influenced the etiology of bloodstream infections in a hospital from 2005 to 2010. METHODS: The study had a case-referent design. Individual cases of bloodstream infections caused by specific groups or pathogens were compared with several references...

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Autores principales: Caldeira, Silvia Maria, da Cunha, Antonio Ribeiro, Akazawa, Renata Tamie, Moreira, Rayana Gonçalves, de Souza, Lenice do Rosário, Fortaleza, Carlos Magno Castelo Branco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Faculdade de Saúde Pública da Universidade de São Paulo 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4390072/
https://www.ncbi.nlm.nih.gov/pubmed/25830871
http://dx.doi.org/10.1590/S0034-8910.2015049005438
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author Caldeira, Silvia Maria
da Cunha, Antonio Ribeiro
Akazawa, Renata Tamie
Moreira, Rayana Gonçalves
de Souza, Lenice do Rosário
Fortaleza, Carlos Magno Castelo Branco
author_facet Caldeira, Silvia Maria
da Cunha, Antonio Ribeiro
Akazawa, Renata Tamie
Moreira, Rayana Gonçalves
de Souza, Lenice do Rosário
Fortaleza, Carlos Magno Castelo Branco
author_sort Caldeira, Silvia Maria
collection PubMed
description OBJECTIVE: To evaluate if temperature and humidity influenced the etiology of bloodstream infections in a hospital from 2005 to 2010. METHODS: The study had a case-referent design. Individual cases of bloodstream infections caused by specific groups or pathogens were compared with several references. In the first analysis, average temperature and humidity values for the seven days preceding collection of blood cultures were compared with an overall “seven-days moving average” for the study period. The second analysis included only patients with bloodstream infections. Several logistic regression models were used to compare different pathogens and groups with respect to the immediate weather parameters, adjusting for demographics, time, and unit of admission. RESULTS: Higher temperatures and humidity were related to the recovery of bacteria as a whole (versus fungi) and of gram-negative bacilli. In the multivariable models, temperature was positively associated with the recovery of gram-negative bacilli (OR = 1.14; 95%CI 1.10;1.19) or Acinetobacter baumannii (OR = 1.26; 95%CI 1.16;1.37), even after adjustment for demographic and admission data. An inverse association was identified for humidity. CONCLUSIONS: The study documented the impact of temperature and humidity on the incidence and etiology of bloodstream infections. The results correspond with those from ecological studies, indicating a higher incidence of gram-negative bacilli during warm seasons. These findings should guide policies directed at preventing and controlling healthcare-associated infections.
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spelling pubmed-43900722015-04-15 Weather parameters and nosocomial bloodstream infection: a case-referent study Caldeira, Silvia Maria da Cunha, Antonio Ribeiro Akazawa, Renata Tamie Moreira, Rayana Gonçalves de Souza, Lenice do Rosário Fortaleza, Carlos Magno Castelo Branco Rev Saude Publica Artigos Originais OBJECTIVE: To evaluate if temperature and humidity influenced the etiology of bloodstream infections in a hospital from 2005 to 2010. METHODS: The study had a case-referent design. Individual cases of bloodstream infections caused by specific groups or pathogens were compared with several references. In the first analysis, average temperature and humidity values for the seven days preceding collection of blood cultures were compared with an overall “seven-days moving average” for the study period. The second analysis included only patients with bloodstream infections. Several logistic regression models were used to compare different pathogens and groups with respect to the immediate weather parameters, adjusting for demographics, time, and unit of admission. RESULTS: Higher temperatures and humidity were related to the recovery of bacteria as a whole (versus fungi) and of gram-negative bacilli. In the multivariable models, temperature was positively associated with the recovery of gram-negative bacilli (OR = 1.14; 95%CI 1.10;1.19) or Acinetobacter baumannii (OR = 1.26; 95%CI 1.16;1.37), even after adjustment for demographic and admission data. An inverse association was identified for humidity. CONCLUSIONS: The study documented the impact of temperature and humidity on the incidence and etiology of bloodstream infections. The results correspond with those from ecological studies, indicating a higher incidence of gram-negative bacilli during warm seasons. These findings should guide policies directed at preventing and controlling healthcare-associated infections. Faculdade de Saúde Pública da Universidade de São Paulo 2015-03-25 2015 /pmc/articles/PMC4390072/ /pubmed/25830871 http://dx.doi.org/10.1590/S0034-8910.2015049005438 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Artigos Originais
Caldeira, Silvia Maria
da Cunha, Antonio Ribeiro
Akazawa, Renata Tamie
Moreira, Rayana Gonçalves
de Souza, Lenice do Rosário
Fortaleza, Carlos Magno Castelo Branco
Weather parameters and nosocomial bloodstream infection: a case-referent study
title Weather parameters and nosocomial bloodstream infection: a case-referent study
title_full Weather parameters and nosocomial bloodstream infection: a case-referent study
title_fullStr Weather parameters and nosocomial bloodstream infection: a case-referent study
title_full_unstemmed Weather parameters and nosocomial bloodstream infection: a case-referent study
title_short Weather parameters and nosocomial bloodstream infection: a case-referent study
title_sort weather parameters and nosocomial bloodstream infection: a case-referent study
topic Artigos Originais
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4390072/
https://www.ncbi.nlm.nih.gov/pubmed/25830871
http://dx.doi.org/10.1590/S0034-8910.2015049005438
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