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BMC Infect Dis ; 22(1): 442, 2022 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-35534798

RESUMO

BACKGROUND: Legionella-related community acquired pneumonia (CAP) is a disease with an increasing incidence and a high mortality rate, especially if empirical antibiotic therapy is inadequate. Antibiotic treatment highly relies on clinical symptoms, although proven non-specific, because currently available diagnostic techniques provide insufficient accuracy for detecting Legionella CAP on admission. This study validates a diagnostic scoring system for detection of Legionella-related CAP, based on six items on admission (Legionella prediction score). METHODS: We included patients with Legionella-related CAP admitted to five large Dutch hospitals between 2006 and 2016. Controls were non-Legionella-related CAP patients. The following six conditions were rewarded one point if present: fever > 39.4 °C; dry cough; hyponatremia (sodium) < 133 mmol/L; lactate dehydrogenase (LDH) > 225 mmol/L; C-reactive protein (CRP) > 187 mg/L and platelet count < 171 × 109/L. The accuracy of the prediction score was assessed by calculating the area under the curve (AUC) through logistic regression analysis. RESULTS: We included 131 cases and 160 controls. A score of 0 occurred in non-Legionella-related CAP patients only, a score of 5 and 6 in Legionella-related CAP patients only. A cut-off ≥ 4 resulted in a sensitivity of 58.8% and a specificity of 93.1%. The AUC was 0.89 (95% CI 0.86-0.93). The strongest predictors were elevated LDH, elevated CRP and hyponatremia. CONCLUSIONS: This multi-centre study validates the Legionella prediction score, an easily applicable diagnostic scoring system, in a large group of patients and finds high diagnostic accuracy. The score shows promise for future prospective validation and could contribute to targeted antibiotic treatment of suspected Legionella CAP.


Assuntos
Infecções Comunitárias Adquiridas , Hiponatremia , Legionella pneumophila , Legionella , Doença dos Legionários , Pneumonia , Antibacterianos/uso terapêutico , Infecções Comunitárias Adquiridas/diagnóstico , Infecções Comunitárias Adquiridas/tratamento farmacológico , Humanos , L-Lactato Desidrogenase , Doença dos Legionários/diagnóstico , Doença dos Legionários/tratamento farmacológico , Pneumonia/diagnóstico , Pneumonia/tratamento farmacológico
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