Predictores clínicos de bacteriemia en adultos inmunocompetentes hospitalizados por neumonía adquirida en la comunidad / Clinical predictors of bacteremia in immunocompetent adult patients hospitalized for community-acquired pneumonia
Rev. méd. Chile
; 143(5): 553-561, tab
Article
in Es
| LILACS
| ID: lil-751699
Responsible library:
CL1.1
ABSTRACT
Background:
The clinical usefulness of blood cultures in the management of patients hospitalized with community-acquired pneumonia (CAP) is controversial.Aim:
To determine clinical predictors of bacteremia in a cohort of adult patients hospitalized for community-acquired pneumonia. Material andMethods:
A prospective cohort of 605 immunocompetent adult patients aged 16 to 101 years (54% male) hospitalized for CAP was studied. The clinical and laboratory variables measured at admission were associated with the risk of bacteremia by univariate and multivariate analysis using logistic regression models.Results:
Seventy seven percent of patients had comorbidities, median hospital stay was 9 days, 7.6% died in hospital and 10.7% at 30 days. The yield of the blood cultures was 12.6% (S. pneumoniae in 69 patients, H. influenzae in 3, Gram negative bacteria in three and S. aureus in one). These results modified the initial antimicrobial treatment in one case (0.2%). In a multivariate analysis, clinical and laboratory variables associated with increased risk of bacteremia were low diastolic blood pressure (Odds ratio (OR) 1.85, 95% confidence intervals (CI) 1.02 to 3.36, p < 0.05), leukocytosis e" 15,000/mm³ (OR 2.18, 95% CI 1.22 to 3.88, p < 0.009), serum urea nitrogen e" 30 mg/dL (OR 2.23, 95% CI 1.22 to 4.05, p < 0.009) and serum C-reactive protein e" 30 mg/dL (OR 2.20, 95% CI 1.22 to 3.97, p < 0.01). Antimicrobial use before hospital admission significantly decreased the blood culture yield (OR 0.14, 95% CI 0.04 to 0.46, p < 0.002).Conclusions:
Blood cultures do not contribute significantly to the initial management of patients hospitalized for community-acquired pneumonia. The main clinical predictors of bacteremia were antibiotic use, hypotension, renal dysfunction and systemic inflammation.Key words
Full text:
1
Collection:
01-internacional
Database:
LILACS
Main subject:
Bacteremia
/
Pneumonia, Bacterial
Type of study:
Diagnostic_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limits:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
Language:
Es
Journal:
Rev. méd. Chile
Journal subject:
MEDICINA
Year:
2015
Document type:
Article
Affiliation country: