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Clinical items not helpful in differentiating viral from bacterial lower respiratory tract infections in general practice. 2005

R M Hopstaken, and E E Stobberingh, and J A Knottnerus, and J W M Muris, and P Nelemans, and P E L M Rinkens, and G J Dinant
Department of General Practice, Maastricht University, Care and Public Health Research Institute, PO Box 616, Maastricht 6200 MD, The Netherlands. rogier.hopstaken@hag.unimaas.nl

OBJECTIVE Incorrect and unnecessary antibiotic prescribing enhancing bacterial resistance rates might be reduced if viral and bacterial lower respiratory tract infections (LRTI) could be differentiated clinically. Whether this is possible is often doubted but has rarely been studied in general practice. METHODS This was an observational cohort study in 15 general practice surgeries in the Netherlands. RESULTS Etiologic diagnoses were obtained in 112 of 234 patients with complete data (48%). Viral pathogens were found as often as bacterial pathogens. Haemophilus (para-) influenzae was most frequently found. None of the symptoms and signs correlated statistically significantly with viral or bacterial LRTI. Erythrocyte sedimentation rate >50 (odds ratio [OR] 2.3-3.3) and C-reactive protein (CRP) >20 (OR 2.1-4.6) were independent predictors for viral LRTI and bacterial LRTI when compared with microbiologically unexplained LRTI. CONCLUSIONS Extensive history-taking and physical examination did not provide items that predict viral or bacterial LRTI in adult patients in daily general practice. We could not confirm CRP to differentiate between viral and bacterial LRTI.

UI MeSH Term Description Entries
D007958 Leukocyte Count The number of WHITE BLOOD CELLS per unit volume in venous BLOOD. A differential leukocyte count measures the relative numbers of the different types of white cells. Blood Cell Count, White,Differential Leukocyte Count,Leukocyte Count, Differential,Leukocyte Number,White Blood Cell Count,Count, Differential Leukocyte,Count, Leukocyte,Counts, Differential Leukocyte,Counts, Leukocyte,Differential Leukocyte Counts,Leukocyte Counts,Leukocyte Counts, Differential,Leukocyte Numbers,Number, Leukocyte,Numbers, Leukocyte
D008171 Lung Diseases Pathological processes involving any part of the LUNG. Pulmonary Diseases,Disease, Pulmonary,Diseases, Pulmonary,Pulmonary Disease,Disease, Lung,Diseases, Lung,Lung Disease
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011320 Primary Health Care Care which provides integrated, accessible health care services by clinicians who are accountable for addressing a large majority of personal health care needs, developing a sustained partnership with patients, and practicing in the context of family and community. (JAMA 1995;273(3):192) Primary Care,Primary Healthcare,Care, Primary,Care, Primary Health,Health Care, Primary,Healthcare, Primary
D001799 Blood Sedimentation Measurement of rate of settling of ERYTHROCYTES in blood. Erythrocyte Sedimentation,Erythrocyte Sedimentation Rate,Erythrocyte Sedimentation Rates,Rate, Erythrocyte Sedimentation,Rates, Erythrocyte Sedimentation,Sedimentation Rate, Erythrocyte,Sedimentation Rates, Erythrocyte,Sedimentation, Blood,Sedimentation, Erythrocyte
D002097 C-Reactive Protein A plasma protein that circulates in increased amounts during inflammation and after tissue damage. C-Reactive Protein measured by more sensitive methods often for coronary heart disease risk assessment is referred to as High Sensitivity C-Reactive Protein (hs-CRP). High Sensitivity C-Reactive Protein,hs-CRP,hsCRP,C Reactive Protein,High Sensitivity C Reactive Protein
D003937 Diagnosis, Differential Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures. Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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