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Published on: May 6, 2014
Acute community-acquired pneumonia: current diagnosis and treatment
1cbryan@richmed.medpark.sc.edu
Abstract:
1. Diagnosis of acute community acquired pneumonia is based on the history, physical examination, and chest x-ray. With respect to diagnosis, the clinician should ask, (1) Is the problem pneumonia or something else? (2) Is the pneumonia often treated empirically with a macrolide (erythromycin, clarithromycin, or azithromycin), a "respiratory quinolone" (levofloxacin, moxifloxacin, gatifloxacin, or gemifloxacin) or doxycycline. 4. Concern has expressed that use of quinolones as monotherapy for pneumonia may promote the emergence of resistant strains. However, the quinolones are more reliable than the macrolides and doxycycline against pneumococcal strains that exhibit reduced susceptibility to penicillin G. 5. Appropriate diagnostic studies for patients with moderately-severe to severe pneumonis include sputum Gram's stain and culture (for those patients who expectorate purulent sputum), blood cultures, and acute serum sample, and --in some circumstnaces--urinary antigen test for Legionella pneumophila. 6. Appropriate initial therapy for patients requiring hospitalization includes a third-generation cephalosporin (such as ceftriaxone or cefotaxime) plus a macrolide or a quinolone.
Insights
Diagnosing community-acquired pneumonia involves clinical assessment and chest imaging. Treatment options include macrolides, quinolones, or doxycycline, with quinolones showing reliability against resistant strains.
Area of Science:
- Medicine
- Infectious Diseases
- Pulmonology
Background:
- Community-acquired pneumonia (CAP) diagnosis relies on clinical history, physical examination, and chest X-ray.
- Empirical treatment choices for pneumonia include macrolides, respiratory quinolones, or doxycycline.
- Concerns exist regarding quinolone monotherapy promoting resistant strains, yet they offer reliability against penicillin-resistant Streptococcus pneumoniae.
Purpose of the Study:
- To outline diagnostic criteria for community-acquired pneumonia.
- To discuss empirical antibiotic selection for pneumonia treatment.
- To highlight appropriate diagnostic studies and initial therapy for hospitalized pneumonia patients.
Main Methods:
- Review of diagnostic approaches for community-acquired pneumonia.
- Analysis of antibiotic efficacy and resistance patterns.
- Identification of recommended diagnostic tests and therapeutic regimens for hospitalized patients.
Main Results:
- Pneumonia diagnosis is based on history, physical exam, and chest X-ray.
- Antibiotic choices include macrolides, quinolones, or doxycycline, with quinolones effective against resistant pneumococci.
- Diagnostic studies for severe pneumonia may include sputum Gram's stain/culture, blood cultures, and Legionella urinary antigen testing.
Conclusions:
- Accurate diagnosis of pneumonia is crucial for appropriate management.
- Antibiotic selection should consider efficacy against common pathogens and resistance profiles.
- Hospitalized patients with pneumonia often require combination therapy, such as a cephalosporin plus a macrolide or quinolone.
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