Related Experiment Videos
Using the microbiology laboratory in the diagnosis of pneumonia
L R Peterson1, C J Shanholtzer
1Infectious Disease Section, Veterans Administration Medical Center, Minneapolis, MN 55417.
Abstract:
Pneumonia/influenza is one of the top ten leading causes of mortality in the United States each year. The identification of the etiologic agent responsible for lower respiratory tract infection plays an important role in the proper management of this clinical problem. The specimens submitted for evaluation are obtained in diverse ways and include expectorated sputum, material from transtracheal and bronchoscopic procedures, pleural fluid and lung aspirates, and biopsy of actual lung tissue. Processing of material can include stained smears, aerobic and anaerobic cultures, and special processing techniques for fungal, viral, Pneumocystis carinii, Legionella, mycobacterial, and mycoplasma identification. Modifications of smear preparation techniques and application of the new DNA probe technology are providing the opportunity for rapid microbiologic testing of clinical specimens with increased sensitivity and specificity, often obviating the need for invasive diagnostic procedures. Laboratory methodology is continually undergoing technological change, and optimal care of the patient with pneumonia requires close cooperation between the attending physician and the clinical laboratory.
Insights
Identifying the cause of pneumonia and influenza is crucial for patient care. New rapid diagnostic methods improve accuracy and may reduce invasive procedures.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Clinical Diagnostics
Background:
- Pneumonia and influenza are leading causes of mortality in the US.
- Accurate identification of the etiologic agent is vital for effective patient management.
- Diverse specimen types are used for diagnosing lower respiratory tract infections.
Purpose of the Study:
- To review current laboratory methodologies for identifying respiratory pathogens.
- To highlight advancements in diagnostic technologies for pneumonia and influenza.
- To emphasize the importance of physician-laboratory collaboration.
Main Methods:
- Analysis of various specimen collection and processing techniques.
- Review of traditional methods like stained smears and cultures.
- Evaluation of specialized techniques for fungal, viral, and bacterial identification.
- Assessment of new DNA probe technology for rapid testing.
Main Results:
- Advanced techniques offer increased sensitivity and specificity in pathogen identification.
- Rapid microbiologic testing can potentially reduce the need for invasive diagnostic procedures.
- Technological advancements are continuously evolving laboratory methodologies.
Conclusions:
- Optimal patient care for pneumonia necessitates close collaboration between physicians and clinical laboratories.
- Rapid diagnostic technologies are enhancing the speed and accuracy of identifying causative agents.
- Ongoing changes in laboratory methods require continuous adaptation for improved patient outcomes.