Related Experiment Video
Updated: Aug 10, 2026
Osteopathic Manipulative Treatment as a Useful Adjunctive Tool for Pneumonia
Published on: May 6, 2014
Diagnosis of nosocomial pneumonia
1University of Missouri-Kansas City School of Medicine 64108-2792.
Abstract:
Nosocomial pneumonia occurs in 0.6% of hospitalized patients. The usual causative agents are gram-negative bacilli, Staphylococcus aureus, Streptococcus pneumoniae, and anaerobic bacteria. In immunocompromised hosts, the differential diagnosis also includes fungi, mycobacteria, viruses, Nocardia, and Pneumocystis carinii. Important risk factors for the development of nosocomial pneumonia include prolonged mechanical ventilation, thoracic or upper abdominal surgery, altered mental status, underlying immunosuppression, chronic obstructive pulmonary disease, and the use of antacids or histamine type 2 blockers. Colonization of the oropharynx and tracheal secretions with gram-negative aerobic bacteria is common in hospitalized patients with or without pneumonia. The diagnosis of nosocomial pneumonia is usually based on the clinical features of dyspnea, cough, fever, purulent sputum production, new pulmonary infiltrates, hypoxemia, and leukocytosis. However, the clinician must recognize that the presence of these features is neither sensitive nor specific in the diagnosis of nosocomial pneumonia. Microbiologic diagnosis is also difficult because blood cultures are usually negative, and cultures of tracheal secretions, although usually sensitive, are not specific. Invasive procedures may prove useful, but most have yet to be studied in large groups of patients with nosocomial pneumonia.
Insights
Nosocomial pneumonia affects 0.6% of hospitalized patients, often caused by gram-negative bacilli and Staphylococcus aureus. Diagnosis relies on clinical signs and cultures, but challenges remain in identifying causative agents and optimizing treatment strategies.
Area of Science:
- Medicine
- Infectious Diseases
- Pulmonology
Background:
- Nosocomial pneumonia (NP) affects 0.6% of hospitalized patients.
- Commonly caused by gram-negative bacilli, Staphylococcus aureus, Streptococcus pneumoniae, and anaerobes.
- Immunocompromised patients may also develop fungal, mycobacterial, viral, Nocardia, or Pneumocystis carinii infections.
Purpose of the Study:
- To review the epidemiology, risk factors, clinical presentation, and diagnostic challenges of nosocomial pneumonia.
- To highlight the difficulties in microbiologic diagnosis and the limitations of current diagnostic methods.
Main Methods:
- Review of existing literature on nosocomial pneumonia.
- Analysis of common causative agents and risk factors.
- Evaluation of diagnostic criteria and microbiologic techniques.
Main Results:
- Key risk factors include prolonged mechanical ventilation, surgery, altered mental status, immunosuppression, COPD, and use of antacids/H2 blockers.
- Clinical diagnosis is based on symptoms like dyspnea, cough, fever, and new infiltrates, but lacks sensitivity and specificity.
- Microbiologic diagnosis is challenging due to negative blood cultures and non-specific tracheal secretion cultures.
Conclusions:
- Accurate diagnosis of nosocomial pneumonia is complex, requiring careful consideration of clinical and microbiologic data.
- Further research into invasive diagnostic procedures is needed to improve diagnostic accuracy.
Related Concept Videos
01:30Pneumonia I: Introduction
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
01:30Pneumonia III: Complications and Assessment
01:28Pneumonia IV: Management
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
01:30Pneumonia V: Nursing management and Prevention
The nurse must practice strict medical asepsis and adhere to infection control guidelines to minimize healthcare-associated infections.
Enhance airway patency
Position the patient correctly to facilitate drainage of the affected lung segments. Manual or mechanical percussion and vibration can also be employed.
01:14Atypical Pneumonia
01:29Pneumonia I: Introduction