Bacterial Pneumonia Etiology and Epidemiology
Bacterial pneumonia is an infection of the lungs that can range from mild to life-threatening. The most common causative bacterium is Streptococcus pneumoniae (Gamache, 2020a). Other causative bacteria include:
Transmission Routes:
- Inhalation
- Aspiration
- Hematogenous route
Classifications:
- Community-acquired pneumonia (CAP): Contracted within the community.
- Hospital-acquired pneumonia (HAP): Contracted in healthcare settings by nonintubated patients after 48 hours of hospitalization.
- Ventilator-Associated Pneumonia (VAP): Contracted post-ventilator use.
- HCAP (healthcare-associated pneumonia) is included in the spectrum of HAP and VAP (ventilator-associated pneumonia). Patients with HCAP need therapy for MDR pathogens contracted in healthcare settings such as acute care, assisted living, long-term care facilities and dialysis centers.
Types of Bacteria
CAP:
Typical bacteria
- S. pneumoniae (most common bacterial cause)
- Haemophilus influenzae
- Moraxella catarrhalis
- Staphylococcus aureus
- Group A streptococci
- Enterobacteriaceae
Atypical bacteria
- Mycoplasma pneumoniae
- Chlamydia trachomatis
- Chlamydophila pneumonia
Viruses
Atypical Pneumonia (Walking Pneumonia):
- Mycoplasma species
- Chlamydophila species
- Legionella species
- Coxiella burnetii
- Bordetella pertussis
HAP, HCAP, and VAP:
- Pseudomonas aeruginosa
- S aureus
- Klebsiella pneumoniae
- MSSA
- Escherichia coli
- Acinetobacter baumannii
- Moraxella catarrhalis
Aspiration Pneumonia:
- K pneumoniae
- S pneumoniae
- H influenza
- S aureus
- K pneumoniae
- E coli
ICD-10 Code for Bacterial Pneumonia:
- J15.9 (Unspecified bacterial pneumonia)
Risk Factors for Bacterial Pneumoniae:
- Recent infections (e.g., cold, flu, viral pneumonia)
- Comorbidities (e.g., lung disease, asthma, heart disease, diabetes, HIV/AIDS)
- Weakened immune system
- Age (children under 2 and adults over 65)
- Malnourishment
- Exposure to chemicals, pollutants, or toxic fumes
- Smoking
- Excessive alcohol use
- Acute care (ventilator use, recent surgery, sedation, intubation)
- Aspiration risks (e.g., stroke, seizure, weakened gag reflex)
Bacterial Pneumonia Symptoms:
- Fever (up to 105°F)
- Chills with shivering
- Excessive sweating
- Sharp or stabbing chest pain
- Productive cough with yellow, green, or bloody secretions
- Tachycardia
- Tachypnea
- Dyspnea
- Fatigue
- Confusion (especially in older adults)
- Anorexia
- Cyanosis of lips and nails
Complications:
- Respiratory failure
- Bronchiectasis
- Pulmonary abscess
- Superinfection
- Necrotizing pneumonia
- Parapneumonic pleural effusions
- Empyema
- Ventilator dependence
- Acute respiratory distress syndrome (ARDS)
- Meningitis
- Death
Bacterial Pneumonia Diagnosis
Diagnosis includes:
- Imaging:
- Chest x-ray
- CT scan
- Laboratory Tests:
- CBC with differential
- Chemistry panel
- Arterial blood gas (ABG)
- Pleural fluid culture
- Sputum gram stain and culture
- Bronchoscopy
- Pulse oximetry
Bacterial Pneumonia Management
Management includes:
- Medications:
- Antibiotics (based on bacteria)
- Analgesics
- Antipyretics
- Intravenous (IV) fluids
- Oxygen supplementation
- Therapies:
- Chest physiotherapy
- Mechanical ventilation
- Cardiac monitoring
Bacterial Pneumonia Nursing Care Plan
Assessment
- History:
- Past/present health conditions
- Current symptoms
- Medication history
- Surgical history
- Recent social habits (e.g., exposure to illness, smoking)
- Physical Examination:
- Tachycardia, tachypnea, dyspnea
- Lung sounds (rhonchi, rales, wheezing, egophony, tracheal deviation, dullness on percussion, diminished breath sounds, accessory muscle use, pleural friction rub, lymphadenopathy)
- Low oxygen saturation
- Weakness, anorexia
- Altered level of consciousness, disorientation, decreased cognition, confusion
Nursing Diagnoses/Patients at Risk For
- Deficient knowledge of disease and disease processes
- Electrolyte imbalance
- Fatigue
- Altered levels of consciousness
- Acute confusion
- Deficient fluid volume
- Imbalanced fluid volume
- Unstable blood pressure
- Imbalanced nutrition
- Impaired gas exchange
- Ineffective breathing pattern
- Falls
- Injury
Interventions
- Monitor vital signs, levels of consciousness, efficacy of treatment, input and output, respiratory status, pulse oximetry (oxygenation), cardiac status, ABG
- Provide comfort measures and therapies as ordered (medications, IV fluids, oxygen)
- Provide cool mist humidification
- Increase fluid intake
- Encourage chest physiotherapy (manual and/or vest)
- Encourage deep breathing and coughing
- Suction if needed
- Encourage ambulation if possible
- Maintain fall precautions
Note: Do not encourage cough suppression; coughing aids in moving and removing excess fluid in the lungs (American Lung Association, 2021b).
Expected Outcomes
- Reduction of symptoms
- Vital signs within a normal clinical range
- Respiratory status improvement
- Lab values reflecting adequate respiratory and cardiac function
- Compliance with medication regimen
- Compliance with adequate fluid intake
- No report of new falls and/or injuries
Individual/Caregiver Education
- Disease process and management
- Importance of fluid intake
- Home humidification
- Monitoring pulse oximetry if available
- Self-care measures (quiet space, relaxation techniques, deep breathing, ambulation, steamy bath/shower)
- Medication compliance
- Smoking cessation support
- Available vaccines (PCV13, PPSV23)
- Family and caregiver support for ADLs and monitoring symptoms
- Signs and symptoms to notify the provider (e.g., persistent headaches, increased confusion difficulty breathing, shortness of breath with activity)
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Additional Information
Content Release Date
4/1/2022
Content Expiration
12/31/2027
References
- American Lung Association. (2021). Pneumonia symptoms and diagnosis. https://www.lung.org/lung-health-diseases/lung-disease-lookup/pneumonia/symptoms-and-diagnosis
- American Lung Association. (2021b). Pneumonia treatment and recovery. https://www.lung.org/lung-health-diseases/lung-disease-lookup/pneumonia/treatment-and-recovery
- Centers for Disease Control and Prevention. (2020b). Pneumococcal disease symptoms & complications. https://www.cdc.gov/pneumococcal/signs-symptoms/?CDC_AAref_Val=https://www.cdc.gov/pneumococcal/about/symptoms-complications.html
- Centers for Disease Control and Prevention. (2020a). Pneumonia. https://www.cdc.gov/pneumonia/about/?CDC_AAref_Val=https://www.cdc.gov/pneumonia/causes.html
- DerSarkissian, C. (2020). What is bacterial pneumonia? https://www.webmd.com/lung/bacterial-pneumonia
- Gamache, J. (2020a). Bacterial pneumonia. https://emedicine.medscape.com/article/300157-overview#showall
- Gamache, J. (2020b). Bacterial pneumonia clinical presentation. https://emedicine.medscape.com/article/300157-clinical#showall
- Schiffman, G. (2021). Bacterial pneumonia. https://www.emedicinehealth.com/bacterial_pneumonia/article_em.htm
- Sattar, S.B.A., Nguyen, A.D., Sharma S. (2024). Bacterial Pneumonia. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK513321/
- Sanivarapu, R.R., Vaqar, S., Gibson, J. (2024). Aspiration Pneumonia. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK470459/
- Shebl E, Gulick, P.G. (2023). Nosocomial Pneumonia. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK535441/
- Almirall, J., Boizeda, R., De la Torree, M.C., Torres, A. (2021). Aspiration pneumonia: A renewed perspective and practical approach. Respiratory Medicine. https://www.sciencedirect.com/science/article/pii/S0954611121001918