Pneumonia

Index
General
Community Acquired
Nosocomial
Immunocompromised Host

General
Symptoms
 
Cough
 
Initially dry
Later becoming productive
May contain blood (rust colour, or frank blood)
Pleuritic chest pain
Fever - rigors, night sweats
Malaise
Anorexia
Headache
Signs
 
General
 
Pyrexia
Tachypnoea
Tachycardia
Hypoxaemia
Hypotension
Confusion / Irritability / Drowsiness
Respiratory
 
Reduced chest wall movement
Dull percussion note
Bronchial breath sounds
Fine crepitations
Risk Factors
 
Smoking
Corticosteroid use
Pre existing lung condition
Recent Upper Respiratory Tract Infection (URTI)
Advanced age
Alcohol
Contact with birds
Investigations
 
CXR - Lobar consolidation
Oxygen saturation (pulse oximetry)
ABG
Sputum - MCS
 
MCS
Gram stain
Ziehl Neelson (ZN) stain
Consider induced by physiotherapy if poor specimen
Blood - MCS
Serology - antibody titres to atypical pneumonias
Bronchoalveolar lavage - Bronchial washings - MCS
Treatment
 
Sitting up
Oxygen therapy
Consider CPAP ventilation if severely hypoxic
Fluid management
Analgesia - NSAIDs, or Opiates (eg. Pethidine or Morphine), however, be cautious of respiratory depression with opiates
Empiric antibiotic therapy - according to current therapeutic guidelines (see below)
Specific antibiotic therapy - tailored to specific organism

Community Acquired
Common Organisms (Gram +ve)
 
Streptococcus Pneumoniae
Chlamydia Pneumoniae
Haemophilus Influenzae
Mycoplasma Pmeumoniae
Legionella Pneumoniae
Klebsiella Pneumoniae
Mycobacterium Tuberculosis
Staphylococcus Aureus
Treatment
 
1st line - Macrolide antibiotics (eg. Erythromycin or Roxythromycin), or, Penicillin (eg. Amoxycillin)
2nd line - 3rd generation cephalosporin (eg. Cefotaxime)
3rd line - Flucloxacillin + Aminoglycoside (eg. Gentamicin)
If Staphylococcus is causative organism - Flucloxacillin

Nosocomial
Common Organisms (Gram -ve)
 
All of the above plus:
Escherichia Coli
Pseudomonas
Aspergillus
Treatment
 
1st line - Penicillin (eg. Amoxycillin) + Aminoglycoside (eg. Gentamicin)
2nd line - 3rd generation cephalosporin (eg. Cefotaxime)
3rd line - Flucloxacillin + Aminoglycoside (eg. Gentamicin)
4th Line - Imipenem
If Staphylococcus is causative organism - Vancomycin

Immunocomprimised Host
Common Organisms
 
All of the above plus:
Pneumocystis Carinii Pneumoniae (PCP)
Candida Albicans
Treatment
 
1st line - Penicillin (eg. Amoxycillin) + Aminoglycoside (eg. Gentamicin)
2nd line - 3rd generation cephalosporin (eg. Cefotaxime)
3rd line - Flucloxacillin + Aminoglycoside (eg. Gentamicin)
4th Line - Imipenem
If PCP is causative organism - Cotrimoxazole