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Bacterial Pneumonia. Sung Chul Hwang, M.D. Dept. of Pulmonary and Critical Care Medicine Ajou University School of Medicine. Epidemiology. 6th leading cause of death in U.S. Number one Among the infectious diseases 4 million patients annually in US Incidence 12/1,000/year
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Bacterial Pneumonia Sung Chul Hwang, M.D. Dept. of Pulmonary and Critical Care Medicine Ajou University School of Medicine
Epidemiology • 6th leading cause of death in U.S. • Number one Among the infectious diseases • 4 million patients annually in US • Incidence 12/1,000/year • Mortality in OPD patients 1-5 %, but Inpatients 25%, ICU 50-60%
Definition • Pneumonia is the inflammation of lower respiratory tracts including alveoli, interstitial tissues, and broncioles by the microorganisms, chemical irritations or by an immunological process
Classifications & Terminology • Community Acquired Pneumonia Nosocomial Pneumonia Ventilator Associated Pneumionia • Mild, moderate, severe • Bacterial, viral, fungal, parasitic • Primary vs. Secondary • Immune compromised vs. Normal immunity • Lobar vs interstitial • Typical vs. Atypical
Severe Community Acquired Pneumonia • Respiratory rate > 30/min • PaO2/FiO2 ratio < 250mmHg • Need for Mechanical Ventilation • Diffuse bilateral involvement or multiple lobes, incresing infiltration > 50% within 48 hours • B.P. < 90systolic or 60 mmHg diastolic • Need for vasopressors • Renal failure
Streptococcus pneumoniae Gram + Diplococci
Staphylococcus aureus BAL Fluid
Staphylococcal Pneumonia Pneumatocele
Staphylococcal Pneumonia Osler’s Node
Pseudomonas Pneumonia Ecthyma gangrenosum
Immunofluorescent Ab Test RSV Antigen Detection
Legionella Pneumonia Legionella pneumophila by Silver impregnation Stain
Treatment of CAP <60yrs/OPD/no Comorbid conditions • Pathogens : S. pneumoniae, Mycoplasma& Chlamydia pneumoniae, H. indfluenzae, RSV, Legionella, S. aureus • Treatment : 2nd Generation Cephalosporin + Macrolide or Quinolone monotherapy
Treatment of CAP >60yrs/OPD/with Comorbid conditions • Pathogens : S. pneumoniae, RSV, H. indfluenzae, Gram (-) rod, S. aureus, Morexella catarrhalis, Legionella spp. • Treatment : 2nd Generation Cephalosporin + TMX/SFX, or beta lactam/betalactam inhibitor + Macrolide
Treatment of Severe CAP • Pathogens : S. pneumoniae, Legionella spp. Gram (-) rod, Mycoplasma,H. indfluenzae,S. aureus • Treatment : 3rd Generation Cephalosporin with anti-Pseudomonal activity or + other anti Pseudomonal agent (Imipenem/quinolone) + Macrolide