13 results
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
: Gram Positive, ... • Most common cause ... Physical Exam, CXR ... , ENT exam, CT sinus ... Specificity of 97%) Treatment
Causes of Hemoptysis - Differential Diagnosis Algorithm
Massive Hemoptysis (>I00 mL in 24 hours)
 • Malignancy
 •
Causes of Hemoptysis ... - Differential ... Malformation Normal CXR ... /CT • Hematemesis ... Infection • Bacterial
Rhodococcus - Microbiology Overview

Microbiology:
 • Facultative, intracellular, nonmotile, non-spore-forming
 • Aerobic acid-fast gram-positive coccobacilli
 • Produces
nonmotile, non-spore-forming ... acid-fast gram-positive ... trauma Diagnosis Treatment ... #diagnosis #treatment ... #pulmonary #Bacteria
Miliary Pattern - Chest Radiology
 • Miliary opacities are scattered, small (1 -4 mm) nodules
 •
Pattern - Chest Radiology ... - Select Bacteria ... diagnosis #pulmonary ... #CXR #clinical ... #CT
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
• Most common cause ... Blood cultures • CXR ... seen • Chest CT ... Lung #Abscess #pulmonary ... #differential #
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
Most Common Causes ... high-resolution chest CT ... cultures (sputum for bacteria ... mycobacteria Treatment ... #differential #
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
Differential diagnosis ... lobar pneumonia caused ... respond to the treatment ... #Diagnosis #Radiology ... #Pulmonary #CXR
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Blood cultures are positive ... Cerebral > Splenic, pulmonary ... nodes • Roth’s spots ... Marantic (NTBE) Differential ... • Persistent bacteremia
Pulmonary sequestration
This is an uncommon cause of lobar consolidation.
It is a congenital abnormality.
A nonfunctioning part of
is an uncommon cause ... infection when bacteria ... migrate through the pores ... #Clinical #Radiology ... #CXR #CtChest #
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
Hypercoagulable (APLAS) Microbiology ... Cerebral > Splenic, Pulmonary ... nodes • Roth’s spots ... hematuria, + RF Treatment ... • Persistent bacteremia