Aidan: /* Common Causes */

2022-02-01T11:55:36Z

Common Causes

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 === Common Causes ===
-* [[Mycoplasma pneumoniae]], though rarely causes severe disease
+**[[Streptococcus pneumoniae]]
 === Unusual or Resistant Infections ===

Aidan: Created page with "== Differential Diagnosis == === Common Causes === * Streptococcus pneumoniae * Legionella (legionellosis) * Mycoplasma pneumoniae, though rarely causes seve..."

2021-11-03T12:56:33Z

Created page with "== Differential Diagnosis == === Common Causes === * Streptococcus pneumoniae * Legionella (legionellosis) * Mycoplasma pneumoniae, though rarely causes seve..."

New page

== Differential Diagnosis ==

=== Common Causes ===

* [[Streptococcus pneumoniae]]
* [[Legionella]] ([[legionellosis]])
* [[Mycoplasma pneumoniae]], though rarely causes severe disease
* [[Chlamydia pneumoniae]]
* [[Haemophilus influenzae]]
* Resistant forms of usual infectious causes

=== Unusual or Resistant Infections ===
{| class="wikitable"
!Organism
!Clinical Clues
|-
|[[Mycobacterium tuberculosis]] ([[tuberculosis]])
|older age, residence in endemic country, [[HIV]]
|-
|[[Non-tuberculous mycobacteria]]
|[[COPD]], [[HIV]]
|-
|[[Nocardia]] ([[nocardiosis]])
|immunocompromised host
|-
|[[Actinomyces]] ([[actinomycosis]])
|aspiration, chest wall involvement
|-
|[[Aspergillus]] ([[aspergillosis]])
|immunocompromised host, vascular invasion
|-
|[[Histoplasma capsulatum]] ([[histoplasmosis]])
|exposure to Mississippi River Valley
|-
|[[Coccidioides immitis]] ([[Coccidiomycosis]])
|exposure to southwestern US
|-
|[[Blastomyces dermatitidis]] ([[blastomycosis]])
|exposure to southeast and midwest US
|-
|[[Coxiella burnetii]] ([[Q fever]])
|exposure to sheep, cattle, or cats
|-
|[[Francisella tularensis]] ([[tularemia]])
|exposure to rabbits or ticks
|-
|[[Chlamydia psittaci]] ([[psittacosis]])
|exposure to birds
|-
|[[Yersinia pestis]] ([[plague]])
|exposure to rats
|-
|[[Leptospira]] ([[leptospirosis]])
|exposure to rats or urine-contaminated water
|-
|[[Burkholderia pseudomallei]] ([[melioidosis]])
|rodent exposure in Southeast Asia, similar presentation to TB
|-
|[[Paragonimus westermani]] ([[paragonimiasis]])
|travel to Asia, Africa, or Central and South America
|-
|[[Hantavirus]]
|mouse exposure in southwestern US
|-
|[[Bacillus anthracis]] ([[anthrax]])
|contact with infected animal carcasses or hides, and more common in Asia, Iran, Turkey, Greece, and South Africa
|}

=== Non-Infectious Causes ===
{| class="wikitable"
!Disease
!Clinical Clues
|-
! colspan="2" |Neoplastic Disorders
|-
|[[Bronchogenic carcinoma]]
|
|-
|[[Lymphoma]]
|
|-
! colspan="2" |Immunologic Disorders
|-
|[[Granulomatosis with polyangiitis]]
|
|-
|[[Diffuse alveolar hemorrhage]]
|
|-
|[[Cryptogenic organising pneumonia]]
|
|-
|[[Acute eosinophilic pneumonia]]
|
|-
|[[Chronic eosinophilic pneumonia]]
|
|-
|[[Acute interstitial pneumonia]]
|
|-
|[[Pulmonary alveolar proteinosis]]
|
|-
|[[Sarcoidosis]]
|
|-
! colspan="2" |Rheumatic Diseases
|-
|[[Systemic lupus erythematosus]]
|
|-
|[[Rheumatoid arthritis]]
|
|-
|[[Polymyositis]]
|
|-
|[[Dermatomyositis]]
|
|-
! colspan="2" |Vascular Abnormalities
|-
|Heart failure
|
|-
|Pulmonary embolism
|
|-
! colspan="2" |Miscellaneous
|-
|Drug toxicity
|
|}

== Investigations ==

* CT chest
* Consider bronchoalveolar lavage or biopsy

[[Category:Respiratory infections]]

Non-resolving pneumonia - Revision history

Aidan: /* Common Causes */

Aidan: Created page with "== Differential Diagnosis == === Common Causes === * Streptococcus pneumoniae * Legionella (legionellosis) * Mycoplasma pneumoniae, though rarely causes seve..."