Atypical pneumonia - Revision history

Danbot: Expand: organism-specific clues, evaluation, management referencing CAP page for dosing templates

2026-03-21T01:39:48Z

Expand: organism-specific clues, evaluation, management referencing CAP page for dosing templates

← Older revision		Revision as of 01:39, 21 March 2026
Line 1:		Line 1:
	==Background==		==Background==
	*~~Atypical bugs~~: ~~chlamydia~~ pneumoniae, [[~~legionella~~ pneumophila]], [[~~mycoplasma pneumoniae~~]]		*Pneumonia caused by organisms not covered by standard beta-lactam antibiotics
			*Classic ''atypical'' organisms: [[Mycoplasma pneumoniae]], [[Chlamydophila pneumoniae]], [[Legionella pneumophila]]
			*Frequently presents with more gradual onset and extrapulmonary symptoms compared to typical bacterial pneumonia
			*Can be difficult to distinguish clinically from typical [[community acquired pneumonia]]; many guidelines recommend empiric coverage for both

	==Clinical Features==		==Clinical Features==
	*~~Atypical presentation~~: ~~more likely to have extra-pulmonary symptoms~~, ~~i.e.~~ arthralgias, fever, ~~malaise~~, ~~headache~~		*Gradual onset (days) vs abrupt in typical pneumonia
			*Dry, nonproductive cough (early — may become productive later)
			*Prominent extrapulmonary symptoms: [[headache]], myalgias, arthralgias, malaise, [[pharyngitis]]
			*Low-grade [[fever]]
			*Exam may be less impressive than CXR findings (''walking pneumonia'')
			*'''Organism-specific clues:'''
			**''Mycoplasma:'' Young adults, bullous myringitis, erythema multiforme, cold agglutinins
			**''Legionella:'' Older adults, smokers; [[diarrhea]], [[hyponatremia]], relative bradycardia, elevated LFTs
			**''Chlamydophila:'' Hoarseness, biphasic illness (pharyngitis → pneumonia)

	==Differential Diagnosis==		==Differential Diagnosis==
Line 9:		Line 20:

	==Evaluation==		==Evaluation==
			*[[CXR]]: patchy infiltrates, often bilateral; may show diffuse interstitial pattern
			*Labs: CBC, BMP, procalcitonin
			*Legionella urinary antigen (only detects serogroup 1 — covers ~70% of cases)
			*Consider Mycoplasma IgM if diagnosis unclear
			*Severity scoring: [[CURB-65]] or PSI to guide disposition

	==Management==		==Management==
	*~~Macrolide antibiotic~~, ~~e.g.~~ [[~~azithromycin~~]]		*Empiric coverage for atypicals included in standard CAP regimens per guidelines:
			**Outpatient (healthy, no comorbidities): [[Azithromycin]] or [[doxycycline]] monotherapy
			**Outpatient (comorbidities): Respiratory fluoroquinolone ([[levofloxacin]] or [[moxifloxacin]]) OR beta-lactam + macrolide
			**Inpatient: Beta-lactam + macrolide OR respiratory fluoroquinolone
			*See [[community acquired pneumonia]] for detailed antibiotic dosing via templates

	==Disposition==		==Disposition==
			*Per [[CURB-65]] or clinical judgment
			*Most atypical pneumonias are mild and managed outpatient

	==See Also==		==See Also==
	*[[Pneumonia]]		*[[Community acquired pneumonia]]
			*[[Pneumonia (main)]]
	~~==External Links==~~		*[[Legionella pneumophila]]

	==References==		==References==
	<references/>		<references/>

	[[Category:ID]]		[[Category:ID]]
			[[Category:Pulmonary]]

Rossdonaldson1: /* Differential Diagnosis */

2016-09-08T10:18:26Z

Differential Diagnosis

← Older revision		Revision as of 10:18, 8 September 2016
Line 6:		Line 6:

	==Differential Diagnosis==		==Differential Diagnosis==
			{{Causes of pneumonia}}

	==Evaluation==		==Evaluation==

Rossdonaldson1 at 10:17, 8 September 2016

2016-09-08T10:17:56Z

← Older revision		Revision as of 10:17, 8 September 2016
Line 1:		Line 1:
	==Background==		==Background==
	*Atypical bugs: chlamydia pneumoniae, [[legionella pneumophila]], [[mycoplasma pneumoniae]]		*Atypical bugs: chlamydia pneumoniae, [[legionella pneumophila]], [[mycoplasma pneumoniae]]

			==Clinical Features==
	*Atypical presentation: more likely to have extra-pulmonary symptoms, i.e. arthralgias, fever, malaise, headache		*Atypical presentation: more likely to have extra-pulmonary symptoms, i.e. arthralgias, fever, malaise, headache

	==~~Treatment~~==		==Differential Diagnosis==

			==Evaluation==

			==Management==
	*Macrolide antibiotic, e.g. [[azithromycin]]		*Macrolide antibiotic, e.g. [[azithromycin]]

			==Disposition==

	==See Also==		==See Also==
	*[[Pneumonia]]		*[[Pneumonia]]

			==External Links==

			==References==
			<references/>
	[[Category:ID]]		[[Category:ID]]

Rossdonaldson1: /* See Also */

2016-09-08T10:17:12Z

ClaireLewis at 23:19, 7 September 2016

2016-09-07T23:19:58Z

← Older revision		Revision as of 23:19, 7 September 2016
Line 8:		Line 8:
	==See Also==		==See Also==

	[[Category:~~Infectious Disease~~]]		[[Category:ID]]

ClaireLewis at 23:19, 7 September 2016

2016-09-07T23:19:12Z

← Older revision		Revision as of 23:19, 7 September 2016
Line 2:		Line 2:
	*Atypical bugs: chlamydia pneumoniae, [[legionella pneumophila]], [[mycoplasma pneumoniae]]		*Atypical bugs: chlamydia pneumoniae, [[legionella pneumophila]], [[mycoplasma pneumoniae]]
	*Atypical presentation: more likely to have extra-pulmonary symptoms, i.e. arthralgias, fever, malaise, headache		*Atypical presentation: more likely to have extra-pulmonary symptoms, i.e. arthralgias, fever, malaise, headache

			==Treatment==
			*Macrolide antibiotic, e.g. [[azithromycin]]

			==See Also==

			[[Category:Infectious Disease]]

ClaireLewis at 17:46, 7 September 2016

2016-09-07T17:46:38Z

← Older revision		Revision as of 17:46, 7 September 2016
Line 1:		Line 1:
	==Background==		==Background==
	Atypical ~~pneumonia is a type of pneumonia that is not caused by the typical pathogens that classically cause pneumonia~~, ~~which include Streptococcus pneumoniae~~, ~~Staphylococcus aureus. Klebsiella~~ pneumoniae~~, and Haemophilus influenzae. The~~ presentation ~~of atypical pneumonia also differs from that of "typical" pneumonia, in that~~ extra-pulmonary symptoms ~~are more likely present~~, ~~such as arthralgia~~, ~~fatigue~~, ~~fever~~, headache~~, myalgia. The organisms most commonly responsible for atypical pneumonia include Chlamydia pneumoniae, Legionella pneumoniae, and, Mycoplasma pneumoniae.~~		*Atypical bugs: chlamydia pneumoniae, [[legionella pneumophila]], [[mycoplasma pneumoniae]]
			*Atypical presentation: more likely to have extra-pulmonary symptoms, i.e. arthralgias, fever, malaise, headache

AnthonyLucero: Created a new page with a background section

2016-09-05T18:04:38Z

Created a new page with a background section

New page

==Background==
Atypical pneumonia is a type of pneumonia that is not caused by the typical pathogens that classically cause pneumonia, which include Streptococcus pneumoniae, Staphylococcus aureus. Klebsiella pneumoniae, and Haemophilus influenzae. The presentation of atypical pneumonia also differs from that of "typical" pneumonia, in that extra-pulmonary symptoms are more likely present, such as arthralgia, fatigue, fever, headache, myalgia. The organisms most commonly responsible for atypical pneumonia include Chlamydia pneumoniae, Legionella pneumoniae, and, Mycoplasma pneumoniae.

← Older revision		Revision as of 10:17, 8 September 2016
Line 7:		Line 7:

	==See Also==		==See Also==
			*[[Pneumonia]]

	[[Category:ID]]		[[Category:ID]]