History and exam

Other diagnostic factors

common

overcrowding (risk factor)

Outbreaks of pneumonia due to Chlamydia pneumoniae have been observed in military recruits and nursing homes.[5]

illness in other family members

Spread can occur in families.

cough

Nonspecific; may be nonproductive.

fever

Nonspecific sign.

headache

Nonspecific symptom.

rales

Consistent with pneumonia.

wheezes on chest auscultation

Common, but not diagnostic.

tachypnea

Variable, dependent on extent of lung involvement.

uncommon

pleuritic chest pain

May occur with inspiration or cough.

dullness to percussion/reduced air entry/decreased tactile fremitus

May suggest pleural effusion.

Risk factors

strong

overcrowding

Outbreaks of pneumonia due Chlamydia pneumoniae have been observed in military recruits and nursing homes.[5][6][7]

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