Pneumonia – Hospital Acquired Pneumonia versus Community Acquired Pneumonia Pathogens

History: 40 year old man with 1 week history of productive cough and fevers. This is a classic case of lobar pneumonia, which is most commonly bacterial in origin. Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus, anaerobes, and gram negative organisms. Community acquired pneumonia is commonly caused by: Pneumococcus, mycoplasma, viruses, and not…

radiologypics

January 19, 2013

1–2 minutes

chest radiograph, ground glass opacity, lobar pneumonia, medicine

History: 40 year old man with 1 week history of productive cough and fevers.

Fig 1: Single frontal upright chest radiograph shows discrete ground glass opacity with consolidation in the right middle lobe — **Right middle lobe pneumonia:** Single frontal upright chest radiograph shows discrete ground glass opacity with consolidation in the right middle lobe

**Right middle lobe pneumonia:** Left lateral chest radiograph in the same patient shows marked consolidation of the right middle lobe, anterior and superior to the right oblique fissure.

Fig 2: Left lateral chest radiograph in the same patient shows marked consolidation of the right middle lobe, anterior and superior to the right oblique fissure — **Right middle lobe pneumonia:** Single frontal upright chest radiograph shows discrete ground glass opacity with consolidation in the right middle lobe

**Right middle lobe pneumonia:** Left lateral chest radiograph in the same patient shows marked consolidation of the right middle lobe, anterior and superior to the right oblique fissure.

This is a classic case of lobar pneumonia, which is most commonly bacterial in origin.

Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus, anaerobes, and gram negative organisms.

Community acquired pneumonia is commonly caused by: Pneumococcus, mycoplasma, viruses, and not commonly legionella or klebsiella.

If the lung consolidation doesn’t improve in 6-8 weeks, the concern is heightened for an obstructing lesion in the bronchus, such as bronchioalveolar cell carcinoma.

Read about the differential diagnosis for lung masses.

Read about the differential diagnosis for a solitary pulmonary nodule.

8 responses to “Pneumonia – Hospital Acquired Pneumonia versus Community Acquired Pneumonia Pathogens”

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February 1, 2013 at 3:32 pm

[…] typically arise from the right side of the trachea. They place the patient at risk for recurrent pneumonia in the lobe supplied by the accessory […]

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January 11, 2014 at 8:21 pm

[…] zone” is when they are faced with interpreting a solo frontal image of the chest, or if, on a two-view chest radiograph, there is difficulty in localizing a certain finding. However, most of the time on two view chest […]

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December 27, 2014 at 3:36 am

[…] Pneumonia – Hospital Acquired Pneumonia versus … – This is a classic case of lobar pneumonia, which is most commonly bacterial in origin. Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus …… […]

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December 28, 2014 at 10:52 am

[…] Pneumonia – Hospital Acquired Pneumonia versus … – This is a classic case of lobar pneumonia, which is most commonly bacterial in origin. Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus …… […]

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Hospital-acquired Pneumonia Differential Diagnosis | My Health

January 3, 2015 at 5:38 am

[…] Pneumonia – Hospital Acquired Pneumonia versus … – This is a classic case of lobar pneumonia, which is most commonly bacterial in origin. Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus …… […]

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Hospital Acquired Pneumonia Versus Community Acquired Pneumonia | My Health

January 3, 2015 at 6:58 am

[…] Pneumonia – Hospital Acquired Pneumonia versus Community … – This is a classic case of lobar pneumonia, which is most commonly bacterial in origin. Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus …… […]

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Hospital Acquired Pneumonia Pathogens | My Health

January 4, 2015 at 10:20 am

[…] Pneumonia – Hospital Acquired Pneumonia versus … – This is a classic case of lobar pneumonia, which is most commonly bacterial in origin. Hospital acquired pneumonia is commonly caused by: Staphylococcus Aureus …… […]

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Hospital Acquired Pneumonia History | My Health

January 4, 2015 at 2:05 pm

[…] Pneumonia – Hospital Acquired Pneumonia versus … – History: 40 year old man with 1 week history of productive cough and fevers. This is a classic case of lobar pneumonia, which is most commonly bacterial in origin…. […]

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