MARTIN M. ROTKER / SCIENCE PHOTO LIBRARY MARTIN M. ROTKER / SCIENCE PHOTO LIBRARY
Gross specimen of human lungs infected with bronchopneumonia. The bronchopneumonia pattern has been associated with hospital-acquired pneumonia, and with specific organisms such as Staphylococcus aureus, Klebsiella, E. coli, and Pseudomonas. In bacterial pneumonia, invasion of the lung parenchyma by bacteria produces an inflammatory immune response. This response leads to a filling of the alveolar sacs with exudate. The loss of air space and its replacement with fluid is called consolidation. In bronchopneumonia, or lobular pneumonia, there are multiple foci of isolated, acute consolidation, affecting one or more pulmonary lobes. Bronchopneumonia is more likely than lobar pneumonia to be associated with Streptococcus.(.
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