Foci of bronchopneumonia and lesions of alveolar emphysema. Note the dark-coloured lobes affected by heterogeneous exsudative inflammation of lobular distribution. The interlobular tissue of the lobe located in the centre of the image is similarly distended due to inflammatory oedematous infiltration. Some areas of the lung (below and to the left) exhibit excessively dilated alveoli probably as a way of compensating the respiratory difficulties caused by bronchopneumonia (vicarious emphysema).

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