Consolidation of the lung is simply a “solidification” of the lung tissue due to accumulation of solid and liquid material in the air spaces that would have normally been filled by gas. The most common cause of consolidation is pneumonia – inflammation of the lung – as cellular debris, blood cells and exudate collects in the alveoli (air sacs) of the lung.Consolidation may be patchy in distribution and involve only certain lobules of the lung although it can be widespread and affect entire lobes of the lung. Although the term ‘consolidation’ is often used loosely and associated with pneumonia, it can also occur for various other reasons.Thus when a radiologist has reported a chest X-ray examination and notes the presence of consolidation he/she is simply stating that some of the lung airspace has been replaced by a fluid.It is sometimes useful to perform an apical lordotic view to help demonstrate equivocal pathological appearances in the upper lobes.Bibersteinia trehalosi (formerly Pasteurella trehalosi) causes septicemia in lambs 4–9 mo old (systemic pasteurellosis).
Strictly speaking, the term consolidation does not imply any particular aetiology or pathology.Accumulation of pus, edema and even collapse of the lung (atelectasis) may also result in consolidation.The collection of solids and fluid is not isolated to the air spaces and the surrounding lung parenchyma may also be edematous.Thus, the term consolidation and pneumonia have very similar meaning and are almost used interchangeably.
( other causes include chronic pneumonia, pulmonary oedema and neoplasm).In calves, alveolar macrophage function is impaired after viral pneumonia.