The radiological appearances of 'Q' fever pneumonia.

The chest film findings in a series of 21 cases of serologically proven 'Q' fever with radiological evidence of pneumonia were reviewed retrospectively. Segmental opacities which were slow to clear, often with loss of volume and sometimes lobar consolidation, were the most usual findings. Lesions were occasionally multiple and sometimes became rounded during resolution. The appearances were not considered sufficiently distinctive to allow the diagnosis to be made in the acute phase of the illness, although the appearance of round pneumonias which are slow to resolve should alert the radiologist to this possible diagnosis. The findings are discussed in relation to previously reported series.