Interstitial pneumonia is what?

Particular xray: This refers to a kind of xray change seen in some kinds of pneumonia. It is not associated with a particular germ however. Although this was once thought to be the case. ( interstitial pneumonias were thought to be caused more often by viruses, and other atypical germs. The xray pattern however can be caused by things besides infection such as congestive heart failure, or inflammatory lung disease.

Refers to the xray: This refers to a specific x ray pattern in which there is thickening lines that are visible in the lungs. Under the microscope there are changes in the connective tissue that is between the air sacs ((alveoli) . It may be observed in a variety of infections or inflammatory conditions of the lung and and a similar patten on chest x ray may be seen with fluid in the lung ( pulmonary edema).