It is used to render the urine acid in cases where it is alkaline, loaded with phosphates or purulent, and is thus useful in cases of cystitis.
Purulent discharge came out through the urethra.
Purulent exudate extends along the meningeal membranes, accompanied by hemorrhage and thrombosis.
Purulent inflammation affecting the skull bones.
Purulent sputum and the presence of wheeze may also indicate underlying lung disease.
Purulent wound drainage or presence of abscess.