What is special stains test in biopsy? After endoscopy of stomach , gastric erosions are seen and biopsy is advised. The biopsy report is taking more time as they want to do a special stain test . What is the reason for that test?

The biopsy stain test is to identify the type of bacteria

Certain stains highlight only certain bacteria, gram negative or gram positive. As Tickle says, they are looking for the cause of your problems.