In the 1980's some series had focused on the ASCITIC PH LEVEL AND LACTATE concentrations in case of sterile ascitis or spontaneous bacterial peritonitis. recently Jama published a review focusing on the diagnosis of bacterial ascitis ( 2OO8).

In PubMED you may find, as i done the references;

I join two abstracts and the reference of an old paper but still available in free fulltext.

Thank You so much for your answer,

I will try to find articles that you referred.