However, TBP should be considered with the following criteria: Cirrhotic patients with Child Pugh class B; TB identified at additional sites; lymphopenia in the peripheral blood; an ascitic protein concentration of >25 g/l; a predominance of lymphocytes in ascites; ascitic ADA activity levels of >27 U/l; and ascitic LDH levels of >90 U/l. The gene discussed is ADA; the disease is lymphopenia.