The finding of HBsAg positivity and portal hypertension (as indicated by a high serum ascitic albumin gradient ascites and dilated portal vein on ultrasonography) with occurrence of spontaneous ascitic fluid infection of the monomicrobial non-neutrocytic bacterascites variety suggests the presence of chronic liver disease (chronic viral hepatitis - HBV-related), which got decompensated by the current acute illness. This evidence concerns the gene ALB and infection.