<prompt> Spontaneous bacterial Peritonitis is indicated by presence of ___ cell in ascitic fluid:500 cellcu mm, absolute lymphocyte500 cellcu mm, absolute PMN250 cellscu mm, absolute PMN250 cellscu mm, absolute lymphocyte  <response>: Ans. c 250cellscu.mm, Absolute PMNRef: Harrisons 19the pg. 846 1989; Sabistons 20the pg.1078Spontaneous Bacterial Peritonitis SBP SBP is a bacterial infection of ascitic fluid in the absence of an intra-abdominal source of infection, like perforation, abscess, acute pancreatitis, or cholecystitis. More commonly seen in Low protein ascites in Cirrhosis, also seen in Nephrotic Syndrome and CCF. Rare in patients who have high protein ascites like Carcinomatosis. MC organism isolated are E. Coli and Klebsiella Pnuemonia. In children Group A Streptococcal and Staphylococcus aureus are causes. CF- Abdominal pain, fever and Leucocytosis. Investigation: 250 NeutrophilsCumm. Culture is Monomicrobial Polymicrobial think of Secondary peritonitis. Treatment of Choice- Third Generation Cephalosporins In the Natural history of cirrhosis, if SBP occurs then 1 year and 2 year survival rates are 30 to 20. 