title: [Spontaneous bacterial peritonitis (SBP): prevalence and characteristics in a population of 314 cirrhotic patients evaluated at hospital admission].
abstract: BACKGROUND
  The aim of this study was to evaluate the incidence and the characteristics of the infections of ascitic fluid in cirrhotic patients at the moment of hospital admission.
  
  
  METHODS
  A total of 314 patients consecutively submitted to ascitic fluid tap within 3 days of hospital admission were studied. Each patient was classified according to Child-Plugh classes. Neoplastic ascites were excluded. The ascitic fluid was analyzed for PMN count, protein and albumin content, cultural and cytological examinations. The patients with ascitic fluid PMN > 250/ml were immediately treated with antibiotics.
  
  
  RESULTS
  Out of 314 patients 11% had SBP (94% in class C patients according to Child-Plugh classification), 17% CNNA and 3% MNNB. 15% of SBP patients were asymptomatic. Total protein content in ascitic fluid was significantly lower in SBP and MNNB compared to CNNA and sterile ascites. 56% of the isolated bacteria was Gram-negative, and the most frequently found were Streptococcus, Escherichia coli and Staphylococcus. 80% of the patients with ascites infection underwent third generation cephalosporin treatment. SBP mortality (29%) was significantly higher than CNNA (9%), MNNB (10%) and sterile ascites (11%), also taking into account the subgroup without ascites infection and class C group (14%).
  
  
  CONCLUSIONS
  In view of the high incidence (even in the absence of invasive procedures), of the possibility of symptom free patients and of the high mortality of SBP, it is advisable to carry out routine tap in all cirrhotics with ascites at hospital admission.
authors.affiliation: Divisione di Medicina, Azienda Istituti Ospedalieri, Cremona.
authors.forename: A
authors.initials: A
authors.lastname: Marelli
authors.forename: L
authors.initials: L
authors.lastname: Nardecchia
authors.forename: F
authors.initials: F
authors.lastname: De Gennaro
authors.forename: P
authors.initials: P
authors.lastname: Bodini
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001201:Ascites / Q000382:microbiology; D005260:Female; D016905:Gram-Negative Bacterial Infections / Q000175:diagnosis* / Q000401:mortality; D016908:Gram-Positive Bacterial Infections / Q000175:diagnosis* / Q000401:mortality; D017052:Hospital Mortality; D006801:Humans; D007902:Length of Stay; D008103:Liver Cirrhosis / Q000150:complications*; D008297:Male; D008875:Middle Aged; D010538:Peritonitis / Q000382:microbiology* / Q000401:mortality; D015995:Prevalence; D011506:Proteins / Q000032:analysis
chemical_list: D011506:Proteins