In a patient of the nephritic syndrome with spontaneous bacterial peritonitis, which one of the following micro-organisms is most commonly involved?: (A) Proteus, (B) Escherichia, (C) Pneumococcus, (D) Staphylococcus
Answer is B. Spontaneous bacterial peritonitis means peritonitis without any apparent source of contamination.Enteric gram-negative organism E. coli most commonly encountered but sometime gram-positive organisms such as streptococci and enterococci also responsible.