Traditionally, three fourths of spontaneous bacterial peritonitis infections have been caused by aerobic gram-negative organisms (50% of these being Escherichia coli), with one fourth of these infections are due to aerobic gram-positive organisms (19% streptococcal species). E coli is demonstrated in the image below.
Source : http://emedicine.medscape.com/article/789105-overview
Source : http://emedicine.medscape.com/article/789105-overview
