The seven most frequently isolated germs were E. coli and Enterococcus ( each n = 19 ) , Klebsiella ( n = 10 ) , Streptococcus viridans ( n = 9 ) , Staphylococcus epidermidis ( n = 5 ) , Morganella morganii ( n = 4 ) , and Bacteroides fragilis ( n = 3 ) , representing 76 % of all agents .
