A total of 3,907 Gram-positive cocci were analyzed. The Gram-positive organisms most frequently isolated from bloodstream infections were Staphylococcus aureus (2,218 strains; 20.2% of total), ...

Gram stains had a low rate of positive results (28.6 percent); this result is in agreement with two recently reported studies, in which gram stains were positive in only 25 and 32 percent of cases, ...