Table 1.

Microbiology of SWIs.

MICROORGANISM	FREQUENCY
Gram-positive Cocci	60–80%
Staphylococcus aureus	40–45%
Coagulase-negative staphylococcus	20–35%
Gram-negative rods	20–40%
Enterobacter spp	10%
Pseudomonas spp	2–10%
Klebsiella spp	3–8%
Escherichia coli	5%
Proteus spp	2–3%
Fungi	5%
Polymicrobial	10–40%

Note: Adapted from Refs. ¹,¹⁴,¹⁵.