Table 1.

Most common pathogen groups according to the presumed source of infection.

	Urinary	Respiratory	Intra-Abdominal	Intra Vascular Catheter
Community acquired	Enterobacterales Enterococcus sp. P. aeruginosa *	Streptococcus pneumoniae ++ Legionella sp. *** Enterobacterales S. aureus P. aeruginosa * H. influenzae	Enterobacterales Enterococcus sp. Candida sp. Anaerobes Polymicrobial	Coagulase neg. staphylococci S. aureus Enterobacterales
Hospital acquired	Enterobacterales Candida sp. Enterococcus sp. P. aeruginosa Acinetobacter sp.	Enterobacterales S. aureus P. aeruginosa Acinetobacter sp.	Enterobacterales P. aeruginosa Enterococcus sp. Candida sp. Anaerobes Polymicrobial	Enterobacterales S. aureus Coagulase neg. staphylococci P. aeruginosa Acinetobacter sp.

Describes the most common pathogens. Non-exhaustive list. ++ Largely predominant. * In patients with chronic respiratory disease and patients with long-term indwelling catheter for respiratory and urinary sources, respectively. *** Legionella sp. does not cause BSIs but should be included in severe community-acquired respiratory infections.